Mopar model 812 car radio, (early 1950's Chrysler product)

[Michael A. Terrell]

Meat Plow wrote:

On Sun, 24 Apr 2011 15:23:00 -0400, Michael A. Terrell wrote:

A lot of old car radios used a 262.5 KHz IF to prevent image problems
at 910 KHz. 262.5 KHz puts them all out of band.

Old being before what year? I was just a young pup learning back in the
70's so I don't recall a 262 IF. Probably too much LSD later on.

Delco was still using 262.5 in the early '70s. I could repair most
of their mid '60s to mid '70s AM radios in less than 15 minutes. Some
took less than 5 minutes. I still hve most of the H.W. Sams AR series
manuals. The cheap Japanese radios used either 450 or 455 KHz IFs,
which caused problems on 900 or 910 KHz.


--
You can't fix stupid. You can't even put a Band-Aid™ on it, because it's
Teflon coated.

 

[Meat Plow]

On Sun, 24 Apr 2011 23:44:39 -0400, Michael A. Terrell wrote:

Meat Plow wrote:

On Sun, 24 Apr 2011 15:23:00 -0400, Michael A. Terrell wrote:

A lot of old car radios used a 262.5 KHz IF to prevent image
problems
at 910 KHz. 262.5 KHz puts them all out of band.

Old being before what year? I was just a young pup learning back in the
70's so I don't recall a 262 IF. Probably too much LSD later on.


Delco was still using 262.5 in the early '70s. I could repair most
of their mid '60s to mid '70s AM radios in less than 15 minutes. Some
took less than 5 minutes. I still hve most of the H.W. Sams AR series
manuals. The cheap Japanese radios used either 450 or 455 KHz IFs,
which caused problems on 900 or 910 KHz.

Well that makes sense. I got pretty good on the Delco stuff. Mostly bad
tubes, suppressor caps, stuck vibrators, things of that nature. Tweaking
the receiver I usually did by ear going through each stage from start to
finish. Then the antenna trimmer once it was back in the vehicle. I'm
sure I have an old tube radio and a few parts up in the attic. Used to
have one on my bench for music.



--
Live Fast Die Young, Leave A Pretty Corpse

 

[Michael A. Terrell]

Meat Plow wrote:

On Sun, 24 Apr 2011 23:44:39 -0400, Michael A. Terrell wrote:

Meat Plow wrote:

On Sun, 24 Apr 2011 15:23:00 -0400, Michael A. Terrell wrote:

A lot of old car radios used a 262.5 KHz IF to prevent image
problems
at 910 KHz. 262.5 KHz puts them all out of band.

Old being before what year? I was just a young pup learning back in the
70's so I don't recall a 262 IF. Probably too much LSD later on.


Delco was still using 262.5 in the early '70s. I could repair most
of their mid '60s to mid '70s AM radios in less than 15 minutes. Some
took less than 5 minutes. I still hve most of the H.W. Sams AR series
manuals. The cheap Japanese radios used either 450 or 455 KHz IFs,
which caused problems on 900 or 910 KHz.

Well that makes sense. I got pretty good on the Delco stuff. Mostly bad
tubes, suppressor caps, stuck vibrators, things of that nature. Tweaking
the receiver I usually did by ear going through each stage from start to
finish. Then the antenna trimmer once it was back in the vehicle. I'm
sure I have an old tube radio and a few parts up in the attic. Used to
have one on my bench for music.

I gave away about 200 '50s through '70s car radios when I moved
south, 25 years ago. Now, most are worth $100 to $1000.

--
You can't fix stupid. You can't even put a Band-Aid™ on it, because it's
Teflon coated.

 

[klem kedidelhopper]

On Apr 25, 9:12 pm, "Michael A. Terrell" <mike.terr...@earthlink.net>
wrote:

Meat Plow wrote:

On Sun, 24 Apr 2011 23:44:39 -0400, Michael A. Terrell wrote:

Meat Plow wrote:

On Sun, 24 Apr 2011 15:23:00 -0400, Michael A. Terrell wrote:

   A lot of old car radios used a 262.5 KHz IF to prevent image
   problems
at 910 KHz.  262.5 KHz puts them all out of band.

