[Hammarlund] HQ129X Distortion

[jeremy-ca]

----- Original Message ----- 
From: "Skip Frolik" <frolik at gulftel.com>
To: <Hammarlund at mailman.qth.net>
Sent: Wednesday, April 09, 2008 10:11 PM
Subject: RE: [Hammarlund] HQ129X Distortion


> Evening guys,
> The mixer tube in the HQ129X I have in storage has the 6X8A mod.
> Extremely well done complete with shielded socket and tube shield.
> Now that I know this I'll keep my eye out for one of those 60's
> articles so I can put a copy in the documentation for the receiver.
> Thanks again.
> Skip
> WB4GMQ

I had a feeling it was that one; its a good conversion. Its from CQ in the 
early 60's; I dont have the reference handy to be exact.

Carl
KM1H


>
> -----Original Message-----
> From: jeremy-ca [mailto:km1h at jeremy.mv.com]
> Sent: Sunday, April 06, 2008 9:23 PM
> To: Skip Frolik; Hammarlund at mailman.qth.net
> Subject: Re: [Hammarlund] HQ129X Distortion
>
> There were several mixer mods in the ham rags thru the 60's. A popular one
> used a 6X8 (6U8A/6EA8). It could also have been an adaption of any number 
> of
> other circuits with a 12AT7, 7360, etc.
> In recent years the Pullen mixer has had a renaissance with the 6ES8 being
> an excellent choice.
>
> A less complicated swap for an original 6K8 is the 6SB7Y which gives a 
> nice
> improvement but not earthshaking. BUT then change the RF amp to a 717A and
> the old girl will wake right up and compare(or excel)to the 140X and 
> similar
> miniature tube offerings.
>
> Carl
> KM1H
> -----
>
>
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