Digest for sci.electronics.repair@googlegroups.com - 24 updates in 4 topics

Jeff Layman <jmlayman@invalid.invalid>: Mar 06 03:44PM

Anyone know how to get the metal chassis out of its plastic case (maybe
other similar Panasonic PVRs are fixed the same way)? I've removed all 6
screws on the back, although I think only 3 look like they fix it in
place, with the rest holding various sockets. I've lifted up a couple
of plastic catches underneath at the front, but it still won't budge -
not even a fraction. I checked under the rubber feet pads in case there
were hidden screws, but there weren't any.
 
It has been working perfectly for nearly 4 years, but in the last couple
of weeks has occasionally failed to record, or will not even turn on
with the remote. I wondered if it has a fan inside which was maybe not
working consistently, although I can't hear one, or perhaps some fluff
or other airborne stuff had got on a heatsink*. It smells of "hot
circuit board" through the vents. I've blown pretty hard into it and
will see if that helps. I just want to get it apart to see if there is
anything obviously faulty.
 
*Many years ago I had to replace a SMPS chip on a Panasonic DVD recorder
(DMR-E55) because they'd skimped on a heatsink. A new chip and a decent
piece of aluminium solved the problem.
 
--
 
Jeff
Chuck <ch@dejanews.net>: Mar 04 12:39PM -0600

>*******
 
>We still wave Old Glory down at the courthouse,
>In Muskogee, Oklahoma, USA.
 
It is interesting that you mentioned "Okie From Muskogee".
I have been stuck in this backward state for 29 years because my
former wife took a job here. Now I'm divorced and moving back north
in 3 weeks. The state should have a new motto such as " land of" 4
day school weeks or pederast bible thumper politicians or deep well
injection induced earthquakes. It will be nice living in a state that
has the best health care and is no. 1 in quality of life. By the
way, Merle was hip and wrote this song as satire. You might want to
check out Merle's favorite singer Iris DeMent if you still don't get
it.
 
---
This email has been checked for viruses by Avast antivirus software.
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Ralph Phillips <ralphp@philent.biz>: Mar 04 09:40PM -0600


> We still wave Old Glory down at the courthouse,
> In Muskogee, Oklahoma, USA.
 
I spend a month there one afternoon back in the 70's.
 
RwP
oldschool@tubes.com: Mar 05 01:39PM -0600


>way, Merle was hip and wrote this song as satire. You might want to
>check out Merle's favorite singer Iris DeMent if you still don't get
>it.
 
Obviously it was a satire. Merle is cool. I like his music.
Some people are just too goddamn serious.... and take everything
literally. Bible thumpers are wayyyyy too serious.....
The south seems like it's full of them types of people.
oldschool@tubes.com: Mar 05 01:43PM -0600

On Mon, 5 Mar 2018 01:06:24 -0000, "Gareth Magennis"
 
>I'm not interested.
 
>Bye.
 
You stand no place of winning with the asshole you were replying to. I
killfiled that Fox Killer long ago. People as hateful as him should not
be allowed online, or in public. But some people were just born to be
assholes I guess.
Fox's Mercantile <jdangus@att.net>: Mar 05 02:06PM -0600

> killfiled that Fox Killer long ago. People as hateful as him should not
> be allowed online, or in public. But some people were just born to be
> assholes I guess.
 
And some people are just too stupid to walk and breath at the same time.
 
To have someone like you call me an asshole is a badge of honor I wear
with pride.
 
--
"I am a river to my people."
Jeff-1.0
WA6FWi
http:foxsmercantile.com
Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net>: Mar 05 05:14PM -0500

>> to be 4 inches.
 
> If I want to measure walkable distances without tools, which occasionally happens, I use yards or metres. Human feet are seldom a foot long.
 
> Don't think I ever met a grown person with 4" hands.
 
The 'hand' is the width of the palm, not the finger span.
 
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
"Gareth Magennis" <soundserviceleeds@outlook.com>: Mar 06 12:20AM

"Jeff Liebermann" wrote in message
news:rd4p9dhp8enn48njcteh8i0o2049nq7ep1@4ax.com...
 
