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Re: [Amps] AL82 3-500 4-400

Subject: Re: [Amps] AL82 3-500 4-400
From: Alek Petkovic <>
Date: Wed, 27 Jan 2021 05:26:03 +0800
List-post: <>
I've run one in an AL80B, for testing purposes, while I was repairing the amp for another ham.

I also plugged in a Philips equivalent of the 4-250A.

Both the 4-400 and the 4-250 worked OK but with lest output than the 3-500Z.

Suck it and see. You won't break anything by trying.

73, Alek. VK6APK

On 27/01/2021 4:35 am, Robert W5AJ wrote:
Have Ameritron AL82 amp, No Tubes

Have extra Eimac 4-400 tubes

Looked at some amp's schematics for 4-400 and appears these would work in

Have fired up filaments in AL82 (no HV)

Any one tried this or have go/no go thoughts?

73 W5AJ


Midland, Texas

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