[Collins] 51J series input coil antenna requirements.

[Dr. Gerald N. Johnson]

On Thu, 2008-05-01 at 17:46 -0400, Bill wrote:
> How many feet is your "few" feet of wire Jerry?

Probably a 5 or 6' VOM test lead.
> 
> Perhaps we can try it on a few of our 51j-3's/4's.
> 
> My j-2 like to oscillate on a band or two when I hook it up to my
> butternut 5 band
> vertical.  But I do have a j-3 and j-4 to try.
> 
> btw: I tune mine up with a direct connection to the 50 ohm output of the
> signal generator.
> works great.
> 
> -
> Is it normal for the R388/J-3 RF stage to be unstable on bands 3 and 4
> when the antenna tuner is peaked or is my few few feet of wire too short
> an antenna to load the stage at those frequencies? E.g. should I try to
> fix it or is it not broke?
> 
-- 
73, Jerry, K0CQ, Technical Advisor to the CRA
All content copyright Dr. Gerald N. Johnson, electrical engineer