Digest for sci.electronics.repair@googlegroups.com - 7 updates in 3 topics

Stephen Wolstenholme <steve@easynn.com>: Jul 02 09:44AM +0100

On Sat, 1 Jul 2017 12:28:58 -0700 (PDT), "jfeng@my-deja.com"
 
>I think the UK is metricated. The older Imperial units appear when they are being deliberately nostalgic, like in historical dramas. The last I heard, Ireland (not a part of a UK) had an amusing mixture where speed limits were in mph and road distances were in km.
 
The UK started going over to metric measures about 50 years ago but
it's still not complete. Many oldish people, like me, still think in
Imperial units. I think of distances in miles and heights in feet. The
advantage of being an Imperial age is multiple arithmetic bases is not
a problem. Younger metric people are base 10 only!
 
Steve
 
--
Neural Network Software for Windows http://www.npsnn.com
Foxs Mercantile <jdangus@att.net>: Jul 02 04:31AM -0500

On 7/2/2017 3:44 AM, Stephen Wolstenholme wrote:
> The advantage of being an Imperial age is multiple arithmetic
> bases is not a problem. Younger metric people are base 10 only!
 
Not hardly, people don't think of 10 inches as 0.833 feet nor do
they think of 10 feet as 3.333 yards.
 
 
--
Jeff-1.0
wa6fwi
http://www.foxsmercantile.com
 
---
This email has been checked for viruses by AVG.
http://www.avg.com
Stephen Wolstenholme <steve@easynn.com>: Jul 02 11:08AM +0100

On Sun, 2 Jul 2017 04:31:24 -0500, Foxs Mercantile <jdangus@att.net>
wrote:
 
>> bases is not a problem. Younger metric people are base 10 only!
 
>Not hardly, people don't think of 10 inches as 0.833 feet nor do
>they think of 10 feet as 3.333 yards.
 
I can work in any arithmetic base without converting from one to
another. I'm 68 years old and I was bought up and taught using
Imperial measures.
 
Steve
 
--
Neural Network Software for Windows http://www.npsnn.com
rickman <gnuarm@gmail.com>: Jul 02 11:34AM -0400

Foxs Mercantile wrote on 7/2/2017 5:31 AM:
>> bases is not a problem. Younger metric people are base 10 only!
 
> Not hardly, people don't think of 10 inches as 0.833 feet nor do
> they think of 10 feet as 3.333 yards.
 
What do they think of feet and yards? To me a yard is *about* a meter and a
foot is 0.3 meters.
 
--
 
Rick C
Mike Coon <gravity@mjcoon.plus.com>: Jul 02 12:13PM +0100

In article <iulglc1c3325tjag53g9f7b1do5o5p6f1f@4ax.com>,
jeffl@cruzio.com says...
> to see a difference between what's going in and what's going out on
> your electron counter (coulomb meter).
 
> Note: This is 100% pure BS, but it sounds logical.
 
Are you training to be a politician? ;-)
 
Mike.
Phil Allison <pallison49@gmail.com>: Jul 01 08:50PM -0700


> > ** Yet again you have posted something completely mysterious about purchasing components. Doing that does not make you sound one bit clever, rather it does the exact opposite.
 
> > Makes YOU look a real idiot.
 
> Boy you love to spout on matters you truly know jack about.
 
** YOU need to explain your self referencing posts cos they make no sense.
 
 
> Jim is right about you,
 
 
** You should explain that remark too.
 
 
> I won't waste time explaining what I said.
 
** That is a blatant lie.
 
You are being mysterious and deceitful.
 
 
 
> > Luckily for you, Google does not seem to have the previous SED
> > thread available.
 
> Lol. My best guess is you made some bonkers accusations
 
** Your " best guess" is completely wrong.
 
 
The gist of your posts on SED was not to fuss over counterfeit Motorola power transistors - lots of products are cloned and faked by others and sold as genuine. Get used to it was the message.
 
I complained that that was a totally crazy messageonly someone INVOLVERD in the criminal trade would put forward in defence of what they were doing.
 
You then posted similar paranoid crapology to that appearing below:
 
--------------------------------------------------------------
 
and I didn't waste any time discussing them with you. You are, some of the time, truly a loony. This notion of yours that I'm some master criminal is one more piece of your lunacy. And I have zero interest in what your reply is. Good bye, rejoin the nutjob filter. I really should leave you there.
 
---------------------------------------------------------------
 
 
Crazy stuff, completely nuts.
 
 
 
.... Phil
Phil Allison <pallison49@gmail.com>: Jul 01 09:21PM -0700

Ian Field wrote:
 
-----------------------------------
 
> thousands of state of the art CPUs that turned out to be all package and no
> silicon.
 
>----------------------------------------------
 
 
** My colleague Rod Elliot ( of ESP ) and I spent considerable time investigating numerous fake transistors that were being sold over the counter here in Australia. Initially it was Motorola MJ15003s & MJ15004s used in amplifier kits and sold folk doing repairs.
 
I first saw examples back in 1980 from "Dick Smith Electronics" - who sold thousands of counterfeits that way - some to me. And again in 2000, purchased from a different source. The internet was put to good use by me and a friend to embarrass the company out of continuing.
 
DSE is no longer in business and so too are a couple of others that imported and sold fakes - however they are still on open sale here and all over eBay.
 
This article was prepared from information gleaned by myself and Rod.
 
http://sound.whsites.net/fake/counterfeit-p1.htm
 
http://sound.whsites.net/counterfeit.htm
 
For a long time now, it has not been safe to buy power BJTs from ANY small supplier or on line dealer - cos their stock consists MOSTLY of fakes.
 
