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[Amps] AL-80A - Pi/Pi-L Switch Wafer Failure due to arcing

To: Amps Reflector <>
Subject: [Amps] AL-80A - Pi/Pi-L Switch Wafer Failure due to arcing
From: Bill Coleman <>
Date: Fri, 27 Jul 2018 16:42:04 -0400
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I have an Ameritron AL-80A, which unfortunately during the KH1/KH7Z expedition 
experienced bandswitch arcing when used on 17m in the 20m bandswitch position. 

The arc melted the contact on the Pi/Pi-L switch wafer. The contact at the 40m 
position is just gone, and the wiper has a bit of a corner melted off.

I have experience in replacing switch contacts, so that’s no problem, but I’m a 
little worried about the condition of the wiper. How hard is it to obtain a 
replacement switch wafer? 

Amp is still running. I soldered a bit of hook-up wire so that it is 
permanently in the Pi position — so I can’t run it on 160 or 80m. But I would 
like to fix it.

Any ideas?

Bill Coleman, AA4LR, PP-ASEL        Mail:
Quote: "Not within a thousand years will man ever fly!"
            -- Wilbur Wright, 1901

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