[Amps] Coil Tapping

[TexasRF at aol.com]

Hi Steve, yes, the tubes and rfc should be in place. The anode C of the  
tubes have a significant effect at higher frequencies and the rfc has effects 
at  lower frequencies.
 
The choke can have effects near self resonant frequencies as well.
 
73,
Gerald K5GW
 
 
 
 
In a message dated 7/15/2012 11:15:02 P.M. Central Daylight Time,  
kk7uv at bresnan.net writes:

I am  putting a new coil in my amp's Pi-Net.

I am going to use the MFJ259b on  the output to find the coil taps (as I did
a few years ago) but I've  forgotten some set-up details.



For my 3x813's, my notes  indicate I used a 2200-ohm load resistor to
simulate the plate load which  connects between the tube side of the 
blocking
cap and chassis  ground.



My questions are - do I leave the tubes in  circuit?  Do I leave the plate
choke in  circuit?



Thanks,

Steve  KK7UV

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