 
 
..... Phil
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Digest for sci.electronics.repair@googlegroups.com - 25 updates in 5 topics

Jeff Liebermann <jeffl@cruzio.com>: Jul 01 09:50AM -0700

On Fri, 30 Jun 2017 11:51:45 -0500, Jon Elson <elson@pico-systems.com>
wrote:
 
>> shrugged.
 
>Karl Rove? Gee, this must be a REALLY old article!
>Jon
 
Karl Rove was Deputy Chief of Staff under GW Bush from 2001 - 2007.
Andrew Card was Chief of Staff during this period.
--
Jeff Liebermann jeffl@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558
Jeff Liebermann <jeffl@cruzio.com>: Jul 01 10:12AM -0700

>internetometer.
 
>I just watched the wires bulge as a cluster of electrons from September
>of 2014 finally made their way into my modem. :)
 
That's possible. The drift velocity of an electron through a copper
wire is not the speed of light, but rather about 80 cm/hr (0.20
mm/sec).
<https://www.quora.com/What-is-the-speed-of-electric-current>
 
Now, if you need something to worry about, please note that the worlds
supply of available white space is limited and finite. At the present
consumption rate, I predict that we will run out of white space very
soon when allthewordswillruntogether.
 
 
 
--
Jeff Liebermann jeffl@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558
Cursitor Doom <curd@notformail.com>: Jul 01 09:26PM

On Sat, 01 Jul 2017 00:53:40 -0400, oldschool wrote:
 
> message to delay leaving my computer for 30 million nano-light years,
> and the internet is operating at less than 4% on the world wide
> internetometer.
 
There is no shortage of electrons. Every single stinking electron I get
from the power company gets sent right back to them. Every fucking one.
I've counted them. Same for every other customer.
Yet they still charge me as if I'd used them up! It's a rip off.
rickman <gnuarm@gmail.com>: Jul 01 08:33PM -0400

Cursitor Doom wrote on 7/1/2017 5:26 PM:
> from the power company gets sent right back to them. Every fucking one.
> I've counted them. Same for every other customer.
> Yet they still charge me as if I'd used them up! It's a rip off.
 
You must have a rather poor power company. Mine only charges me for the
shipping and handling. I get the return shipping for free in fact, well,
"ground" shipping anyway. ;)
 
--
 
Rick C
Jeff Liebermann <jeffl@cruzio.com>: Jul 01 07:24PM -0700

On Sat, 1 Jul 2017 21:26:57 -0000 (UTC), Cursitor Doom
>from the power company gets sent right back to them. Every fucking one.
>I've counted them. Same for every other customer.
>Yet they still charge me as if I'd used them up! It's a rip off.
 
That can't be right. The power company sends you electrons at some
energy level. Your home appliances consume some of that energy.
Therefore, the electrons going back to the power company must have
less energy, which means they either move slower, or you're returning
fewer electrons. If you send back everything that you receive, where
is the energy needed to run your toys coming from? You should be able
to see a difference between what's going in and what's going out on
your electron counter (coulomb meter).
 
Note: This is 100% pure BS, but it sounds logical.
 
--
Jeff Liebermann jeffl@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558
stallaksen@gmail.com: Jul 01 06:57PM -0700

I still have this camera.. i'll take everyones tips, thanks all...
 
 
On Saturday, August 28, 1999 at 3:00:00 AM UTC-4, Fez wrote:
John-Del <ohger1s@gmail.com>: Jul 01 10:30AM -0700


> For the small price, I am not gonna make a big deal out of it. I'll just
> have to order some properly made plugs from an American manufacturer,
> and use these worthless plugs for a conversation piece.
 
 
 
I've also seen them on X-Box headsets now that I think about it.
John-Del <ohger1s@gmail.com>: Jul 01 10:51AM -0700

On Saturday, July 1, 2017 at 6:31:22 AM UTC-4, Trevor Wilson wrote:
 
 
> **"American manufacturer"? Don't tell me you've swallowed the Trump
> Kool-Aide?
 
Trump is NOT talking about replacing every imported item with a domestic one. That's the leftist media's binary spin on this: If Trump talks about reducing the trade deficit, then it means he wants to stop *all* imports and make everything domestically. Not happening - not his plan.
 
Americans don't have any problem buying German, British, Canadian, Swiss etc. imports as we know they aren't built strictly for price. While the Chinese are not genetically predisposed to making junk, a very large portion of Chinese sourced pieces/parts are indeed crap. There are however many good parts sourced from China, it's just not the norm from what I've seen. Japan had the same (deserved) reputation until they started making better quality stuff. Americans no longer have any problem buying a Japanese sourced component as we perceive them to be of higher quality that Chinese stuff.
 
 
> You guys really have to get over this 'inch' bullshit. Everyone on the
> planet, save a tiny 5% of the planetary population has embraced the
> Metric system. Hell, engineers and scientists in the US use it.
 
Americans (and I'm guessing the Brits) are "bilingual" when it comes to measurements (except the old guys like olds...@tubes.com!). We use both interchangeably and seamlessly. It's not an issue here.
 
OTOH, we call the plug in question 3.5mm as well. I didn't realize they're also referred to as 1/8 inch.
rickman <gnuarm@gmail.com>: Jul 01 02:32PM -0400

John-Del wrote on 7/1/2017 1:51 PM:
>> Kool-Aide?
 
> Trump is NOT talking about replacing every imported item with a domestic one. That's the leftist media's binary spin on this: If Trump talks about reducing the trade deficit, then it means he wants to stop *all* imports and make everything domestically. Not happening - not his plan.
 
