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

To: Martin Sole <>,
Subject: Re: [Amps] Question about SPE 1.3K-FA amplifier
From: Peter Frenning [OZ1PIF] <>
Date: Mon, 9 Nov 2015 08:17:48 +0100
List-post: <">>
Den 08-11-2015 kl. 08:21 skrev Martin Sole:
A guess, not necessarily an educated one, its a single physical device but in fact a "gemini" pair with the two devices on a single die and in a single package.

Thats a very good guess, in fact that's exactly what it is...

On 07/11/2015 06:25, 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.


Does anyone know?

Educated guesses welcome.

73, Bill W6WRT

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Vy 73 de OZ1PIF/5Q2M, Peter

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