On Sun, 4 Mar 2018 22:16:04 -0000, "Gareth Magennis"
 
>OK, I'm no Physisyst, though I quite liked Physics at school and was
>reasonably good at it.
 
Methinks you mean Fizix.
 
>i.e. Atomic clocks base a second around the determinable decay of some kind
>of (cesium) radioactive particle?
>This is not a variable under normal earth conditions.
 
Nope. Those are "natural units" or units based on the properties of
things found in nature and are therefore not arbitrary. They are used
mostly in Fizix and by quantum mechanics:
<https://en.wikipedia.org/wiki/Natural_units>
 
The remaining units are arbitrary and based on some base unit that is
usually measurable, until the search for finer resolution brings the
standard bearers into the quagmire of quantum fizix, where their
standards run into problems with Heisenberg's uncertainty principle:
<https://en.wikipedia.org/wiki/Heisenberg%27s_uncertainty_principle>
where one can only measure what one cannot find, and the observer
effect:
<https://en.wikipedia.org/wiki/Observer_effect_(physics)>
where things move away if you try to measure them. As you might
suspect, measurement standards based on sub-atomic particles, is a
really bad idea.
 
Such difficulties have not stopped people from inventing their own
units of measures, usually for some devious purpose:
<https://en.wikipedia.org/wiki/List_of_unusual_units_of_measurement>
Unfortunately, it doesn't list the unit of measure that I invented and
probably should copyright. Helen of Troy allegedly launched 1000
ships and was known to be the ultimate feminine beauty of her day.
Therefore, I defined the measure of contemporary feminine beauty as
the milliHelen, which would launch one ship. Of course, negative
milliHelens are the measure of feminine ugliness capable of sinking
one ship. So far, the beauty, fashion and entertainment industries
have not expressed any interest in adopting my measurement system.
 
Another useful unit of measure that I invented is the Subaru Day(tm).
The digital clock in my 2001 Subaru Forester runs about 10 seconds
slow every day, making the length of the average day equal to 24 hrs,
0 mins, and 10 seconds. Rather than repair and calibrate my clock, I
have invented a new unit of measure, which defines the length of my
day to be 10 seconds longer than the traditional 24 hr day. In
keeping with astronomical traditions, the Subaru Day will be
synchronized with the solar day several times per year, usually on the
day I do an oil and filter change.
 
I hope this helps...
 
 
 
 
*******************************************
 
 
Oh dear, hope this helps.
 
 
 
 
"Jeff Liebermann" wrote in message
news:54lttb1qr9hovpe6iucnc0gpkeu1sfl4k5@4ax.com...
 
On Sun, 18 Sep 2016 03:28:27 -0700 (PDT), jurb6006@gmail.com wrote:
 
>>"How am I doing? Your turn. "
 
>I know you are a Jew, but you are a USian Jew.
 
I was born in Germany. Parents are Polish. Ancestors are mostly
Russian. I came to the USA when I was about 5 years old.
 
>That means that you got all the arrogance we got plus about 14 % more.
 
Just because we run everything, manage everything, own everything, and
control everything, doesn't mean we have to arrogant about it. Being
arrogant in public is a quick ticket to an immediate downfall,
something Jews are well aware of. We may be the smartest, best, most
powerful, and most knowledgeable, but it would stupid to mention it in
public. It tends to attract attention, something we really don't need
or want.
"Ron D." <ron.dozier@gmail.com>: Mar 05 09:42PM -0800

This degenerated, but I do like the ability to estimate with body parts. 300 mm does nothing for me mentally. 30.0 cm does a better job.
 
The TS/OP can 3D print a part. Also look for ones that have already been done.
 
...
Good thing there was no problem with changing from " cps, kcps & Mcps "
to " Hz, kHz and MHz ".
 
Or was there .....
 
