[Hammarlund] HQ-110 stability

[Bill Stewart]

I have a HQ-100 with the XC-455 BFO installed. However, it doesn't seem to work. So, have been trying to find whatever info was available for it....so far ND. 

As a novice in 1959, I used the HQ-100 (which I had previously used as a SWL). As I recall, it wasn't all that selective on CW (but worked well as a SWBC rcvr), which was good in one way...it made be a better cw listener. Plus, I never have gotten real comfortable with the BFO system. That paid off since I am now back to all boatanchor rcvrs, most of which require some good ear filters. These new FT-TS-IC200000s can spoil that dependency.

I have a HQ-110 and was pleasantly surprised at how well it worked. The BFO/Q-Mult is much easier to use. I like to get the Q-mult just shy the point of osc. It is fairly narrow (as compared to the HQ-100). Mine is pretty stable and works good on cw (with the ear filters). I haven't noticed any freq. jump, but does drift a bit for a while after turn-on.

Bill K4JYS 
----- Original Message -----
From: "Glen Zook" <gzook at yahoo.com>
To: kgordon2006 at verizon.net, Hammarlund at mailman.qth.net, "Greg Mijal" <bluebirdtele at embarqmail.com>
Sent: Monday, February 8, 2010 2:22:52 PM GMT -05:00 US/Canada Eastern
Subject: Re: [Hammarlund] HQ-110 stability

There was an optional "real" BFO for the HQ-100.  However, the vast majority of those receivers never had this accessory installed.

Glen, K9STH

Website:  http://k9sth.com


--- On Mon, 2/8/10, Greg Mijal <bluebirdtele at embarqmail.com> wrote:

The HQ 110 is reasonably stable for what it is. I consider it the best bang for the buck for the round shouldered Hammarlunds.  They will drift over time but sudden changes in frequency is suspicious.  Suggest you do a quck check of the oscillator voltage line, then do a complete cleaning of the tuning capacitor bearings and shaft wipers, including the bfo.  Also, you can re-seat all the tubes and de-ox the sockets.  This problem sounds like a mechanical situation, not an electrical.  FYI: a nice HQ 110 sold at my Radio Club's Saturday auction and I'm happy to report the 110 is holding it's value.  If I had my choice of a HQ 100 or a HQ 110 I would go with the 110.  Reason being is that there is no bfo circuit in the 100!  You have to push the Q multiplier into oscillation to receive CW.


      
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