[Amps] Question about SPE 1.3K-FA amplifier

[Steve Thompson]

Most likely the 'one' transistor is actually one package with two 
transistors inside it - for example BLF578xr.

Steve


> 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