> Americans don't have any problem buying German, British, Canadian, Swiss etc. imports as we know they aren't built strictly for price. While the Chinese are not genetically predisposed to making junk, a very large portion of Chinese sourced pieces/parts are indeed crap. There are however many good parts sourced from China, it's just not the norm from what I've seen.
 
I'll share with you a secret. If we didn't buy "crap" from China, they
wouldn't keep sending it!!! They only make what people buy, nothing more,
nothing less.
 
 
> Japan had the same (deserved) reputation until they started making better quality stuff. Americans no longer have any problem buying a Japanese sourced component as we perceive them to be of higher quality that Chinese stuff.
 
Many times we perceive Japanese goods to be superior to US made goods. I
seem to recall they nearly (or maybe did) bankrupt the US automakers at one
point, not to mention many other goods they seem to excel at making.
 
 
>> planet, save a tiny 5% of the planetary population has embraced the
>> Metric system. Hell, engineers and scientists in the US use it.
 
> Americans (and I'm guessing the Brits) are "bilingual" when it comes to measurements (except the old guys like olds...@tubes.com!). We use both interchangeably and seamlessly. It's not an issue here.
 
Hardly. *Some* engineers use both systems. I recall all of the mechanical
designs at a company I worked for were in inches. I asked about that one
time and they made is clear they had no reason to change.
 
The average guy on the street has no idea how large a gram is or a ml or a
mm or a hectare, even though they are printed on the sides of the things we
buy (well, maybe not the hectare).
 
 
> OTOH, we call the plug in question 3.5mm as well. I didn't realize they're also referred to as 1/8 inch.
 
They've been 1/8 inch since they appeared on the sides of Japanese
transistor radios in the 60's.
 
I'm actually surprised oldschool didn't spot the three way plug. They have
come in mono and stereo for a long time. I expect he can still use the
plugs he got as stereo plugs. He just needs to short together two sections.
I guess he'd have to figure out which two sections though.
 
--
 
Rick C
Ralph Mowery <rmowery28146@earthlink.net>: Jul 01 02:37PM -0400

In article <b2bbc031-f775-49d7-a936-55f18beb6f72@googlegroups.com>,
ohger1s@gmail.com says...
 
> On Saturday, July 1, 2017 at 6:31:22 AM UTC-4, Trevor Wilson wrote:
 
Trump is NOT talking about replacing every imported item with a domestic
one. That's the leftist media's binary spin on this: If Trump talks
about reducing the trade deficit, then it means he wants to stop *all*
imports and make everything domestically. Not happening - not his plan.
 
> Americans don't have any problem buying German, British, Canadian, Swiss etc. imports as we know they aren't built strictly for price. While the Chinese are not genetically predisposed to making junk, a very large portion of Chinese sourced pieces/parts are indeed crap. There are however many good parts sourced from China, it's just not the norm from what I've seen. Japan had the same (deserved) reputation
until they started making better quality stuff. Americans no longer have any problem buying a Japanese sourced component as we perceive them to be of higher quality that Chinese stuff.
 
I don't care where an item is made. I buy for quality, or at least what
I think is quality in my price range. Never could get an American car
to last. Started buying the Japan cars around 1980. Did buy a Ford in
1995 and it turned out that model was a piece of junk. Went back to the
Japan ones.
 
Around 1972 I took a tour of the local TV station. They had just gotten
in a few Japan Cameras about 6 months before and were bragging on them
and how they were going to get more as the money allowed for it.
 
China puts out lots of junk at junk prices. However I have found some
of their electronics to be every bit as good as the Japan ones that have
been highly rated for many years. Isn't China where many of the Apple
item are made ?
 
If the American companies would quit paying the higher ups in a company
large ammouts of money and put it into better quality I am sure lots of
jobs would come back to America. Really looks bad to go to a large
company and see a row of almost new high dollar cars for the wheels, and
the others old used cars for the workers.
"jfeng@my-deja.com" <jfeng@my-deja.com>: Jul 01 12:15PM -0700

On Saturday, July 1, 2017 at 3:31:22 AM UTC-7, Trevor Wilson wrote:
> > and use these worthless plugs for a conversation piece.
 
> **"American manufacturer"? Don't tell me you've swallowed the Trump
> Kool-Aide?
By their actions, Donald and Ivanka clearly believe in the superiority of things made in China, since that is where their ties, shoes, and other things are manufactured. The Donald may promote American manufacturing, but that is as credible as anything else that comes out of his mouth.
 
He has all the honor of someone who stole the family crest of someone else (only modified by removing the Latin word "Integritas" and replacing it with "Trump"), and who tried to convince people that his self-created Time magazine cover was genuine. It is reasonable to assert that all the Trumpettes are just as truthful, honorable and honest.
"jfeng@my-deja.com" <jfeng@my-deja.com>: Jul 01 12:28PM -0700

On Saturday, July 1, 2017 at 10:51:53 AM UTC-7, John-Del wrote:
> Americans don't have any problem buying German, British, Canadian, Swiss etc.
> imports as we know they aren't built strictly for price.
Despite NAFTA, Americans cannot easily purchase cheaper drugs from Canada because it would make it harder for the drug companies to raise their prices.
 
> Americans (and I'm guessing the Brits) are "bilingual" when it comes to
> measurements (except the old guys like olds...@tubes.com!). We use both
> interchangeably and seamlessly. It's not an issue here.
There are lots of stories about problems caused by confusion between metric and Imperial measures. Two that come to mind are the spy satellite that pointed up to the sky, and the Mars probe that crashed.
 