Old being before what year? I was just a young pup learning back in the
70's so I don't recall a 262 IF. Probably too much LSD later on.

   Delco was still using 262.5 in the early '70s.  I could repair most
of their mid '60s to mid '70s AM radios in less than 15 minutes.  Some
took less than 5 minutes.  I still hve most of the H.W. Sams AR series
manuals.  The cheap Japanese radios used either 450 or 455 KHz IFs,
which caused problems on 900 or 910 KHz.

Well that makes sense. I got pretty good on the Delco stuff. Mostly bad
tubes, suppressor caps, stuck vibrators, things of that nature. Tweaking
the receiver I usually did by ear going through each stage from start to
finish. Then the antenna trimmer once it was back in the vehicle. I'm
sure I have an old tube radio and a few parts up in the attic. Used to
have one on my bench for music.

   I gave away about 200 '50s through '70s car radios when I moved
south, 25 years ago. Now, most are worth $100 to $1000.

--
You can't fix stupid. You can't even put a Band-Aid™ on it, because it's
Teflon coated.

I think I've run into "flaming" stupid before. That would melt teflon.
Many years ago a guy handed me a short wave radio to repair adding, "I
noticed that all the screws in those "can things" and holes were loose
so I tightened them all for you". After we discussed what a full
alignment, in addition to whatever repair he was bringing it in for in
the first place would cost, he left with his radio and his tail
between his legs.....Lenny

 

[Meat Plow]

On Mon, 25 Apr 2011 21:12:48 -0400, Michael A. Terrell wrote:

Meat Plow wrote:

On Sun, 24 Apr 2011 23:44:39 -0400, Michael A. Terrell wrote:

Meat Plow wrote:

On Sun, 24 Apr 2011 15:23:00 -0400, Michael A. Terrell wrote:

A lot of old car radios used a 262.5 KHz IF to prevent image
problems
at 910 KHz. 262.5 KHz puts them all out of band.

Old being before what year? I was just a young pup learning back in
the 70's so I don't recall a 262 IF. Probably too much LSD later on.


Delco was still using 262.5 in the early '70s. I could repair
most
of their mid '60s to mid '70s AM radios in less than 15 minutes.
Some took less than 5 minutes. I still hve most of the H.W. Sams AR
series manuals. The cheap Japanese radios used either 450 or 455 KHz
IFs, which caused problems on 900 or 910 KHz.

Well that makes sense. I got pretty good on the Delco stuff. Mostly bad
tubes, suppressor caps, stuck vibrators, things of that nature.
Tweaking the receiver I usually did by ear going through each stage
from start to finish. Then the antenna trimmer once it was back in the
vehicle. I'm sure I have an old tube radio and a few parts up in the
attic. Used to have one on my bench for music.


I gave away about 200 '50s through '70s car radios when I moved
south, 25 years ago. Now, most are worth $100 to $1000.

Doesn't that piss you off.



--
Live Fast Die Young, Leave A Pretty Corpse

 

[Meat Plow]

On Tue, 26 Apr 2011 12:13:25 -0700, klem kedidelhopper wrote:

On Apr 25, 9:12 pm, "Michael A. Terrell" <mike.terr...@earthlink.net
wrote:
Meat Plow wrote:

On Sun, 24 Apr 2011 23:44:39 -0400, Michael A. Terrell wrote:

Meat Plow wrote:

On Sun, 24 Apr 2011 15:23:00 -0400, Michael A. Terrell wrote:

   A lot of old car radios used a 262.5 KHz IF to prevent
   image problems
at 910 KHz.  262.5 KHz puts them all out of band.

Old being before what year? I was just a young pup learning back
in the 70's so I don't recall a 262 IF. Probably too much LSD
later on.

   Delco was still using 262.5 in the early '70s.  I could repair
   most
of their mid '60s to mid '70s AM radios in less than 15 minutes.
 Some took less than 5 minutes.  I still hve most of the H.W. Sams
AR series manuals.  The cheap Japanese radios used either 450 or
455 KHz IFs, which caused problems on 900 or 910 KHz.

