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Old January 7th 04, 07:00 AM
Gregg
 
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The procedure to neutralize an amp is pretty universal.

The purpose is to cancel the feedthrough RF from the driver via the Cg-p
capacitance.

Disengage the B+ to the PA (plate and screen for tetrodes/pentodes),
but keep the plate tank connected.

Transmit into a dummy load with power meter inline.

Adjust neutralization cap until tuning the plate tank circuit through its
range causes absolute minimal or no output.

Unit is now neutralized and B+ can be reconnected to the PA and you are
ready to rock!

--
Gregg
*It's probably useful, even if it can't be SPICE'd*
http://geek.scorpiorising.ca
 
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