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The Toshiba spec sheet rates the 2879 at 120 watts.

I can attest to the fact the a single 2879 will do double that without a doubt.

The " test jig" that Toshiba used to produce that number has been called poor by a well known RF engineer that has been designing and building amplifiers for years.

This same engineer bolted a single 2879 to a large heat sink using a soft copper gasket in a single ended class c amplifier circut and at 5 MHz this single transistor pulled 30 amps at 18 volts and produced almost 300 watts output regardless of what the spec sheet says.

For those that will say that it is all harmonics his testing showed that Less th a 10% of the signal contributed to the total output.

His call sign is W8JI

Have a look here:

https://forums.qrz.com/index.php?threads/2sc2879-producing-250-watts-hahaha.248732/page-6

The Toshiba spec sheet is not the final word on these transistors.

I have run these same devices at 20 volts more that once and they survived with no magic smoke released.

It is an extremely rugged transistor that exceeds anything ever posted in a spec sheet.

You would be surprised at how much abuse they could take.

It is a shame Toshiba stopped making them and the clones that are on the market today will never equal the original design.

73

Jeff