Well that makes sense. I got pretty good on the Delco stuff. Mostly
bad tubes, suppressor caps, stuck vibrators, things of that nature.
Tweaking the receiver I usually did by ear going through each stage
from start to finish. Then the antenna trimmer once it was back in
the vehicle. I'm sure I have an old tube radio and a few parts up in
the attic. Used to have one on my bench for music.

   I gave away about 200 '50s through '70s car radios when I moved
south, 25 years ago. Now, most are worth $100 to $1000.

--
You can't fix stupid. You can't even put a Band-Aid™ on it, because
it's Teflon coated.

I think I've run into "flaming" stupid before. That would melt teflon.
Many years ago a guy handed me a short wave radio to repair adding, "I
noticed that all the screws in those "can things" and holes were loose
so I tightened them all for you". After we discussed what a full
alignment, in addition to whatever repair he was bringing it in for in
the first place would cost, he left with his radio and his tail between
his legs.....Lenny

I've run into 'tweakers' before busting the slugs in the cans not knowing
their ass from a hole in the ground about what they were doing. I fixed
up a couple, removing the busted slugs, chipping them out in pieces that
took hours. And cost them dearly. Those were for classic autos that the
owner wanted to keep original, and where the cost of replacing busted
slugs and alignment was cheaper than finding a replacement.




--
Live Fast Die Young, Leave A Pretty Corpse

 

[Michael A. Terrell]

klem kedidelhopper wrote:

On Apr 25, 9:12 pm, "Michael A. Terrell" <mike.terr...@earthlink.net
wrote:
Meat Plow wrote:

On Sun, 24 Apr 2011 23:44:39 -0400, Michael A. Terrell wrote:

Meat Plow wrote:

On Sun, 24 Apr 2011 15:23:00 -0400, Michael A. Terrell wrote:

A lot of old car radios used a 262.5 KHz IF to prevent image
problems
at 910 KHz. 262.5 KHz puts them all out of band.

Old being before what year? I was just a young pup learning back in the
70's so I don't recall a 262 IF. Probably too much LSD later on.

Delco was still using 262.5 in the early '70s. I could repair most
of their mid '60s to mid '70s AM radios in less than 15 minutes. Some
took less than 5 minutes. I still hve most of the H.W. Sams AR series
manuals. The cheap Japanese radios used either 450 or 455 KHz IFs,
which caused problems on 900 or 910 KHz.

Well that makes sense. I got pretty good on the Delco stuff. Mostly bad
tubes, suppressor caps, stuck vibrators, things of that nature. Tweaking
the receiver I usually did by ear going through each stage from start to
finish. Then the antenna trimmer once it was back in the vehicle. I'm
sure I have an old tube radio and a few parts up in the attic. Used to
have one on my bench for music.

I gave away about 200 '50s through '70s car radios when I moved
south, 25 years ago. Now, most are worth $100 to $1000.

--
You can't fix stupid. You can't even put a Band-Aid™ on it, because it's
Teflon coated.

I think I've run into "flaming" stupid before. That would melt teflon.
Many years ago a guy handed me a short wave radio to repair adding, "I
noticed that all the screws in those "can things" and holes were loose
so I tightened them all for you". After we discussed what a full
alignment, in addition to whatever repair he was bringing it in for in
the first place would cost, he left with his radio and his tail
between his legs.....Lenny

I've had them walk in the shop with the coil from an IF transformer
where they used an old Allen wrench. It cracked the cores, but they
kept turning till they ripped the leads of the coil form. The funniest
was some idiot who called to see what we charge to fix a car radio, and
told us he wouldn't pay our service rate. The next day he walked into
the shop with the electrolytic from a mid '60s Delco solid state AM
radio that he had literally ripped out of the radio with a pair of
channel lock pliers, with part of the PC board still attached. He told
us that he wanted to buy a 'vibrator'. "My daddy used to fix the radio
in his 55 chevy all the time, and he told me that it's always a bad
vibrator!" He didn't believe that his radio didn't have a vibrator, or
that the radio wasn't worth fixing. He must have taken it to every shop
in town after that, because we got calls from just about every other
shop in the area, telling us about the idiot with the damaged
electrolytic.


--
You can't fix stupid. You can't even put a Band-Aid™ on it, because it's
Teflon coated.

