[AMRadio] Boat Anchor Receiver

[D. Chester]

>> I haven't used it on CW yet, but plan on using it on CW also.

In that case, I  would look for something like a Collins 75A  or 51J series, 
R-388, R-390 or 390A.  Those are about the only "vintage" receivers that 
have good long and short-term stability, thanks to the Collins designed PTO 
master oscillator.  Most "ham radio quality" receivers of that era drift. 
One with acceptable stability after you let it warm up for an hour or so is 
the National HRO, NC-240D and NC-101 series.  Hammarlund receivers are 
notorious for perpetual drifting due to deficiencies in the design of the 
variable capacitor module, and Hallicrafters, built with off-the-shelf 
broadcast receiver components tend to be mechanically unstable. The Collins 
S-line would be a good choice if only they had included 160m.

To me, a receiver that drifts enough to need touching up the tuning over the 
period of a QSO or monitoring session is unacceptable for CW or SSB. If you 
work AM and only AM, then about any receiver of the era is stable enough, 
but you still need to pay attention to its selectivity.

Don k4kyv

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