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Re: [Amps] Alpha 77dx L5 help

To: amps@contesting.com
Subject: Re: [Amps] Alpha 77dx L5 help
From: Michael Tope <W4EF@dellroy.com>
Date: Tue, 3 Dec 2024 16:19:44 -0800
List-post: <mailto:amps@contesting.com>
You might try checking with John KF6I at Island Amplifiers. He services Alpha legacy products:
https://islandamplifier.com/

I agree that the material is very likely to be iron powder. If so, there is a good chance Micrometals is the manufacturer:
https://www.micrometals.com/

73, Mike W4EF......................

On 12/2/2024 7:18 PM, Greg Wasik wrote:
I have a friend in Thailand who recently zorched out L5 in his 77DX.
Believe it or not, a small lizard got into the tank circuit and when he was
tuning on 80 meters, L5 got extremely hot  - to the point of cracking both
of the torroidal cores! Does anyone know what specific cores were used or
if not, what the approximate value of inductance that L5 should be? I
assume these are iron powder cores.  I'm trying to help him remotely or
perhaps send him a replacement

Greg
K1YW


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