I think the UK is metricated. The older Imperial units appear when they are being deliberately nostalgic, like in historical dramas. The last I heard, Ireland (not a part of a UK) had an amusing mixture where speed limits were in mph and road distances were in km.
Ralph Mowery <rmowery28146@earthlink.net>: Jul 01 03:43PM -0400

In article <oj8pjv$vro$1@dont-email.me>, gnuarm@gmail.com says...
 
> Americans (and I'm guessing the Brits) are "bilingual" when it comes
to measurements (except the old guys like olds...@tubes.com!). We use
both interchangeably and seamlessly. It's not an issue here.
 
> Hardly. *Some* engineers use both systems. I recall all of the mechanical
> designs at a company I worked for were in inches. I asked about that one
> time and they made is clear they had no reason to change.
 
My son had a Ford that those engineers must have designed. Some bolts
in inches and others were metric.
Ralph Mowery <rmowery28146@earthlink.net>: Jul 01 03:49PM -0400

In article <oj8pjv$vro$1@dont-email.me>, gnuarm@gmail.com says...
 
> Many times we perceive Japanese goods to be superior to US made goods. I
> seem to recall they nearly (or maybe did) bankrupt the US automakers at one
> point, not to mention many other goods they seem to excel at making.
 
Japan did not almost put the American cars out of business, they did it
to their selves by making high priced junk.
"Gareth Magennis" <soundserviceleeds@outlook.com>: Jul 01 10:44PM +0100

"John-Del" wrote in message
news:b2bbc031-f775-49d7-a936-55f18beb6f72@googlegroups.com...
 
On Saturday, July 1, 2017 at 6:31:22 AM UTC-4, Trevor Wilson wrote:
 
 
> **"American manufacturer"? Don't tell me you've swallowed the Trump
> Kool-Aide?
 
Trump is NOT talking about replacing every imported item with a domestic
one. That's the leftist media's binary spin on this: If Trump talks about
reducing the trade deficit, then it means he wants to stop *all* imports and
make everything domestically. Not happening - not his plan.
 
Americans don't have any problem buying German, British, Canadian, Swiss
etc. imports as we know they aren't built strictly for price. While the
Chinese are not genetically predisposed to making junk, a very large portion
of Chinese sourced pieces/parts are indeed crap. There are however many
good parts sourced from China, it's just not the norm from what I've seen.
Japan had the same (deserved) reputation until they started making better
quality stuff. Americans no longer have any problem buying a Japanese
sourced component as we perceive them to be of higher quality that Chinese
stuff.
 
 
> You guys really have to get over this 'inch' bullshit. Everyone on the
> planet, save a tiny 5% of the planetary population has embraced the
> Metric system. Hell, engineers and scientists in the US use it.
 
Americans (and I'm guessing the Brits) are "bilingual" when it comes to
measurements (except the old guys like olds...@tubes.com!). We use both
interchangeably and seamlessly. It's not an issue here.
 
OTOH, we call the plug in question 3.5mm as well. I didn't realize they're
also referred to as 1/8 inch.
 
 
**********************************************************************************
 
 
 
Us "Brits" tend to call a 1/4 inch jack plug a quarter inch jack plug, for
historical reasons.
 
The 3.5mm jack plug is a more recent addition to our language, and is called
a 3.5mm jack plug.
I have never heard it called an 1/8 inch plug.
 
 
The problem as I see it with the old style inches system is that it is in
discrete steps, whereas the Metric system is as accurate as you want it to
be.
 
I regularly measure things with metric Vernier calipers. This would give a
result of 3.5mm on a 3.5mm jack plug, perhaps 3.51 or whatever, if it wasn't
quite the right size.
3.5mm is somewhere between 1/8 inch and 9/64ths using the Imperial scale.
I think it is actually closer to 9/64ths.
 
I'm not sure how you can deal with this - why would you not just measure in
mm, rather than say it's a bit more than 1/8 but not quite 9/64ths?
 
 
 
Gareth.
etpm@whidbey.com: Jul 01 03:06PM -0700

On Sat, 1 Jul 2017 14:37:41 -0400, Ralph Mowery
>jobs would come back to America. Really looks bad to go to a large
>company and see a row of almost new high dollar cars for the wheels, and
>the others old used cars for the workers.
This whole business of imported goods being junk has been going on for
a long time. When the USA was still a British colony all sorts of
goods were made here and exported to Britain. They were considered to
be of lesser quality than British made goods. And they mostly were.
This is because for the most part the goods were made to order. And
the British folks ordering the goods were mostly (I seem to have the
word "most" stuck in my head) interested in low prices. After the USA
was formed the cheap goods were still produced to order and most
(Gawd! there's that word again!) production was still owned by the
British. After the USA started to become industrialized certain
technolgies were prohibited from being exported to the USA from
Britain. Eventually the USA became industrialized, we developed our
own machine tools, the British lost control of our manufacturing, we
marketed our own stuff, and produced goods for internal as well as
external consumption, and quality improved greatly. Fast forward to
the period just after WW2 and the Japanese were in a similar
situation. Their country was devasted and they needed money. Many USA
companies started having cheap goods produced in Japan. These goods
weren't supposed to be of high quality, the USA buyers just wanted
cheap and the quality specs of the goods were lower than domestically
produced goods. But just like people everywhere in the world the
Japanese have the same intrinsic smarts and abilities and when they
could they started to produce their own stuff to their own desired
quality. The same thing happened with Taiwan. And Korea (Korea doing
to Japan what Japan did to us). Now China. India will probably be
next, at least when it comes to heavy industry. Machine tools made in
India are starting to come on the export market. As of now they are
not so good. But they are cheap. Computer controlled machine tools
from India still mostly have Japanese controls. But this will change
soon.
Eric
Jon Elson <elson@pico-systems.com>: Jul 01 07:14PM -0500


> That was a mistake. They are NOT stereo, they are THREE CHANNEL. The tip
> of the plug has THREE contacts, (plus the grounded base). What the heck
> are they for? I have never seen any 3 prong 1/8" jacks on anything.
They are for cell phone headsets and other connections to a phone (like a
car). Left and right audio out, and microphone. Blame Apple.
 
