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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: Bill Turner <>
Date: Sun, 8 Nov 2015 16:25:01 -0800
List-post: <">>
I think Tom, W2SC has the answer. When SPE says a "single device" they
mean a single package which has two transistors in it, and they are
running them in push-pull in the conventional manner. 

Without a schematic one can not be 100% sure, but that is the most
reasonable explanation. 

Thanks, Tom.

73, Bill W6WRT

------------ ORIGINAL MESSAGE ------------(may be snipped)On Fri, 6
Nov 2015 19:25:21 -0800, you 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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