[Fwd: HR-10B Drift]

[Gerald C. Lemay]

I agree drift is a characteristic of most tube type gear from that era. We
now have the luxury of low frequency drift in modern equipment so going
back in time tends to be revealing to say the least. However there was a
modification article published in 73 magazine where the author solid-stated
the power supply and used the socket to add a VR tube. That cured short
term drift due to line voltage variations. On the whole, the HR-10 is good
if the band is not too crowded. There just isn't enough selectivity. To my
mind, one of the best entry level rigs of the era was the HW-16. It was
relatively stable, selective, and did everything well enough to be usefull.
That's the rig I will use at the "boatanchor" operating position.

 > Greg, Just let it warm up for an hour and it should be fine. To me,
> these "characteristics" are all part of the Heathkit/Boatanchor
> experience.....If its not stable after 30 minutes or so, then you may
> indeed have a real problem. One possible cause could be that the B+
> voltage is not regulated in these units and any voltage shift will
> cause some freq. shift. You could fix with a Zener or VR tube I guess.
>>
>> From: Greg WB8NGA <greg at BOWSER.COM>
>> Date: 2002/09/16 Mon PM 09:17:54 EST
>> To: HEATH at LISTSERV.TEMPE.GOV
>> Subject: HR-10B Drift
>>
>> Just wondering if someone has had experience in fixing
>> a drifty HR-10 receiver?  Thought that I would ask
>> first to see if someone else has seen this problem
>> before digging into my receiver.
>>
>> I have also heard of several mods for these receivers
>> but I have been unable to find them on the web.  Could
>> someone point me in the right direction please?
>>
>> Thanks,
>> Greg W8NGA
>>
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