Jon
Jeff Liebermann <jeffl@cruzio.com>: Jul 01 10:34AM -0700

>from somewhere around the 1970s. The saw works fine, and is built much
>better than the new ones which have a lot of plastic parts. But it has
>one drawback, no variable speed control.
 
The motor is probably the universal series wound type, which works
nicely with a triac type speed control:
<https://en.wikipedia.org/wiki/Universal_motor#Speed_control>
Make sure your unspecified model saw motor does not exceed the current
ratings of your unspecified light dimmer or speed control. You're not
going to hurt the motor doing this, but you might blow up the speed
controller if it's under-rated.
 
>I've seen schematics for motor speed controllers, but I already have too
>many projects to do.
 
Right. There's never enough time to do it correctly, but always
enough time to clean up the mess you create after it doesn't work.
 
>dimmer to control the speed? I would use a dimmer rated at 600W or
>greater. (The saw runs on my 300W inverter in my car, so it's not a huge
>power user).
 
Ummm... why do you have a scrolling saw in your car?
 
If you have a clamp on amps guesser, measure the peak current of the
motor. The light dimmer is probably ok for the motor running current,
but I would be concerned about the higher starting current. Check the
nameplate on the motor for real numbers.
 
>wood, I cant be holding a trigger switch. That's why a light dimmer
>seems most useful. I can just dial the speed I want and dont need to
>touch the dimmer unless I want to change the speed.
 
No. Too small.
 
>Plus a dimmer could just be mounted in an electrical box, with a
>receptacle next to it, and I can just plug the saw into that box.
 
Good idea. When the light dimmer explodes, the metal box will prevent
the schrapnel from doing much damage.
 
>But I am asking about this because I am a little concerned that the
>dimmer could be hard on the motor, since these dimmers are made for
>lighting, not motors......
 
The dimmer will produce harmonics of the 60Hz AC which might need to
be dissipated by the motor. However, the harmonic content is small
and should not cause a problem.
 
I think buying one of these might be a better idea:
<https://www.harborfreight.com/router-speed-control-43060.html>
<http://www.ebay.com/itm/382139367809>
 
--
Jeff Liebermann jeffl@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558
Clifford Heath <no.spam@please.net>: Jul 02 09:00AM +1000

On 02/07/17 03:34, Jeff Liebermann wrote:
 
> The motor is probably the universal series wound type, which works
> nicely with a triac type speed control:
> <https://en.wikipedia.org/wiki/Universal_motor#Speed_control>
 
A dimmer-style control provides poor low-speed running. It might not
matter for a scroll-saw, which doesn't need to operate at very low
speeds.
 
However, the same circuit made with an SCR can work. Instead of
putting the motor in the anode leg, put it in th cathode leg (the
side the gate is on). Reverse EMF gives you very good speed regulation
down to very low speeds.
 
I don't know if it's possible to do the same thing with a Triac circuit.
 
Clifford Heath.
"Ian Field" <gangprobing.alien1@virginmedia.com>: Jul 01 07:29PM +0100

<pfjw@aol.com> wrote in message
news:1d4be5ce-584f-4a77-9d7a-029a660aa80d@googlegroups.com...
> other stuff), but we do not intend to dim those.
 
> NOTE: some cheap LED lamps are very noisy in the RF range. VERY noisy,
> approaching that of an unshielded ignition transformer (oil burner).
 
Most of the cheap LED bulbs I've cracked open were wattless dropper - they
absorb a small amount of mains borne crap.
"Ian Field" <gangprobing.alien1@virginmedia.com>: Jul 01 07:32PM +0100

"John-Del" <ohger1s@gmail.com> wrote in message
news:044164d5-0fd2-4089-acd0-5e4e838da734@googlegroups.com...
 
> Okay, that's two that think they're right and General Electric is wrong.
> Not sure if that constitutes a consensus or not...
 
> Hehehe......
 
AFAIK: GE are still making jet engines - I think it was probably
Westinghouse that had to give it up as a bad job.
"Ian Field" <gangprobing.alien1@virginmedia.com>: Jul 01 07:38PM +0100

<pfjw@aol.com> wrote in message
news:64fc4040-404f-404b-b014-e725facfafc6@googlegroups.com...
> The rest have no opinion.
 
> And the US is by no means any different than the rest of the world in its
> beliefs.
 
In the late 30s - the only Americans that GAF about the European war; wanted
to join the Axis.
 
The Jap attack on pearl just after Japan became the 3rd member of the Axis
is the only thing that changed their mind.
 
Just before that; America was doing military excercises in preparation for
an attack on parts of the British Empire.
"Ian Field" <gangprobing.alien1@virginmedia.com>: Jul 01 07:40PM +0100

<tabbypurr@gmail.com> wrote in message
news:57c0918e-e2e0-496a-9645-65b4d6745a86@googlegroups.com...
 
>> Over to you...........
 
>> .... Phil
 
> Sometimes I'm not sure which planet you're from.
 
There's ongoing debate as to whether it even has a
sky...........................
"Ian Field" <gangprobing.alien1@virginmedia.com>: Jul 01 07:46PM +0100

<tabbypurr@gmail.com> wrote in message
news:57c0918e-e2e0-496a-9645-65b4d6745a86@googlegroups.com...
 
> Component procurement in what I do is however utterly different to how
> probably all of you get parts, and I suspect a large misunderstanding to
> have arisen from that.
 
