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[Amps] Clipperton L

Subject: [Amps] Clipperton L
From: Kelly Taylor <>
Date: Sat, 22 Jul 2017 13:07:24 -0500
List-post: <>
Hi all,

Great group of hams here. Many weighed in. 

Figured out the issue: though it came with 572b tubes, someone had swapped 
transformer secondary wires as part of an 811 conversion. Fortunately, the mod 
doesn't mess with the PS HV board, just changes two wire connections. The mod 
was featured in an old edition of CQ. (Or maybe 73.)

It's pretty clear now why I was only seeing 275 vac and 660 vac out of the 
transformer: the mod makes the old "low" setting the "high" setting, while the 
"low" setting now just accesses the difference between high and low. Access to 
the full secondary isn't here. Rewriting it is easy. 

What sense it made to give the amp access to the 275vac, I don't know.

Explains why the amp meets output specs on the high setting, too. 

73, kelly, ve4xt, 

Sent from my iPhone
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