[ARC5] BC-221 frequency meter

[Brian Clarke]

It is not a good idea to use a frequency heterodyne meter like the BC-221 
and the LM series as a VFO, because the output is an almost infinite series 
of harmonics. If you cut down the drive in an attempt to reduce harmonics, 
the oscillator may not start reliably. Perhaps an LPF may help?
73 de Brian, VK2GCE.

On Thursday, January 02, 2014 2:16 PM, Jim said:


I have a spare BC-221-AK that is "caseless", bookless and took a beating in 
the past, but seems to work OK. Anyone use one as a VFO? Would capacitive 
coupling and an adapter be the best way to drive a crystal-bound TX like a 
WRL-680-A?

Wool gathering............

Jim K6FWT