[Amps] Follow-up...re: Time to ask for help.

[Bill Turner]

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On Mon, 27 Jul 2015 13:15:23 -0500, Don wrote:

>
>Somewhere, I saw a neutralizing circuit that used a ten turn toroid  
>between ground and a small pf value capacitor to the output network.
>
>Another ten turns ( 180 degrees out of phase ) on the toroid went  
>between ground and the input circuit through a small pf capacitor.
>
>Amplitude was controlled with a capacitor from ground to one of the  
>legs of the toroid.  I imagine a variable resistor across either side  
>of the toroid would do the same thing on a single band amp for six  
>meters.

REPLY:

I see a potential problem with that. Having only the single variable
capacitor will case a phase shift when adjusting it. By comparison the
bridge neutralization circuit with it's two voltage dividing caps will
not. 

I think. :-)

73, Bill W6WRT