[Hammarlund] HQ-170 questions

[Al Parker]

Hi Jim,
    Did you get any responses?  I've been slow in getting to things here.  I
think I've got some info "somewhere" re: changes to the HQ-170's as they
went thru the evolution process.  I'll do some digging if you still need it,
I do remember that there are some ckt changes, but don't remember just
where.  I've been thru 2 of them fairly recently, and came across
differences, and some documentation I think.
73,
Al, W8UT
New Bern, NC
BoatAnchors appreciated here
http://www.thecompendium.net/radio/
http://www.hammarlund.info

----- Original Message -----
From: "Jim" <barrie@eos.net>
To: <hammarlund@mailman.qth.net>
Sent: Wednesday, November 13, 2002 12:03 AM
Subject: [Hammarlund] HQ-170 questions


> Hi all,
> I'm restoring a HQ-170, SN 1342, and it's been a lot of fun. Have run into
a
> problem and need some advise. I have a low sensitivity problem on 20,15
and
> 10. 80 and 40 works great, but the upper bands have very low sensitivity.
>
> I've peaked all the RF stages. Have replaced all the tubes with known good
> ones. Injected a signal at the first IF and got a good signal out. In
> looking at the schematic that I down loaded from bama ( HQ-170 manual,
issue
> #2) I found  that R10 (off pin1 of the 6BE6 2nd Converter) was a 33K
> resistor in my 170. The bama  schematic called for an 47K . Also R98 (a
160
> ohm off pin2 of V3) was completely missing.  All the caps are either
silver
> mica or discs.
>
> I would appreciate any help or advice. If there is anyone that has a 170
> that would be willing to look at theirs and see what they have, I'd
really
> be grateful.
> Thanks,
> Jim, WA8SDF