[Milsurplus] BC-9: Is It Halloween??

[David Stinson]

----- Original Message ----- 
From: "Mike Morrow" <kk5f at earthlink.net>

> I'd like to know what the set behavior is with that 3 mH choke 
> added >in series with the plate side of F.  If I understand 
> Dave's description, this >has not been tried. It would be 
> educational to see results after RF is >effectively removed 
> (with the 3 mH choke, and maybe a bypass >capacitor) from the 
> junction of the key and R5 and C5 and F.


I will certainly try that, Mike.  So far, I've
only used the RFCs externally on the supply
leads.  I had said before that the RFC
in the +120V side had no effect, but that
wasn't true this morning.
It was: put in the +lead or the -lead, but
not in both.  And I did make sure they were
at right angles to minimize coupling.

 > I'd like to see yet another experiment conducted without the 
added RF >choke, but with known good 1000 pF capacitors in both F 
filters.  If >that's been tried already, I missed it.
One of the .001 filter caps died shortly after
"first light" and I have bypassed it with a good one.
The other I left at full voltage on the ZM-11
overnight and it held-up, so it's still in-circuit.