 

[Michael A. Terrell]

Meat Plow wrote:

On Mon, 25 Apr 2011 21:12:48 -0400, Michael A. Terrell wrote:

Meat Plow wrote:

On Sun, 24 Apr 2011 23:44:39 -0400, Michael A. Terrell wrote:

Meat Plow wrote:

On Sun, 24 Apr 2011 15:23:00 -0400, Michael A. Terrell wrote:

A lot of old car radios used a 262.5 KHz IF to prevent image
problems
at 910 KHz. 262.5 KHz puts them all out of band.

Old being before what year? I was just a young pup learning back in
the 70's so I don't recall a 262 IF. Probably too much LSD later on.


Delco was still using 262.5 in the early '70s. I could repair
most
of their mid '60s to mid '70s AM radios in less than 15 minutes.
Some took less than 5 minutes. I still hve most of the H.W. Sams AR
series manuals. The cheap Japanese radios used either 450 or 455 KHz
IFs, which caused problems on 900 or 910 KHz.

Well that makes sense. I got pretty good on the Delco stuff. Mostly bad
tubes, suppressor caps, stuck vibrators, things of that nature.
Tweaking the receiver I usually did by ear going through each stage
from start to finish. Then the antenna trimmer once it was back in the
vehicle. I'm sure I have an old tube radio and a few parts up in the
attic. Used to have one on my bench for music.


I gave away about 200 '50s through '70s car radios when I moved
south, 25 years ago. Now, most are worth $100 to $1000.

Doesn't that piss you off.

I had a choice of bringing my tools, parts and manuals, or the
radios. I made a lot more money from using the tools. I hauled a little
over 17,000 pounds of tools, parts and manuals 1,000 miles, in two
trips.


--
You can't fix stupid. You can't even put a Band-Aid™ on it, because it's
Teflon coated.

 

[Meat Plow]

On Tue, 26 Apr 2011 22:36:18 -0400, Michael A. Terrell wrote:

Meat Plow wrote:

On Mon, 25 Apr 2011 21:12:48 -0400, Michael A. Terrell wrote:

Meat Plow wrote:

On Sun, 24 Apr 2011 23:44:39 -0400, Michael A. Terrell wrote:

Meat Plow wrote:

On Sun, 24 Apr 2011 15:23:00 -0400, Michael A. Terrell wrote:

A lot of old car radios used a 262.5 KHz IF to prevent image
problems
at 910 KHz. 262.5 KHz puts them all out of band.

Old being before what year? I was just a young pup learning back
in the 70's so I don't recall a 262 IF. Probably too much LSD
later on.


Delco was still using 262.5 in the early '70s. I could repair
most
of their mid '60s to mid '70s AM radios in less than 15 minutes.
Some took less than 5 minutes. I still hve most of the H.W. Sams
AR series manuals. The cheap Japanese radios used either 450 or
455 KHz IFs, which caused problems on 900 or 910 KHz.

Well that makes sense. I got pretty good on the Delco stuff. Mostly
bad tubes, suppressor caps, stuck vibrators, things of that nature.
Tweaking the receiver I usually did by ear going through each stage
from start to finish. Then the antenna trimmer once it was back in
the vehicle. I'm sure I have an old tube radio and a few parts up in
the attic. Used to have one on my bench for music.


I gave away about 200 '50s through '70s car radios when I moved
south, 25 years ago. Now, most are worth $100 to $1000.

Doesn't that piss you off.


I had a choice of bringing my tools, parts and manuals, or the
radios. I made a lot more money from using the tools. I hauled a little
over 17,000 pounds of tools, parts and manuals 1,000 miles, in two
trips.

Was a semi with a 60, lbs load limit too much money one way?



--
Live Fast Die Young, Leave A Pretty Corpse

 

[Ron D.]

I have, i think, an old vibrator tester that plugged into a tube
tester. It had two lamps sticking out of the side. The vibrator was
bad if they glowed equally or didn't glow at all.

 

[Michael A. Terrell]

Meat Plow wrote:

On Tue, 26 Apr 2011 22:36:18 -0400, Michael A. Terrell wrote:

Meat Plow wrote:

On Mon, 25 Apr 2011 21:12:48 -0400, Michael A. Terrell wrote:

Meat Plow wrote:

On Sun, 24 Apr 2011 23:44:39 -0400, Michael A. Terrell wrote:

Meat Plow wrote:

On Sun, 24 Apr 2011 15:23:00 -0400, Michael A. Terrell wrote:

A lot of old car radios used a 262.5 KHz IF to prevent image
problems
at 910 KHz. 262.5 KHz puts them all out of band.