Counterfeiting is less jail time than drug running - electronic component
isn't the only thing affected.
 
Pharmaceuticals, cosmetics, fashion, electronics - I can't think of anything
that isn't.
 
A few years back; a reputable supplier got lumbered with hundreds of
thousands of state of the art CPUs that turned out to be all package and no
silicon.
tabbypurr@gmail.com: Jul 01 03:09PM -0700

On Saturday, 1 July 2017 04:00:50 UTC+1, Phil Allison wrote:
 
> > I see you're being more idiot than I expected.
 
> ** Yet again you have posted something completely mysterious about purchasing components. Doing that does not make you sound one bit clever, rather it does the exact opposite.
 
> Makes YOU look a real idiot.
 
Boy you love to spout on matters you truly know jack about.
Jim is right about you, I won't waste time explaining what I said.
 
 
> FYI:
 
> Luckily for you, Google does not seem to have the previous SED thread available.
 
Lol. My best guess is you made some bonkers accusations and I didn't waste any time discussing them with you. You are, some of the time, truly a loony. This notion of yours that I'm some master criminal is one more piece of your lunacy. And I have zero interest in what your reply is. Good bye, rejoin the nutjob filter. I really should leave you there.
 
 
NT
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Digest for sci.electronics.repair@googlegroups.com - 25 updates in 4 topics

oldschool@tubes.com: Jul 01 12:42AM -0400

Most of the new scroll saws have variable speed. I have an old Delta
from somewhere around the 1970s. The saw works fine, and is built much
better than the new ones which have a lot of plastic parts. But it has
one drawback, no variable speed control.
 
I've seen schematics for motor speed controllers, but I already have too
many projects to do. Is there any reason I can not use a regular light
dimmer to control the speed? I would use a dimmer rated at 600W or
greater. (The saw runs on my 300W inverter in my car, so it's not a huge
power user).
 
I also have some old electric drills that have bad motors or stripped
gears, which have variable speed switches. I suppose I could modify one
of them for this use too, but since I need two hands for cutting the
wood, I cant be holding a trigger switch. That's why a light dimmer
seems most useful. I can just dial the speed I want and dont need to
touch the dimmer unless I want to change the speed.
 
Plus a dimmer could just be mounted in an electrical box, with a
receptacle next to it, and I can just plug the saw into that box.
 
But I am asking about this because I am a little concerned that the
dimmer could be hard on the motor, since these dimmers are made for
lighting, not motors......
"pfjw@aol.com" <pfjw@aol.com>: Jul 01 04:02AM -0700

A resistance dimmer (gets hot) might work. Some triac dimmers might work. Look for a variable fan speed control. That would be the ticket. Noting all the while that the scroll-saw motor is not designed for variable speed and will likely heat up in short order. Many motors 'attempt' to draw as much current as they need to operate - and why it is that motor-type items hate brownouts.
 
Peter Wieck
Melrose Park, PA
Ralph Mowery <rmowery28146@earthlink.net>: Jul 01 10:50AM -0400

In article <203d707e-b80b-43d6-85f2-36d0e4cd4b45@googlegroups.com>,
pfjw@aol.com says...
 
> A resistance dimmer (gets hot) might work. Some triac dimmers might work. Look for a variable fan speed control. That would be the ticket. Noting all the while that the scroll-saw motor is not designed for variable speed and will likely heat up in short order. Many motors 'attempt' to draw as much current as they need to operate - and why it is that motor-type items hate brownouts.
 
> Peter Wieck
> Melrose Park, PA
 
Speaking of heat, many motors have an internal fan on the shaft. If ran
too slow that fan will not pull in enough air and the motor will
overheat.
 
Company I worked for burnt up 2 motors of about 100 HP running it on an
inverter to slow it down before I looked into it. Put an external
powered fan on the motor and all was well.
oldschool@tubes.com: Jul 01 04:04AM -0400

I needed to replace a 1/8" stereo plug on a cord. I found on ebay a pack
of three 1/8" stereo plugs from China, for about $2. I dont normally
order from China, but for the price and since I was in no hurry for
them, I bought them.
 
That was a mistake. They are NOT stereo, they are THREE CHANNEL. The tip
of the plug has THREE contacts, (plus the grounded base). What the heck
are they for? I have never seen any 3 prong 1/8" jacks on anything.
 
Yea, I could just ground the uppermost terminal so it acts as a stereo
plug, but it gets worse. Under the shell, I found a solder on ground
contact. But none of the three conductors have any contacts attached to
them. There are just three pieces of "rod" sticking out the back, with
the insulation in between. I would have to wrap the wires around them,
and solder them and by the time I manage to do all that in that tiny
space, I'd probably melt the insulation between the sections and unless
they wires were hair thin, they would short against the ground terminal.
 
For the small price, I am not gonna make a big deal out of it. I'll just
have to order some properly made plugs from an American manufacturer,
and use these worthless plugs for a conversation piece.
John-Del <ohger1s@gmail.com>: Jul 01 02:45AM -0700


> For the small price, I am not gonna make a big deal out of it. I'll just
> have to order some properly made plugs from an American manufacturer,
> and use these worthless plugs for a conversation piece.
 
 
 
A link would be nice, but I've seen plugs like what you're describing used for plug in keyboards, controllers, and even small power supplies - anything that needs a quick disconnect.
"Gareth Magennis" <soundserviceleeds@outlook.com>: Jul 01 10:50AM +0100

wrote in message news:i3lelc5gojpe7o9ttiepp8oc3feho047nt@4ax.com...
 
