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 **** you off.



--
Live Fast Die Young, Leave A Pretty Corpse