[HBR] [Glowbugs] Quartz Crystal Oscillator

[n2ey at aol.com]

-----Original Message-----
From: John Landrigan <jlandrigan at pol.net>



The next grandiosity is to find a means to develop a 2nd oscillator that will 
mix so that an output will be made available to either an 85 KHz IF or 50 KHz 
IF. It seems like the finding of crystals specific for 1685 KHz and 1650 KHz is 
not going to happen in this lifetime. 

Maybe not - but there are other possibilities.

You could use 842.5 kHz and 825 kHz xtals in a pentode oscillator (modified-Pierce, grid-plate) and double in the 
plate circuit. Or  561.667 kHz and 550kHz xtals and triple. There are probably FT-241s in those ranges. 

73 de Jim, N2EY