[Amps] Coil Tapping

[bill wylde]

Steve,

I tried to respond direct, but the e-mail bounced.  Had a bunch of photos
of the three to six 813 amps that we have built in the past couple years.
Included was some info that I thought you might be interested in.

Leave the tubes in the sockets, remove the plate caps, and go to ground
with your chosen plate load.

Bill

-----Original Message----- 
From: Steve Flood
Sent: Saturday, July 14, 2012 10:50 AM
To: amps at contesting.com
Subject: [Amps] Coil Tapping

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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