Old being before what year? I was just a young pup learning back
in the 70's so I don't recall a 262 IF. Probably too much LSD
later on.


Delco was still using 262.5 in the early '70s. I could repair
most
of their mid '60s to mid '70s AM radios in less than 15 minutes.
Some took less than 5 minutes. I still hve most of the H.W. Sams
AR series manuals. The cheap Japanese radios used either 450 or
455 KHz IFs, which caused problems on 900 or 910 KHz.

Well that makes sense. I got pretty good on the Delco stuff. Mostly
bad tubes, suppressor caps, stuck vibrators, things of that nature.
Tweaking the receiver I usually did by ear going through each stage
from start to finish. Then the antenna trimmer once it was back in
the vehicle. I'm sure I have an old tube radio and a few parts up in
the attic. Used to have one on my bench for music.


I gave away about 200 '50s through '70s car radios when I moved
south, 25 years ago. Now, most are worth $100 to $1000.

Doesn't that piss you off.


I had a choice of bringing my tools, parts and manuals, or the
radios. I made a lot more money from using the tools. I hauled a little
over 17,000 pounds of tools, parts and manuals 1,000 miles, in two
trips.

Was a semi with a 60, lbs load limit too much money one way?

I made two trips in a stepvan, for under $150. It took several weeks
on each end to load and unload the truck, so a semi would have been out
of the question.


--
You can't fix stupid. You can't even put a Band-Aid™ on it, because it's
Teflon coated.

 

[klem kedidelhopper]

On Apr 26, 3:55 pm, Meat Plow <mhywa...@yahoo.com> wrote:

On Mon, 25 Apr 2011 21:12:48 -0400, Michael A. Terrell wrote:
Meat Plow wrote:

On Sun, 24 Apr 2011 23:44:39 -0400, Michael A. Terrell wrote:

Meat Plow wrote:

On Sun, 24 Apr 2011 15:23:00 -0400, Michael A. Terrell wrote:

   A lot of old car radios used a 262.5 KHz IF to prevent image
   problems
at 910 KHz.  262.5 KHz puts them all out of band.

Old being before what year? I was just a young pup learning back in
the 70's so I don't recall a 262 IF. Probably too much LSD later on..

   Delco was still using 262.5 in the early '70s.  I could repair
   most
of their mid '60s to mid '70s AM radios in less than 15 minutes.
Some took less than 5 minutes.  I still hve most of the H.W. Sams AR
series manuals.  The cheap Japanese radios used either 450 or 455 KHz
IFs, which caused problems on 900 or 910 KHz.

Well that makes sense. I got pretty good on the Delco stuff. Mostly bad
tubes, suppressor caps, stuck vibrators, things of that nature.
Tweaking the receiver I usually did by ear going through each stage
from start to finish. Then the antenna trimmer once it was back in the
vehicle. I'm sure I have an old tube radio and a few parts up in the
attic. Used to have one on my bench for music.

   I gave away about 200 '50s through '70s car radios when I moved
south, 25 years ago. Now, most are worth $100 to $1000.

Doesn't that piss you off.

--
Live Fast Die Young, Leave A Pretty Corpse

It was a nice Halicrafters too

 

[spamtrap1888]

On May 1, 2:53 pm, klem kedidelhopper <captainvideo462...@gmail.com>
wrote:

It was a nice Halicrafters too

Our TV set was made by Hallicrafters, back when Chicago was the world
hub of the consumer electronics industry. At the same time, we had a
Webcor phonograph and a Zenith radio. My father later bought a Webcor
wire recorder second-hand, followed by a Wollensak tape recorder. The
Jensen Speaker division of the Muter Company was within walking
distance of our house. Then my parents got an Admiral portable TV for
their bedroom. I briefly had a Sherwood stereo receiver, and, at the
height of the CB craze, a Cobra CB transceiver. Only Cobra survives as
a Chicago-based company today, although Hallicrafters continues to
exist as part of the defense contractor Northrop Grumman.