There was, sort of, I had a valve car Blaupunkt radio whose dial was graduated in increasing wavelength (Not frequency). That's the a RPN (reverse Polish Notation) radio vs an Algebraic radio that everyone uses.
oldschool@tubes.com: Mar 06 12:08AM -0600

On Mon, 5 Mar 2018 17:14:28 -0500, Phil Hobbs
 
>> If I want to measure walkable distances without tools, which occasionally happens,
>> I use yards or metres. Human feet are seldom a foot long.
 
I always wondered who's feet they used to develop the original foot (as
in 12"). Human feet vary greatly in size. Of course children have
shorter feet and women usually do also. Adult males usually
have feet as close to 12" as possible.
In my case, I wear a size 11 shoe. My feet measure 10 5/8" from heel to
tip of longest toe. To measure something with my feet, I'm best off
doing it with my shoes on. They are very close to 12" on the outside. Of
course that too depends on the type of shoe or boot. My big old heavy
winter boots are over 13", but well insulated.
 
I met a guy once who needs size 15 shoes. Them are some big honking
feet!!! :) He had to go to a special store to buy shoes.
 
 
>> Don't think I ever met a grown person with 4" hands.
 
>The 'hand' is the width of the palm, not the finger span.
 
That's Correct.
 
>Cheers
 
>Phil Hobbs
 
 
BTW
In metric, my size 11 shoes would be 27.94cm (28cm). That seems totally
awkward.....
 
But then there are men who prefer to measure their male organ in metric,
because the number is larger, they seem to think it makes them sound
more masculine. So the average 6" penis is now a 15.24cm penis...
I'm sorry to say, but it's the same damn size, and it wont impress the
women any more !!!
Fox's Mercantile <jdangus@att.net>: Mar 06 12:26AM -0600

On 3/5/18 11:42 PM, Ron D. wrote:
> whose dial was graduated in increasing wavelength (Not
> frequency). That's the a RPN (reverse Polish Notation)
> radio vs an Algebraic radio that everyone uses.
 
I have an American made AA5 in the shop that is also
graduated in wavelength rather than frequency.
 
But my personal favorite is one with 1500 on the left and
550 on the right.
 
 
 
--
"I am a river to my people."
Jeff-1.0
WA6FWi
http:foxsmercantile.com
Mike Coon <gravity@mjcoon.plus.com>: Mar 06 07:56AM

In article <otas9d1pbl3ahijs3b0la9tm0t9tuc9u2i@4ax.com>,
oldschool@tubes.com says...
 
> I always wondered who's feet they used to develop the original foot
(as
> in 12"). Human feet vary greatly in size. Of course children have
> shorter feet and women usually do also.
 
I recommend the love song "...but your feet's too big"! (Fats Waller?)
 
Mike.
tabbypurr@gmail.com: Mar 06 03:55AM -0800

On Tuesday, 6 March 2018 06:27:04 UTC, Fox's Mercantile wrote:
> graduated in wavelength rather than frequency.
 
> But my personal favorite is one with 1500 on the left and
> 550 on the right.
 
I have radios marked 0-10 or 0-100. They're fun to use.
 
 
NT
John-Del <ohger1s@gmail.com>: Mar 06 04:23AM -0800

> > 550 on the right.
 
> I have radios marked 0-10 or 0-100. They're fun to use.
 
> NT
 
Some late 20s superhets used a 0-100 scale, in keeping with the TRF three dial scales.
Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net>: Mar 06 10:38AM -0500

On 03/06/2018 12:42 AM, Ron D. wrote:
 
> ...
> Good thing there was no problem with changing from " cps, kcps & Mcps "
> to " Hz, kHz and MHz ".
 
I still write Mc on whiteboards and paper schematics, because it's
faster. The official switch to hertz predates me, but I always did like
old radio books--I'm just re-reading "Superregenerative Receivers" by
Whitehead. Magic.
 
Cheers
 
Phil Hobbs
 
--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510
 
http://electrooptical.net
https://hobbs-eo.com
joseph@cypressfilms.com: Mar 05 09:41AM -0800

> > > great.
 
