On Feb 26, 2006, at 12:05 PM, Tyler Stewart wrote: > Uhh, yeah...old fashioned! The diode cap thing went out with the > analog > VFO! Shhhhh! Folks still using the Ten-Tec Omni may hear you. The Omni VI may have a synthesized VFO, but FSK transmit keying is done by switching in and out a 6 pF trimmer from the 9 MHz transmit L.O.'s crystal. 73 Chen, W7AY