 

[Meat Plow]

On Sun, 01 May 2011 15:14:18 -0700, spamtrap1888 wrote:

On May 1, 2:53 pm, klem kedidelhopper <captainvideo462...@gmail.com
wrote:


It was a nice Halicrafters too

Our TV set was made by Hallicrafters, back when Chicago was the world
hub of the consumer electronics industry. At the same time, we had a
Webcor phonograph and a Zenith radio. My father later bought a Webcor
wire recorder second-hand, followed by a Wollensak tape recorder. The
Jensen Speaker division of the Muter Company was within walking distance
of our house. Then my parents got an Admiral portable TV for their
bedroom. I briefly had a Sherwood stereo receiver, and, at the height of
the CB craze, a Cobra CB transceiver. Only Cobra survives as a
Chicago-based company today, although Hallicrafters continues to exist
as part of the defense contractor Northrop Grumman.

Ahh the good old days. My first SW transceiver was a Heath SB-101
purchased at a hamfest back in 1990 for $80 bucks with PSU. It was in
excellent cosmetic shape but needed a pair of 6146 output tubes and
a couple others. Back then replacements were pretty cheap I think I
ended up with around $40 more in it to get it back to working specs.

I've owned two or three Halicrafters receivers over the past 35 years.
And a couple really decent Radio Shack SW receivers.

Back in the late 50's my dad built a Heathkit CB. If I recall you plugged
the crystals right in the front. Had had someone put up a 40 foot tower
with a 5 element Mosley yagi beam. I guess I can credit that for my
start in electronics, watching dad put that thing together and talking
'skip' on it. There were a few locals that also has Cb radios back then.
I can even remember my dad's call sign.


--
Live Fast Die Young, Leave A Pretty Corpse

 

[klem kedidelhopper]

On Apr 26, 3:55 pm, Meat Plow <mhywa...@yahoo.com> wrote:

On Mon, 25 Apr 2011 21:12:48 -0400, Michael A. Terrell wrote:
Meat Plow wrote:

On Sun, 24 Apr 2011 23:44:39 -0400, Michael A. Terrell wrote:

Meat Plow wrote:

On Sun, 24 Apr 2011 15:23:00 -0400, Michael A. Terrell wrote:

   A lot of old car radios used a 262.5 KHz IF to prevent image
   problems
at 910 KHz.  262.5 KHz puts them all out of band.

Old being before what year? I was just a young pup learning back in
the 70's so I don't recall a 262 IF. Probably too much LSD later on..

   Delco was still using 262.5 in the early '70s.  I could repair
   most
of their mid '60s to mid '70s AM radios in less than 15 minutes.
Some took less than 5 minutes.  I still hve most of the H.W. Sams AR
series manuals.  The cheap Japanese radios used either 450 or 455 KHz
IFs, which caused problems on 900 or 910 KHz.

Well that makes sense. I got pretty good on the Delco stuff. Mostly bad
tubes, suppressor caps, stuck vibrators, things of that nature.
Tweaking the receiver I usually did by ear going through each stage
from start to finish. Then the antenna trimmer once it was back in the
vehicle. I'm sure I have an old tube radio and a few parts up in the
attic. Used to have one on my bench for music.

   I gave away about 200 '50s through '70s car radios when I moved
south, 25 years ago. Now, most are worth $100 to $1000.

Doesn't that piss you off.

--
Live Fast Die Young, Leave A Pretty Corpse

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Mopar model 812 car radio (Early 1950's Chrysler )


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klem kedidelhopper
I know that this is off topic and I hope that its not a problem. It
seems lik...

Apr 19 (13 days ago)
Jerry S
You can try cleaning all the contact points. One set acts as an
interrupter o...