> > I have had the same problem with my RX-5502. Can you tell me what the $2 Radio Shack part is? I looked at the thread you quoted and did not see a reference to the part name or number. Thanks!
 
> he told you, the 7812.
 
Ah, yes. Sorry, for some reason I got it into my head that he replaced it with something different (and better). And to John-Del's point, I have no intention of getting in over my head with this; I am just mad that a product I paid a fair amount of money for stopped working after 4 hours of use. If I can find someone local to fix it, I will. Otherwise I'll move on with my life.
jurb6006@gmail.com: Mar 05 11:28AM -0800

What is local ? I fix these things.
oldschool@tubes.com: Mar 06 12:16AM -0600


>> > I have had the same problem with my RX-5502. Can you tell me what the $2 Radio
>> > Shack part is? I looked at the thread you quoted and did not see a reference to
>> > the part name or number. Thanks!
 
Back in the 70s, I had to repair a Sherwood solid state receiver for
someone that had the same issues. (I dont remember the model). But that
damn thing really pissed me off for days. I finally fixed it, but it
would have cost the owner more than a new stereo if I charged the going
rate per hour. In the end I was lucky to get about $2 an hour for my
time. I was not impressed by Sherwood gear by the time I finished that
one.
Fox's Mercantile <jdangus@att.net>: Mar 06 12:31AM -0600

> In the end I was lucky to get about $2 an hour for my
> time.
 
Not a very effective use of your time.
 
--
"I am a river to my people."
Jeff-1.0
WA6FWi
http:foxsmercantile.com
tabbypurr@gmail.com: Mar 06 03:51AM -0800

On Tuesday, 6 March 2018 06:32:03 UTC, Fox's Mercantile wrote:
> > In the end I was lucky to get about $2 an hour for my
> > time.
 
> Not a very effective use of your time.
 
No, but we've all had jobs where that became true, more so when young.
 
 
NT
John-Del <ohger1s@gmail.com>: Mar 06 04:26AM -0800


> > Not a very effective use of your time.
 
> No, but we've all had jobs where that became true, more so when young.
 
> NT
 
Even today I will tackle a job that I know is a loss going in, but with a reason. When I see a circuit board for a problem more than once, I know it's a pattern. Running down a problem on a board with no service data is a nightmare, but once that problem is identified, the next one takes 15 minutes. Much better than paying for a replacement board. The more I see after that the bigger the payoff.
Ralph Mowery <rmowery28146@earthlink.net>: Mar 06 10:07AM -0500

In article <33d908d0-0bca-4cb6-9130-1748f821052d@googlegroups.com>,
ohger1s@gmail.com says...
 
> Even today I will tackle a job that I know is a loss going in, but with a reason. When I see a circuit board for a problem more than once, I know it's a pattern. Running down a problem on a board with no service data is a nightmare, but once that problem is identified, the next one takes 15 minutes. Much better than paying for
a replacement board. The more I see after that the bigger the payoff.
 
Someties it works that way. In the 70's I repaired some CB radios for
the locals. Did not charge much as I was partly doing it as a hobby and
building my skills as I had a regular job. I remember one that a dealer
brought to me that I had not worked on before. Took several hours to
repair the problem There was a verticl circuit board that was hard to
run checks on. I finally saw where one of the leads was not soldered.
The dealer brought me 5 or 6 more later, and it only took a short time
to find some leads within an inch of the same place that was not
soldered.
 
Many items will have one or two problems that if you check those first
it will repair 99% of the problems.
N_Cook <diverse@tcp.co.uk>: Mar 05 07:51AM

Still doing proper radio-controlled timing, without any intrusion from
me, despite some of the coldest days for some years.
N_Cook <diverse@tcp.co.uk>: Mar 05 08:35AM

On 05/03/2018 07:51, N_Cook wrote:
> Still doing proper radio-controlled timing, without any intrusion from
> me, despite some of the coldest days for some years.
 
Change of title, just noticed its Wave Ceptor
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