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[Amps] 4 KW?

Subject: [Amps] 4 KW?
From: "jim.thom" <>
Date: Fri, 24 Jun 2022 11:18:59 -0700
List-post: <>
Date: Fri, 24 Jun 2022 06:14:27 -0500
From: Rob Atkinson <>
To: "" <>
Subject: Re: [Amps] 4 KW?

<Never heard of the FU728F.  My concern would be that it vanishes like
<the 4CX1600.  Interesting about the failures.  I guess the type number
<is telling.  Say "FU" out loud.


It's a chinese version of a 4CX-1500B..on steroids.  It's a popular tube
that was used in Emtron amplifiers...and is currently being used in
OM-Power amplifiers.

1 Bad review on e-ham.

Jim  VE7RF
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