All: I recall that a March 1947 QST had an article in which one could convert a BC-221 (or any LM frequency meter, for that matter) into a truly stable VFO. Does anyone have a copy of this in pdf format? I'm looking to use a converted LM-13 for a 10 Mcs VFO as well as a VFO for my Central Electroncs CE-20A transmitter. Thanks. Cal, n6KYR/4.