caps in 60's radios

caps in 60's radios

Post by Michael Hamilto » Mon, 22 Apr 2002 23:54:57



I've got a Steelman Hi-Fi, I got the Sams for it, and it appears to only
have 4 wax caps, besides the filters.  There are 35 all together, and the
rest seem to be in mmfd, and from the picture in sams, seem to be creamic or
mica.  I have not been able to see the chassis in person yet, I'll be able
to see it in June when I go visiting.  Is this common to find very few wax
caps for a radio of this era (sams date 4-60)?

I can scan the schematic if anyone's interested.

Thanks,
-Michael
(remove "GUESS" to reply)

 
 
 

caps in 60's radios

Post by Uncle Pete » Tue, 23 Apr 2002 00:37:49


Hammarlund used ceramic discs almost exclusively in their 60s vintage
communications receivers.

The problem with hi-fi gear is that I would expect they would use something
besides ceramics in the audio chain to avoid distortion--cermanic caps
exhibit a slight varicap action as applied voltages change.  They usually
aren't the first choice for audio stages.

I'd expect to find Black Beauties or  wax caps for the audio coupling in the
preamp and audio power stages.

Pete


Quote:
> I've got a Steelman Hi-Fi, I got the Sams for it, and it appears to only
> have 4 wax caps, besides the filters.  There are 35 all together, and the
> rest seem to be in mmfd, and from the picture in sams, seem to be creamic
or
> mica.  I have not been able to see the chassis in person yet, I'll be able
> to see it in June when I go visiting.  Is this common to find very few wax
> caps for a radio of this era (sams date 4-60)?

> I can scan the schematic if anyone's interested.

> Thanks,
> -Michael
> (remove "GUESS" to reply)