[Hammarlund] drift of receiver HF oscilator

[John King]

 Has anyone made the oscilator crystal controlled or
ever saw a modification for that? Seems that the
oscilator could be crystal controlled. I have HQ 120,
HQ 129Xs, HQ 140xa, HQ 150, HQ 160, three or four HQ
170s, HQ 180AX and SP600 JX 16. Recently acquired
hammarlung four-twenty xmtr and four-11 AM modulator.
Would be interested if there is a mod for crystal
control of the drifting oscilator. 73, John, K5PGW

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