[Hammarlund] HQ-170 OSCILLATOR STABILITY

Magoo magoo at isp.ca
Mon Aug 28 12:14:01 EDT 2006


I just aligned an HQ-170 and found that it took about 4 hours for the 
frequency drift to stop.  This after replacing the 6C4 oscillator and doing 
the VR tube mod.  Any HQ-170 owners have the same experience?  My 75A-4 
settles down to the calibrated settings after about 1/2 hour, and even my 
S-40 and HQ-129X settle out after about 45 minutes to an hour.

Bill, VE3NH 




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