Can anyone help with this HQ-170 variation? mod?

[Rob Dunn]

Ken,

What he has is the Hammarlund Noise Immunizer, an accessory for the
HQ-170/180.  I have a PDF manual for it from somewhere, I thought it came
for that awsome service to the Boatanchor community called BAMA:).
Anyway, if it isn't on BAMA I will upload it in a few minutes.  It is about
3.45MB but it is a complete manual.

Thanks again for BAMA.  It is a phenomenal resource for those who love
boatanchors.

73, Rob, KD7HRN

----- Original Message -----
From: "Kenneth D. Grimm, K4XL" <kgrimm at ADELPHIA.NET>
To: <BOATANCHORS at LISTSERV.TEMPE.GOV>
Sent: Monday, January 21, 2002 7:11 AM
Subject: Can anyone help with this HQ-170 variation? mod?


> This fellow needs some help in identifying what he has.  Does anyone
> recognize what he is describing?  The Hammarlund Historian's web page
> seems to have disappeared and I can't find anything in any of my files
> on this thing.  Sounds like it might be a noise blanker accessory, but I
> can't recall whether there was such a thing available for the HQ-170A.
>
> >First of all, I wish to thank you for running BAMA! Finally I managed
> to get myself the >manual and schematics for my HQ170A. After the
> initial enthusiasm, some frustration: my >receiver, S/N 9705, has a 3
> tube sub-assembly that's not described in the manual. That >assembly
> includes a 6BH6, a 6BE6, a 6AL5, and two RF coils or transformers. It is
> >connected to a potentiometer coupled to the noise limiter pot, but
> controlled separately, >and seems to be connected also to the 455KHz IF
> amplifier stage. There's no panel >indication of the additional control.
> The sub-assembly seems to have been factory >installed, in fact its
> tubes have the Hammarlund name on.
>
> What do you think?  Noise blanker?  Any hard info or off the wall ideas
> will be appreciated!
>
> 73,
> Ken K4XL
> k4xl at arrl.net
> *** BoatAnchor Manual Archive ***
> On the web at http://bama.sbc.edu or
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