[Amps] Alpha 77dx L5 help

[Carl Braun]

Ill take a look at my 77 schematics later and see if I can find a value.  In the mean time the parts list states: 

INDUCTOR (TOROID) 80m TRIPLE CORE ACX-X136 L5

Carl W9LF


-----Original Message-----
From: Amps <amps-bounces at contesting.com> On Behalf Of Michael Tope
Sent: Tuesday, December 3, 2024 6:20 PM
To: amps at contesting.com
Subject: Re: [Amps] Alpha 77dx L5 help

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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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