I needed to replace a 1/8" stereo plug on a cord. I found on ebay a pack
of three 1/8" stereo plugs from China, for about $2. I dont normally
order from China, but for the price and since I was in no hurry for
them, I bought them.
 
That was a mistake. They are NOT stereo, they are THREE CHANNEL. The tip
of the plug has THREE contacts, (plus the grounded base). What the heck
are they for? I have never seen any 3 prong 1/8" jacks on anything.
 
Yea, I could just ground the uppermost terminal so it acts as a stereo
plug, but it gets worse. Under the shell, I found a solder on ground
contact. But none of the three conductors have any contacts attached to
them. There are just three pieces of "rod" sticking out the back, with
the insulation in between. I would have to wrap the wires around them,
and solder them and by the time I manage to do all that in that tiny
space, I'd probably melt the insulation between the sections and unless
they wires were hair thin, they would short against the ground terminal.
 
For the small price, I am not gonna make a big deal out of it. I'll just
have to order some properly made plugs from an American manufacturer,
and use these worthless plugs for a conversation piece.
 
 
 
 
**********************************************************
 
 
 
You find these on things like headsets and mobile phones where you have
stereo audio plus a microphone down the same cable.
 
 
Gareth.
Stephen Wolstenholme <steve@easynn.com>: Jul 01 11:20AM +0100


>For the small price, I am not gonna make a big deal out of it. I'll just
>have to order some properly made plugs from an American manufacturer,
>and use these worthless plugs for a conversation piece.
 
My Samsung photo mobile has a plug like that for earphone and
microphone made before USB became standard.
 
Steve
 
--
Neural Network Software for Windows http://www.npsnn.com
Trevor Wilson <trevor@SPAMBLOCKrageaudio.com.au>: Jul 01 08:31PM +1000


> That was a mistake. They are NOT stereo, they are THREE CHANNEL. The tip
> of the plug has THREE contacts, (plus the grounded base). What the heck
> are they for? I have never seen any 3 prong 1/8" jacks on anything.
 
**They are used for a wide variety of things. One is for two stereo
channels and one video.
 
 
> For the small price, I am not gonna make a big deal out of it. I'll just
> have to order some properly made plugs from an American manufacturer,
> and use these worthless plugs for a conversation piece.
 
**"American manufacturer"? Don't tell me you've swallowed the Trump
Kool-Aide? I doubt that 3.5mm jack plugs were ever manufactured in the
US. If they were, it was likely before the early 1960s. If want REAL
quality, then look at Neutrik. Best 3.5mm jack plugs in the business.
You guys really have to get over this 'inch' bullshit. Everyone on the
planet, save a tiny 5% of the planetary population has embraced the
Metric system. Hell, engineers and scientists in the US use it.
 
 
 
--
Trevor Wilson
www.rageaudio.com.au
Andy Burns <usenet@andyburns.uk>: Jul 01 11:58AM +0100


> That was a mistake. They are NOT stereo, they are THREE CHANNEL. The tip
> of the plug has THREE contacts, (plus the grounded base). What the heck
> are they for? I have never seen any 3 prong 1/8" jacks on anything.
 
You seem to have bought TRRS rather than TRS plugs, mobile phones often
use them for stereo headsets with mic (and sometimes answer/end call
buttons, or FF/REW buttons)
Jon Elson <elson@pico-systems.com>: Jun 30 11:51AM -0500


> Confronted with the report, White House Chief of Staff Karl Rove just
> shrugged.
 
Karl Rove? Gee, this must be a REALLY old article!
 
Jon
"pfjw@aol.com" <pfjw@aol.com>: Jun 30 10:02AM -0700

On Friday, June 30, 2017 at 12:51:53 PM UTC-4, Jon Elson wrote:
> > shrugged.
 
> Karl Rove? Gee, this must be a REALLY old article!
 
> Jon
 
Back then,we just needed a few "nattering nabobs of negativism" to set things right.
 
Would that it were so simple today!
 
Peter Wieck
Melrose Park, PA
oldschool@tubes.com: Jul 01 12:53AM -0400

On Fri, 30 Jun 2017 11:51:45 -0500, Jon Elson <elson@pico-systems.com>
wrote:
 
>> shrugged.
 
>Karl Rove? Gee, this must be a REALLY old article!
 
>Jon
 
Yep, it's old, but that is because the shortage of electrons caused the
message to delay leaving my computer for 30 million nano-light years,
and the internet is operating at less than 4% on the world wide
internetometer.
 
I just watched the wires bulge as a cluster of electrons from September
of 2014 finally made their way into my modem. :)
"Ian Field" <gangprobing.alien1@virginmedia.com>: Jun 30 06:59PM +0100

<pfjw@aol.com> wrote in message
news:f77e28fb-0aa9-4f70-aa22-1058f708a4c9@googlegroups.com...
> https://www.1000bulbs.com/category/dimmable-cfl-compact-fluorescents/
 
> They exist, our local Home Depot stocks them. Personally, I do not use
> them. If I need dimming, I use an LED.
 
Some LED bulbs are switch mode, usually flyback AFAICT. They are pretty much
the same as CFLs on a triac dimmer.
 
Most cheaper LED bulbs are wattless-dropper - I haven't bothered trying any
on a dimmer.
 
I've seen data sheets for PFC front end CFL and LED driver chips - but no
products on the shelves so far.
"pfjw@aol.com" <pfjw@aol.com>: Jun 30 12:00PM -0700

On Friday, June 30, 2017 at 2:00:04 PM UTC-4, Ian Field wrote:
 
> Some LED bulbs are switch mode, usually flyback AFAICT. They are pretty much
> the same as CFLs on a triac dimmer.
 
http://creebulb.com/bulbfinder
 
We use Cree lamps where we need dimming, and in general if replacements. We still have some few legacy LED lamps in place (stuff that came-with other stuff), but we do not intend to dim those.
 
