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Comparing the ERF7530 to the 2SC2879 is like comparing apples to oranges. The FET is much better for RF use because they are much faster with less loss, thus less heat generated. The FET does not have the poor grounding and oscillations associated with bi-polar transistors which is another...

Palomar FET Amps These are just now being manufactured and are excellent amps, especially for SSB use. The transistor used in the amps is the EKL ERF 7530 100 watt FET and are easy to purchase from RF Parts. Very favorable reports have been received from the first buyers of these new amps.