Digest for sci.electronics.repair@googlegroups.com - 25 updates in 4 topics

Jon Elson <elson@pico-systems.com>: Feb 03 11:49AM -0600


> (my buddy the engineer always buys stick shift cars, I
> actually wondered if he could even drive an automatic for a while but then
> eventually I saw him do it...)
 
Yeah, but he keeps stomping his left foot on the floor where the clutch
pedal is SUPPOSED to be every time he come up to a light or stop sign.
Don't ask how I know about this - 30 years of primarily driving stick.
 
> "LIGHTS" and so forth instead of these icons. In the old windows I usually
> used File Manager. I do not need little pictures I know how to read. Take
> your icons and stick them where they are sure not to get a sunburn.
 
Yup, really, how much extra would it cost to have the various panel
appliques made up in the language for where the car is delivered?
 
Some of these stalks by the steering wheel have so many functions now,
there's up-down, pull-push, press the end, turn the end, little slider
switches, and on and on...
 
Jon
Jon Elson <elson@pico-systems.com>: Feb 03 11:55AM -0600

> hardware you are out of luck. If you decompile or otherwise modify our
> software we can sue you and take everything we own from you. That means
> everything folks.
 
Ummm, try running Linux! No EULA at all, you are ENCOURAGED to browse the
source code. The only restriction is you can't improve it and then sell it
woithout releasing the source code. The only licensed software I use
anymore is an electronic CAD package and the annual tax program. Everything
else I do is using open source apps under Linux.
 
Jon
Jeff Liebermann <jeffl@cruzio.com>: Feb 03 10:12AM -0800

On Fri, 03 Feb 2017 11:49:51 -0600, Jon Elson <elson@pico-systems.com>
wrote:
 
 
>Yeah, but he keeps stomping his left foot on the floor where the clutch
>pedal is SUPPOSED to be every time he come up to a light or stop sign.
>Don't ask how I know about this - 30 years of primarily driving stick.
 
I are an engineer (of sorts). All my vehicles have had stick shifts
since about 1970. In the past, it was because stick shifts got better
gas mileage, and were cheaper. I even converted one old vehicle from
automatic to manual (because the junk yard wanted less for the manual
than a rebuild would have cost me for the automatic). Today, it's
purely psychological and maybe a little macho. It doesn't feel like
I'm driving the vehicle unless I control the gearing. Having it done
automatically makes me feel more like I'm a passenger than a driver.
After price, a manual transmission was a mandatory requirement for my
last vehicle. I even overpaid the dealer for it as I knew they were
getting scarce and difficult to find.
 
And yes, I have problems driving an automatic, try to shift in an
automatic, and find my left foot wandering around looking for the
clutch pedal. I don't know how I'll do with a self-driving car.
Probably badly.
 
--
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
Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net>: Feb 03 01:26PM -0500

On 02/03/2017 01:12 PM, Jeff Liebermann wrote:
> After price, a manual transmission was a mandatory requirement for my
> last vehicle. I even overpaid the dealer for it as I knew they were
> getting scarce and difficult to find.
 
In October I bought a brand new 2012 Mustang convertible with the stick
shift. (It had 200 or so miles on it--it had got caught up in the
Takata airbag mess, so the dealer couldn't sell it for ages.) Got a
nice discount too--it wound up being the price of my daughter's Kia
econobox. :)
 
Newer cars are full of surveillance devices, which I cordially dislike.
 
Cheers
 
Phil Hobbs
 
--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC
Optics, Electro-optics, Photonics, Analog Electronics
 
160 North State Road #203
Briarcliff Manor NY 10510
 
hobbs at electrooptical dot net
http://electrooptical.net
Jon Elson <jmelson@wustl.edu>: Feb 03 04:21PM -0600

Jeff Liebermann wrote:
 
> In the past, it was because stick shifts got better
> gas mileage, and were cheaper.
Well, adding more gear ratios and the lock-up torque converter helped the
mileage a bit. Now, I have a hybrid that has a continuously variable
transmission and no torque converter. They use a wet-pack clutch like on a
motorcycle to do the initial start. So, it has all the advantages of a
stick shift, but my family can drive it, too.
 
Jon
Tom Biasi <tombiasi@optonline.net>: Feb 03 11:48AM -0500

On 2/3/2017 10:12 AM, Phil Hobbs wrote:
> On 02/02/2017 09:36 PM, Jeff Liebermann wrote:
>> On Thu, 02 Feb 2017 16:44:53 -0600, oldschool@tubes.com wrote:
...
 
