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.
>
>Website: http://www.spetlc.com/en/products/expert-13k-fa-uk.html
>
>Does anyone know?
>
>Educated guesses welcome.
>
>73, Bill W6WRT
>
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