[Heathkit] Heath audio, rough around the edges.

[Duane Fischer W8DBF]

This would be an "excellent" thread to cut out the fat, paste together the 
various tips, and then repost to the list. This way the one file goes into 
the archives and interested parties can copy it for years to come. Somebody 
volunteer? Please.

Duane Fischer, W8DBF
dfischer at usol.com


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----- Original Message ----- 
From: "Robert P. Ward" <wardbnj at comcast.net>
To: <heathkit at mailman.qth.net>
Sent: Monday, June 19, 2006 11:46 PM
Subject: [Heathkit] Heath audio, rough around the edges.


> Hey Jim
>
> I've done a lot of modernizing to my SB104A. I did away with the diode
> mixers in the front-end and replaced them with H-Mode mixers, the 1st post
> mixer amp is replaced with a QUADJ310 amp and the AGC/IF section replaced 
> by
> Bill Carvers AGC/IF amp. The SSB/CW filters were moved to the chassis and
> are now switched by reed relays. The audio section was also totally 
> rebuilt.
> The next mod is a roofing filter post 2nd mixer (I incorporate an 
> additional
> post 2nd mixer QUADJ310 amp to help the S/N). Most of the mods mentioned
> here can be found in Wes Hayward's "Experimental Methods in RF Design. The
> next mod will replace the VFO with a DDS, that board assembly with
> oscillator is enroute from I0CG.... Will also probably replace the current
> LED display, (also a mod) with LCD. Just happen to like improving the old
> rig.
> Sorry to get off the original subject.....
>
> Bob   NQ3N
>
>
> _______________________________________________
> List Administrator: Duane Fischer, W8DBF
> ** For Assistance: dfischer at usol.com **
> $$ See the vintage area on the HCI web site - http://www.w9wze.org $$
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