[Milsurplus] Ext.VFO + BC610

[Mike Clarson]

As Rolynn noted below, the BC-610 was quite stable except under certain
conditions. One such condition was when this venerable old workhorse was put
into service aboard spacecraft in the 1960's before high powered solid state
transmitters became practical. The drastic changes in atmospheric pressure
required that the tuning units be relocated/remoted into the passenger
cabin. Below is a link to this application of the BC-610 where the tuning
units are clearly visible in the spacecraft cabin about 15 seconds into the
clip. Enjoy. --Mike, WV2ZOW

http://www.youtube.com/watch?v=SQ_VYvAaI7E 



-----Original Message-----
From: ROLYNN PRECHTL K7DFW
Sent: Tuesday, January 01, 2008 7:37 PM
To: milsurplus at mailman.qth.net
Subject: Re: [Milsurplus] Ext.VFO + BC610

>First I have found from much operating in both CW and AM modes that the
tuning units are quite stable IF the transmitter, has a stable mains source,
at the rated voltage for the model in question.

==============================

That's the way I operate my pair, an F and a G. Use the tuning units and
have no problems with one 610 on 40M and the other 610 on 20M. Did
externally mount a Jackson Drive on the 20M tuning unit to make it easier to
adjust the freq. This didn't butcher the tuning unit and it's 100%
reversible.



K7DFW