Linearity of "linear" amplifiers

December 20, 2018

K9SUL

It is affected by but not limited to the design of an amplifier.
How it is tuned and driven will also affect the result. I tried to do my best in tuning and driving these amps.

Central Electronics 600L (Single 813, grid driven)

WRL Galaxy 2000+ (Ten 6HF5, grid driven)

Drake L75 (Single 3-500z, grounded grid)

P&H Electronics LA-500M (six 12JB6A, grounded grid)

Gonset GSB-201 (four 572B, grounded grid)

SBE SB-1 LA (six 6LQ6, grid driven)