[Hammarlund] HQ-180 sounding right?

[GRANT YOUNGMAN]

On the surface, it sounds like the AGC isn’t working.

Check the AGC-related tubes (v8/v16 — probably v8), and if that doesn’t fix it you may have a fault on the AGC line.  Does it work properly on SSB?  Does changing AGC speed in CW have any effect?

Grant NQ5T


On Sep 24, 2014, at 7:51 PM, Robert Sauvan <rsauvan at beyondbb.com> wrote:

> Hi all,
> I have been working on my HQ-180 over the last couple of weeks. I did an alignment on it and it seems to be working and tracking frequencies just fine. But, I am questioning somewhat if it is really working right. When I tune in CW I am finding what I feel is quite a bit of distortion on CW signals unless I turn the RF gain almost, if not, all the way down. I can play with the BFO and vernier tuning and get the tones a bit better as well, but when I do, I just dont feel I have the correct tone that I like to listen to. Im wondering if a filter of some sort is not working correctly or something like that. Lots of signals seem to be extremely loud as well. Most would probably say, thats great, but Im not sure it is really the way it is supposed to be.They almost sound as if they are overloading the receiver. I have a dozen 6C4 tubes that I have swapped over and over. These dont seem to be an item I think to be an issue. I have swapped a couple of 12AU7 tubes in the product detector and I have found one to be terrible and make things worse but I only have 3 altogether and 2 are in the radio. One in the product detector and one in the bfo meter position. Possibly the 2 I have in the radio are not that great either but wouldnt know unless I had some replacements to try. Could I have a problem in my product detector? I would love to hear if I am expecting something that I dont need to cure or maybe have an idea what could be wrong if there is an issue. Any advice would be greatly appreciated.
> 
> Thanks-Bob-W0YBS
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