> https://www.youtube.com/watch?v=wiOHhhwnK6k
 
> Cheers
 
> Phil Hobbs
 
A wonderful poem and read very well.
Jeff Liebermann <jeffl@cruzio.com>: Feb 03 09:32AM -0800

On Fri, 3 Feb 2017 10:12:56 -0500, Phil Hobbs
>https://www.youtube.com/watch?v=wiOHhhwnK6k
>Cheers
>Phil Hobbs
 
Thanks, that was good and quite appropriate.
 
While attending college, I lived for a time in a large old house aptly
named "the fire trap". I could hear termites chewing away in the
walls. About 3 years after graduating, I returned to visit the
school, and drove by house. It looked much the same as when I lived
there. The next day, on my way out of town, I drove by again and
found that the house had collapsed in a heap. No wall was left
standing. According to the news, it had fallen down by itself and
without warning, injuring a few students in the process. It's much
like the medieval cathedrals, bridges, and other structures, where the
failure of one tiny arch, will cause the entire structure to collapse.
 
 
In a previous life, I tried to design a "warranty timer" into a
product. Actually, it was suppose to accumulate and display the
amount of time that the unit had been powered on to help establish
maintenance intervals. In previous products, a mechanical
counter-timer was used, but for this version, it was deemed too big
and expensive.
<http://www.alliedelec.com/images/products/Small/70132720.jpg>
I found a company that made an electrochemical equivalent. It was
housed in a glass cylinder, similar to a common 3AG glass fuse. Inside
was some chemical solution. When a few volts of DC was applied,
electrolytic action caused one end to slowly turn dark, thus
indicating the amount of time that the DC was applied. Sorry, but I
couldn't find the vendor or an equivalent online. When the required
maintenance was performed, the indicator would be replaced as it could
not be reset.
 
During the design phase, I liked to joke about installing a 2nd timer
in the product, which would blow it up after a specified operating
life. I even designed a place for it on one of PCB's. I stopped
joking after I found that management was taking me seriously and
discussing such things was how to handle extended warranties. The
device was later removed in a cost reduction exercise, but the
component outline remained in the printed manual, resulting in
numerous embarrassing questions because someone had labeled the part
as a "warranty timer".
 
 
 
 
--
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
clare@snyder.on.ca: Feb 03 01:39PM -0500

On Fri, 03 Feb 2017 09:32:07 -0800, Jeff Liebermann <jeffl@cruzio.com>
wrote:
 
>component outline remained in the printed manual, resulting in
>numerous embarrassing questions because someone had labeled the part
>as a "warranty timer".
Something like a coulometer???
Nick Danger <nick@third.eye.net>: Feb 03 02:08PM -0500

On 2/2/2017 9:13 PM, Jim Mueller wrote:
 
> by electricity which won't be available. Solar cells are also
> semiconductors and the inverters used with them also use semiconductors.
> So, if there is a WW3, don't count on ANYTHING electrical working.
 
 
Seeing as you brought up WW3, for those of you that may not know it, a
new president singlehandedly advanced the Doomsday Clock by 30 seconds
just last week. Heck of a job!
ohger1s@gmail.com: Feb 03 12:15PM -0800

On Friday, February 3, 2017 at 2:08:40 PM UTC-5, Nick Danger wrote:
 
> Seeing as you brought up WW3, for those of you that may not know it, a
> new president singlehandedly advanced the Doomsday Clock by 30 seconds
> just last week. Heck of a job!
 
You probably don't know this, but it's not a *real clock*. It's one of those cardboard affairs that we used to teach our children how to tell time. Some snowflakes have one that they labelled "Doomsday" on it in crayon and they move the hands one way or the other depending on how *they* feel about things.
 
If there were no Muslims and Communists, this would be a pretty peaceful world actually. And speaking of Communists, it was lovely of the outgoing U.S. president to throw the cold war back decades before he left.
 
That's a heck of a job!
"pfjw@aol.com" <pfjw@aol.com>: Feb 03 12:24PM -0800

Lemme See:
 
Austria in 1936.
Chamberlain: Peace in our Time.
 
And we all know how that turned out.
 
Crimea in 2016.
Ukraine in 2017? It is a shooting war to this day, and Ukraine is losing.
tRump: Peace in our time, and let's go to bed.
 
Expect any different? Only this time with Nukes.
 
On some great and glorious day the plain folks of the land will reach their heart's desire at last, and the White House will be adorned by a downright moron.
 
In this world of sin and sorrow there is always something to be thankful for; as for me, I rejoice that I am not a Republican.
 
H. L. Mencken
 
Peter Wieck
Melrose Park, PA
Jim Mueller <wrongname@nospam.com>: Feb 03 09:03PM

On Fri, 03 Feb 2017 13:50:22 +0000, Adrian Tuddenham wrote:
 
 
> One of the factors that is often overlooked is the tolerance of the
> circuit to the various types of wear-out mechanism.
 