Apr 20 (13 days ago)
Reply
|
klem kedidelhopper to tv-repair

show details Apr 23 (9 days ago)

Thanks everyone for the response and thank you Eric for the Sams. I
just came home from the hospital after having my hip replaced so I've
been away from my repairs and this group for a few days. Lucky my shop
is in my home so when I do feel like it I can try to get back to work.
I did get the vibrator to vibrate and the radio to work somewhat
before I left. Possibly it was the rapping on the can that started it
up. I also had some buzzing in the speaker and bridged an electrolytic
accross one of the terminals of the three section cap in the radio
which improved it. So I'll replace that and possibly cut the vibrator
open when I feel better. I remember doing that MANY years ago. Wow
this thing draws 6.50 amps at 6,0 volts! I guess it HAS been a long
time....Lenny
- Show quoted text -

On Wed, Apr 20, 2011 at 11:29 AM, Jerry S <greentron@att.net> wrote:

You can try cleaning all the contact points. One set acts as an interrupter
or polarity reverser for the coil. Another set acts as switches for the
transformer primary. It might have still another set that acts as a
synchronous rectifier for the transformer output. There may be some small
buffer capacitors across some of the contacts. The rubber can insulation may
need to be replaced if it has collapsed. Some vibrators were very
sophisticated, even using magnetic latching of the armature instead of just
a buzzer operation.
There are solid state replacements for the vibrators, disguised to look like
the original.
Jerry S
greentron@att.net
----- Original Message -----
From: "klem kedidelhopper" <captainvideo462009@gmail.com
To: "tv-repair" <tv-repair@yahoogroups.com
Sent: Tuesday, April 19, 2011 10:12 PM
Subject: [tv-repair] Mopar model 812 car radio (Early 1950's Chrysler )


I know that this is off topic and I hope that its not a problem. It
seems like everything coming in here lately is other than TV repairs.
But TV's are getting so cheap now and as a consequence things are so
slow I hate to turn anything away these days.This is a six volt
positive ground radio out of an early 1950's Chrysler product. Tubes
light up but vibrator will not buzz. I pulled the vibrator and
connected the coil terminals up to six volts and it does buzz. Not
conclusive but at the very least it tells me that six volts is not
reaching the coil. Does anyone have a schematic for this radio, or do
you know where I might find one? The owner just bought the car, is
restoring it and really wants to keep it original, so he'd really like
to have this radio working. Thanks, Lenny

Ps. A lady called me today about a Visio that she moved without
disconnecting the cable first. Naturally she tore the F connector from
the set. I gave her a rough estimate of between 100.00 and 150.00 She
told me she only paid 150.00 for the set and thanked me for my time.
And we're trying to make a living at this?


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klem kedidelhopper to tv-repair

show details 12:07 PM (9 minutes ago)

I got this set working and it actually works pretty well too. The
vibrator buffer cap though shows very slight leakage and I would like
to replace it. The original is a .0047mfd@ 1600V. I know that the cap
and transformer make up a kind of "tuned circuit" on these old radios
but I'm not sure how critical that was. I have a nice mylar .0056mfd@
2000V in my parts box and I although I wouldn't think so, I wonder if
that might be too far off from the OEM value to do the job. Thanks,
Lenny

 

[Michael A. Terrell]

klem kedidelhopper wrote:

I'm really sorry guys. It looks like somehow almost everything I've
written over the past few weeks was (for want of a better term)
"vomited" into my last post, (which incidentally never even appeared
Here it is:

I got this set working and it actually works pretty well too. The
vibrator buffer cap though shows very slight leakage and I would like
to replace it. The original is a .0047mfd@ 1600V. I know that the cap
and transformer make up a kind of "tuned circuit" on these old radios
but I'm not sure how critical that was. I have a nice mylar .0056mfd@
2000V in my parts box and I although I wouldn't think so, I wonder if
that might be too far off from the OEM value to do the job. Thanks,
Lenny

We always used the exact value, but you may get away with it. A lot
of part warranties required it to be the exact value, and the capacitor
was cheaper than the vibrator or the transformer. They were capacitors
rated for buffer service, as well.





--
You can't fix stupid. You can't even put a Band-Aid™ on it, because it's
Teflon coated.

 

[klem kedidelhopper]

On May 3, 12:20 pm, klem kedidelhopper <captainvideo462...@gmail.com>
wrote:

On Apr 26, 3:55 pm, Meat Plow <mhywa...@yahoo.com> wrote:



On Mon, 25 Apr 2011 21:12:48 -0400, Michael A. Terrell wrote:
Meat Plow wrote:

On Sun, 24 Apr 2011 23:44:39 -0400, Michael A. Terrell wrote:

Meat Plow wrote:

On Sun, 24 Apr 2011 15:23:00 -0400, Michael A. Terrell wrote:

   A lot of old car radios used a 262.5 KHz IF to prevent image
   problems
at 910 KHz.  262.5 KHz puts them all out of band.