NOTE: some cheap LED lamps are very noisy in the RF range. VERY noisy, approaching that of an unshielded ignition transformer (oil burner).
 
Peter Wieck
Melrose Park, PA
John-Del <ohger1s@gmail.com>: Jun 30 12:49PM -0700


> > GE says your wrong Phil.
 
> Phil certainly has his problems but he's right on this one.
 
> NT
 
Okay, that's two that think they're right and General Electric is wrong. Not sure if that constitutes a consensus or not...
 
Hehehe......
"pfjw@aol.com" <pfjw@aol.com>: Jun 30 01:22PM -0700

When dealing with closely held beliefs, revealed religion and pronouncements from burning bushes, only war will determine what is 'truth' - and only insofar as the winner writes the history books.
 
Keep in mind the 'simple truth' of Evolution:
 
In the United States:
 
19% believe in Evolution.
34% believe in pure creationism.
25% believe in 'directed evolution'.
The rest have no opinion.
 
And the US is by no means any different than the rest of the world in its beliefs.
 
So, something as esoteric as lamp filaments... you get the picture.
 
Peter Wieck
Melrose Park, PA
John Robertson <spam@flippers.com>: Jun 30 02:11PM -0700


> So, something as esoteric as lamp filaments... you get the picture.
 
> Peter Wieck
> Melrose Park, PA
 
Make filaments GREAT again!
 
(ducking)
 
John
tabbypurr@gmail.com: Jun 30 02:24PM -0700

On Friday, 30 June 2017 19:00:04 UTC+1, Ian Field wrote:
> on a dimmer.
 
> I've seen data sheets for PFC front end CFL and LED driver chips - but no
> products on the shelves so far.
 
CR supplies used in some LEDs burn up on dimmers or MSW inverters. The voltage steps cause current pulses that increase resistor P_diss massively. They dim perfectly on variacs - but probably no-one uses variac dimmers now.
 
I suppose in principle a mosfet dimmer could switch off & on at the same voltage each side of the peak, and thus work ok with CR PSU LEDs, but I've not heard of such dimmers - not been looking for any dimmers for years though.
 
 
NT
tabbypurr@gmail.com: Jun 30 02:26PM -0700

On Friday, 30 June 2017 20:50:02 UTC+1, John-Del wrote:
 
> > Phil certainly has his problems but he's right on this one.
 
> Okay, that's two that think they're right and General Electric is wrong. Not sure if that constitutes a consensus or not...
 
> Hehehe......
 
way more than 2. If you've not met promotional literature that makes claims that don't add up, I don't know where you've been hiding.
 
 
NT
Phil Allison <pallison49@gmail.com>: Jun 30 05:14PM -0700

tabb...@gmail.com wrote:
 
-------------------------------
 
 
> Sometimes I'm not sure which planet you're from. I do not encourage,
> agree with or assist criminals who fake parts or deal in fake parts.
> Never have.
 
** Your posts on SED a few year back re fake Motorola power BJTs were bizarre.
 
 
> Component procurement in what I do is however utterly different to
> how probably all of you get parts,
 
** What the hell does *that* mean ???
 
Thornton is definitely "covering up" here.
 
If Google has it, I will repost what NT said on SED.
 
 
.... Phil
Phil Allison <pallison49@gmail.com>: Jun 30 05:24PM -0700

tabb...@gmail.com wrote:
 
------------------------------
 
 
> way more than 2. If you've not met promotional literature that makes
> claims that don't add up, I don't know where you've been hiding.
 
** And that is all it is - a *blurb* written hastily by some anonymous staffer using half baked information and expressed carelessly.
 
Problem is, the internet preseves it indefinitely when it once would have been consigned to the round filing cabinet.
 
Next Google's " finds needles in a haystacks " search algorithm homes in on it cos it contain a key term.
 
Then some dopey Google Monkey treats it like the word of god.
 
 
..... Phil
tabbypurr@gmail.com: Jun 30 07:41PM -0700

On Saturday, 1 July 2017 01:14:06 UTC+1, Phil Allison wrote:
 
> Thornton is definitely "covering up" here.
 
> If Google has it, I will repost what NT said on SED.
 
> .... Phil
 
I see you're being more idiot than I expected.
Phil Allison <pallison49@gmail.com>: Jun 30 08:00PM -0700

tabb...@gmail.com wrote:
 
-------------------------------
 
 
> I see you're being more idiot than I expected.
 
** Yet again you have posted something completely mysterious about purchasing components. Doing that does not make you sound one bit clever, rather it does the exact opposite.
 
Makes YOU look a real idiot.
 
 
FYI:
 
Luckily for you, Google does not seem to have the previous SED thread available.
 
 
 
.... Phil
rickman <gnuarm@gmail.com>: Jul 01 12:33AM -0400

Phil Allison wrote on 6/30/2017 11:00 PM:
 
>> I see you're being more idiot than I expected.
 
> ** Yet again you have posted something completely mysterious about purchasing components. Doing that does not make you sound one bit clever, rather it does the exact opposite.
 
> Makes YOU look a real idiot.
 
When it comes to looking like a complete idiot, Phil knows what he is
talking about.
 
--
 
Rick C
Phil Allison <pallison49@gmail.com>: Jun 30 09:40PM -0700

Prickman the Netstalker wrote:
 
------------------------------

 
 
** When it comes to looking a complete idiot, the Prickman is an expert.
 
It's his one and only talent.

He practices it regularly too.
 
 
 
.... Phil
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