>snip
 
True. But the reason to replace them ALL is that if you only replace the
one(s) causing a problem, another will fail later, then another still
later. It is much easier to do them all at once than to have to repair
the same unit over and over as they fail one after another. Been there,
done that.
 
--
Jim Mueller wrongname@nospam.com
 
To get my real email address, replace wrongname with dadoheadman.
Then replace nospam with fastmail. Lastly, replace com with us.
"Benderthe.evilrobot" <Benderthe.evilrobot@virginmedia.com>: Feb 03 09:05PM

<oldschool@tubes.com> wrote in message
news:32779ctsu0qa604ak706qamu4fft571fj8@4ax.com...
> paper caps coated with wax? All they are, is metal foil and paper rolled
> up, and as long as the wax is sealing them to keep out moisture, why
> should they become defective?
 
Waxed paper capacitors are notorious for moisture absorbtion and becoming
leaky.
 
There are plenty of other types of dry capacitors that don't last forever in
the high temperature around tubes.
"Benderthe.evilrobot" <Benderthe.evilrobot@virginmedia.com>: Feb 03 09:12PM

<oldschool@tubes.com> wrote in message
news:nua79chv7ato1hdgir79d0ku56j3s3upnt@4ax.com...
> (meaning the replacements for the wax coated paper caps. ???)
 
> And what are these newer ones made from?
 
> I know the mica and ceramic caps are reliable and last almost forever.
 
I've seen loads of ceramic caps fail - but mostly in TV horizontal scan
sections where the frequency is over 15kHz and high voltage pulse
conditions.
 
This got worse with ever increasing PC monitor resolutions.
 
AFAICR; mica caps were pretty reliable - in most of the places I found them,
they were used for precision and a specific tempco.
Tom Biasi <tombiasi@optonline.net>: Feb 03 04:18PM -0500

On 2/3/2017 2:08 PM, Nick Danger wrote:
 
> Seeing as you brought up WW3, for those of you that may not know it, a
> new president singlehandedly advanced the Doomsday Clock by 30 seconds
> just last week. Heck of a job!
 
Get off of it. You lost.
Ralph Mowery <rmowery28146@earthlink.net>: Feb 03 04:36PM -0500

In article <5894f007$0$55577$b1db1813$7968482@news.astraweb.com>,
wrongname@nospam.com says...
> later. It is much easier to do them all at once than to have to repair
> the same unit over and over as they fail one after another. Been there,
> done that.
 
I believe in replacing most all the components that are similar when one
fails in older equipment. I worked at a large plant and when a 200 HP
motor speed control went bad a factory man was called in. He found two
power diodes bad. As this was a 3 phase motor and had one more, I asked
him to replace it. He told me they were about $ 100 each. I said go
ahead. The down time was costing us much more than that an hour,and to
get him back in would cost a lot more if the 3 rd one failed, it would
be just good insurance. The diode may or may not have been weakened in
some way. $ 100 is a small part of over $ 50,000 or more.
Michael Black <et472@ncf.ca>: Feb 03 05:07PM -0500

"Benderthe.evilrobot" <Benderthe.evilrobot@virginmedia.com>: Feb 03 10:05PM

"Jim Mueller" <wrongname@nospam.com> wrote in message
news:5894f007$0$55577$b1db1813$7968482@news.astraweb.com...
> later. It is much easier to do them all at once than to have to repair
> the same unit over and over as they fail one after another. Been there,
> done that.
 
So have I.
oldschool@tubes.com: Feb 03 04:16PM -0600

On Fri, 3 Feb 2017 14:08:37 -0500, Nick Danger <nick@third.eye.net>
wrote:
 
 
>Seeing as you brought up WW3, for those of you that may not know it, a
>new president singlehandedly advanced the Doomsday Clock by 30 seconds
>just last week. Heck of a job!
 
Yes, precisely why I feel WW3 is a lot closer and more likely than
before. This has nothing to do with my own political party preferences,
or anything else, just the "person" himself (president). However, lets
NOT get into a political discussion on here. Seems like everywhere on
the internet has turned to politics lately. But I still do not feel
safe, with the current state of the world and the current US president.
It seemed a lot safer before, even though the world in general seems a
lot worse than it was in the last few decades.
boomer#6877250@none.com: Feb 03 02:26PM -0600

On Fri, 3 Feb 2017 09:01:08 +0100, Look165 <look165@numericable.fr>
wrote:
 
>It would be OK but you'd better put the 2 240 lugs in parallel on each side.
 
>This is needed for having the maximum available power.
 
Huh? You lost me.
Yes, I know what the word parallel means, but what do mean?
 
On the primary side, I use the 240 lugs, and connect them to a power
cord.
 
On the secondary side I connect the 240 lugs to an outlet.
 
