>
>> TU Rich! I am also thinking about trying neutralization on the amp,
>> Maybe using a piece of solid copper from a piece of house romex wire (abt
>> 14 or 12 gauge I guess?) and running it parallel to one of the tubes abt
>> 1/2 inch away??, then to the filament choke and wrap abt 4/5 turns around
>> it in the same direction that the choke was wound then to ground???
>
>To neutralize the amp, the phase must be shifted 180 degrees.
>That would require the winding oppose the choke winding.
>
? I recommend reading what Eimac's ''Care and Feeding of Power Grid
Tubes'' says about neutralization of grounded-grid amplifiers.
>........
>You also, since the amp is a monoband amp, might be able to
>stabilize it by series tuning the grid. The way to set that up is to
>excite the cathode with a few volts of RF,
At what frequency, Tom?
>and measured the RF at
>the anode with a sensitive detector. Adjust the grid series tuning
>capacitor for minimum feedthrough.
>
... makes some sense.
Rich...
R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures
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