[Kenwood] neutralizing question, TS-830S

[Les Severson]

Hi Jerry,

Thank you "muchly" for reminding me the reasoning for neutralizing at 
the highest fqy..  It only makes sense now that you've explained it. 
          I'm sure others on the reflector were grateful for your 
explanation.  Also, thanks to all who wrote and told me to clean my 
bandswitch... hi
I'll be doing that tonight.

Best 73 to you all,   Les,  W�OJH

-------------------------------------------------------

Dr. Gerald N. Johnson, electrical engineer wrote:
> Since neutralization is a balancing of capacitive feedback, positive
> through the tube, negative through the neutralization network, the
> adjustment is most sensitive at the highest frequency. Also most
> necessary because the stray inductances in the two feedback circuits
> have most effect at the highest frequency.
> 
> That is to say that neutralized at 80 meters, the adjustment should be
> far less distinct than at 10 meters. Then when neutralized with that
> less distinct null at 80 meters, it might not be close enough for
> perfect PA stability (lack of oscillation) at 10 meters. That's why its
> suggested to be at 10 meters, its most sensitive to the change in
> capacitance of the trimmer and most required to be better than at lower
> frequencies.
> 
> 73, Jerry, K0CQ