That's really all there is to it, (not including any fuses or switches I
might include).
 
--
 
As far as this project, I have abandoned it, due to learning from the
replies, that the output current would be halved, from 750va to 375va.
I need a supply which outputs at least 500va.
 
I have an isolation transformer with a 100va output. It works ok for the
"American Five" (five tube) hot chassis radios, but I want something
with more current for larger amperage needs.
 
I saw this transformer on ebay and thought it would work. I did not know
that the current would be halved, which is why I asked abotu this,
before buying it. I'll have to just keep watching ebay for something
more suitable that is affordable. My other thought is to wire a 240v
outlet to my bench and use some of the 240 to 120 v transformers on ebay
that sell for small dollars compared to the 120 to 120 transformers. But
the problem with that, is that I often work on stuff away from my bench,
and then I would not be able to use it.
 
I dont need it tomorrow, so I'll just keep watching for something more
affordable that will give me the power I need. Either way, I'm sure I'll
end up buying a transformer and making my own isolation device. The
commercial ones are very costly, especially the ones that output above
250va. I already have plenty of power cords, outlets and enclosures to
make one. And wiring it up is about as simple as any project can be.
 
Thanks to all who helped!
etpm@whidbey.com: Feb 03 10:01AM -0800

Hey All,
I have an old Baldor bench grinder. Probably 70 years old or older.
The motor is the type that uses a capacitor for starting and running.
There is no centrifugal starting switch. I know this type of phase
making scheme provides lower torque for starting so that the motor
takes longer to come up to speed. But this grinder takes 5 seconds to
reach operating speed, 3400 rpm. I replaced the bearings in the motor
and it now spins very easily. There is a 3/4 wide 6 inch grinding
wheel on one side and a light weight 6 inch diamond wheel on the other
side. The cap in the thing might be the original cap. It is a large
round tinned metal can with solder lugs. 330 volts and 400mfd. Could
it be that it needs a new cap? I don't know what kind of cap it is.
Oil filled I imagine but from the high mfd campared to all my other
run caps could it be an electrolytic cap? There is no sign of leaking
and there are two places on the top of the cap where it looks like
holes were sealed with solder.
Thanks,
Eric
"pfjw@aol.com" <pfjw@aol.com>: Feb 03 10:17AM -0800

On Friday, February 3, 2017 at 1:00:51 PM UTC-5, et...@whidbey.com wrote:
 
http://store.eurtonelectric.com/capacitorcd60-850uf300vac-1-1-1-1-1-1-1-1.aspx
 
 
You will need an AC-rated motor-start capacitor. But, typically, such a capacitor provides the initial *OOMPH* to get the initial turn on the motor, after which it more-or-less goes away. If the motor starts without difficultly, even if it takes a while to spool up, the cap's work is done in the first few second or so.
 
If you do replace it, DO NOT use a conventional DC cap, even two caps back-to-back. Non-Polarized does not equal AC rated.
 
This may also be a Motor-Run capacitor, but in that case, there should be two, a START and a RUN. Runs are almost never electrolytic types. Again, it must be AC rated.
 
Note: If a start cap, the motor will not start without it. If a run cap, as it weakens, the motor will run improperly or not make speed at all. And if not there, the motor will not start at all as the cap is required to "rotate the field".
 
Peter Wieck
Melrose Park, PA
etpm@whidbey.com: Feb 03 11:14AM -0800

On Fri, 3 Feb 2017 10:17:20 -0800 (PST), "pfjw@aol.com" <pfjw@aol.com>
wrote:
 
 
>Note: If a start cap, the motor will not start without it. If a run cap, as it weakens, the motor will run improperly or not make speed at all. And if not there, the motor will not start at all as the cap is required to "rotate the field".
 
>Peter Wieck
>Melrose Park, PA
The cap is a start AND run cap. It always stays in circuit and is a
compromise between the proper phase shift for starting and for
running. If it gets replaced it will be with an AC rated cap. I'll
make sure to get a motor run cap too.
Thanks,
Eric
Massoud <mass110@yahoo.com>: Feb 03 07:34PM

> holes were sealed with solder.
> Thanks,
> Eric
 
You have a good start up, so no need to replace the cap.
etpm@whidbey.com: Feb 03 12:24PM -0800

On Fri, 3 Feb 2017 19:34:45 +0000 (UTC), Massoud <mass110@yahoo.com>
wrote:
 
>> Thanks,
>> Eric
 
>You have a good start up, so no need to replace the cap.
 
5 seconds seems like too long. My other two Baldor grinders spin up to
full speed in 2 seconds. These grinders don't have a centrifugal
starting switch either so I assume they are wired just like my older
grinder. I'm concerned the long starting time might lead to
overheating the windings after many starts.
Eric
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