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Re: [Amps] Question about SPE 1.3K-FA amplifier

To: Amps group <>
Subject: Re: [Amps] Question about SPE 1.3K-FA amplifier
From: Richard Solomon <>
Date: Sun, 8 Nov 2015 06:59:35 -0700
List-post: <">>
Here is a link to what looks like the Test Report for
FCC Type Acceptance.

Curious as to what folks think about the results.

73, Dick, W1KSZ

On Fri, Nov 6, 2015 at 8:25 PM, Bill Turner <> wrote:

> I notice the SPE 1.3K-FA amplifier is using a single LDMOS transistor
> to achieve a peak of about 1500 watts output. I am wondering how they
> do this and stay linear over the full 360 degree RF cycle. Normally
> with a single-ended amplifier you have to either use a resonant tank
> circuit to provide the "flywheel" effect, or run it class A. Solid
> state amps normally use two devices in push pull but this amp does it
> with only one.
> Since SPE apparently does not provide schematics or service manuals, I
> am left curious as to how they achieve linearity.
> Website:
> Does anyone know?
> Educated guesses welcome.
> 73, Bill W6WRT
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