[Collins] More re: 6146/A vs 6146B/W

[Dr. Gerald N. Johnson, electrical engineer]

Except that Dennis used a 12 pf variable (which can either accommodate
the wildest 6146B or W or make for touchy neutralization) where Collins
used an 8.1 pf variable, (then 2 watt resistor instead of 1 watt and 6
KV fixed capacitor instead of 2 KV) this is the difference between early
32S and KWM-2 and the '78 KWM-2 manual. It should be a little more
stable with heating and with the large capacitor should have enough
range to accept the variations in later less well controlled tubes.

PA neutralization won't have any effect on how it hears though.

The changes chronicled in part 7 of the on-line KWM-2 manual do make
interesting reading.

73, Jerry, K0CQ
-- 
Entire content copyright Dr. Gerald N. Johnson, electrical engineer.
Reproduction by permission only.