[Hammarlund] HQ-180 problem-not the tubes
D C _Mac_ Macdonald
k2gkk at hotmail.com
Fri Sep 26 16:34:47 EDT 2014
Way back in 1964, I installed a duplicate of National's NCX-3/NCX-5 AGC system into my HQ-145X. Simple, stable, and worked great on CW and SSB up through and including the 10m band. Made the S-meter work on CW and SSB, too!
* * * * * * * * * * *
* 73 - Mac, K2GKK/5 *
* (Since 30 Nov 53) *
* k2gkk hotmail com *
* Oklahoma City, OK *
* USAF & FAA (Ret.) *
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> From: kgordon2006 at frontier.com
> To: hammarlund at mailman.qth.net
> Date: Fri, 26 Sep 2014 08:55:33 -0700
> Subject: Re: [Hammarlund] HQ-180 problem-not the tubes
>
> On 26 Sep 2014 at 2:19, David Thompson wrote:
>
> > The AGC on SSB does pump some and perhaps the AGC upgrades WA8SAJ details in
> > the September 2014 Electric Radio starting on page 12 might help.
>
> He says it does. Furthermore, the very minor mod he suggests (adding V-7
> to the AGC line) is fully and easily reversible.
>
> In fact, from what little I know about AGC circuits, I cannot figure out why
> Hammarlund didn't do what he suggests to begin with. It is so simple.
>
> Ken W7EKB
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