Old being before what year? I was just a young pup learning back in
the 70's so I don't recall a 262 IF. Probably too much LSD later on.

   Delco was still using 262.5 in the early '70s.  I could repair
   most
of their mid '60s to mid '70s AM radios in less than 15 minutes.
Some took less than 5 minutes.  I still hve most of the H.W. Sams AR
series manuals.  The cheap Japanese radios used either 450 or 455 KHz
IFs, which caused problems on 900 or 910 KHz.

Well that makes sense. I got pretty good on the Delco stuff. Mostly bad
tubes, suppressor caps, stuck vibrators, things of that nature.
Tweaking the receiver I usually did by ear going through each stage
from start to finish. Then the antenna trimmer once it was back in the
vehicle. I'm sure I have an old tube radio and a few parts up in the
attic. Used to have one on my bench for music.

   I gave away about 200 '50s through '70s car radios when I moved
south, 25 years ago. Now, most are worth $100 to $1000.

Doesn't that piss you off.

--
Live Fast Die Young, Leave A Pretty Corpse

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read more Âť

I'm really sorry guys. It looks like somehow almost everything I've
written over the past few weeks was (for want of a better term)
"vomited" into my last post, (which incidentally never even appeared
Here it is:

I got this set working and it actually works pretty well too. The
vibrator buffer cap though shows very slight leakage and I would like
to replace it. The original is a .0047mfd@ 1600V. I know that the cap
and transformer make up a kind of "tuned circuit" on these old radios
but I'm not sure how critical that was. I have a nice mylar .0056mfd@
2000V in my parts box and I although I wouldn't think so, I wonder if
that might be too far off from the OEM value to do the job. Thanks,
Lenny

 

[Meat Plow]

On Tue, 03 May 2011 10:02:09 -0700, klem kedidelhopper wrote:

I'm really sorry guys. It looks like somehow almost everything I've
written over the past few weeks was (for want of a better term)
"vomited" into my last post, (which incidentally never even appeared
Here it is:

I got this set working and it actually works pretty well too. The
vibrator buffer cap though shows very slight leakage and I would like to
replace it. The original is a .0047mfd@ 1600V. I know that the cap and
transformer make up a kind of "tuned circuit" on these old radios but
I'm not sure how critical that was. I have a nice mylar .0056mfd@ 2000V
in my parts box and I although I wouldn't think so, I wonder if that
might be too far off from the OEM value to do the job. Thanks, Lenny

The cap across the vibrator is to suppress sparking of the reed switch
contacts. Like a cap in an old auto distributer with points. They will
both pit quickly and eventually fuse together if the cap isn't present.
The .0056 should work fine.



--
Live Fast Die Young, Leave A Pretty Corpse

 

[klem kedidelhopper]

On May 3, 3:25 pm, Meat Plow <mhywa...@yahoo.com> wrote:

On Tue, 03 May 2011 10:02:09 -0700, klem kedidelhopper wrote:
I'm really sorry guys. It looks like somehow almost everything I've
written over the past few weeks was (for want of a better term)
"vomited" into my last post, (which incidentally never even appeared
Here it is:

I got this set working and it actually works pretty well too. The
vibrator buffer cap though shows very slight leakage and I would like to
replace it. The original is a .0047mfd@ 1600V. I know that the cap and
transformer make up a kind of "tuned circuit" on these old radios but
I'm not sure how critical that was. I have a nice mylar .0056mfd@ 2000V
in my parts box and I although I wouldn't think so, I wonder if that
might be too far off from the OEM value to do the job. Thanks, Lenny

The cap across the vibrator is to suppress sparking of the reed switch
contacts. Like a cap in an old auto distributer with points. They will
both pit quickly and eventually fuse together if the cap isn't present.
The .0056 should work fine.

--
Live Fast Die Young, Leave A Pretty Corpse

I put in the .0056 and its working fine. Thanks, everyone Lenny