[AMRadio] Modulator question

Paul Baldock paul at paulbaldock.com
Sat Jan 30 20:31:21 EST 2016

I'm building a modulator using two EL34s.

I am testing it in to a matched resistive load. The output between 
30% and 100% of max (50Watts) gets quite distorted. Driving with a 
sine wave the grids look good, but the output starts to get more 
triangular the harder you push it.  FYI the plate voltage is about 
660V and the screen tapped at around half of that.

Any thoughts from you audio buffs?

- Paul   KW7Y

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