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Old 1st June 2002, 01:25 PM   #1
LuisMCP is offline LuisMCP  Spain
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Default Class of operation measuring

Hello:

How to measure if an PP amp is working in class A?

The amp is cathode biased in Ultra-Linear mode.
Tubes are KT88, Rk = 390 ohm, Vak = 354V, Ia+g2 = 82 mA
and Vg = -32V

Raa is about 6k

On the other hand, i've no find plate curves for KT88 in UL mode.
I've used the plate curves for KT88 in triode mode instead for approximation.

Thanks in advance.
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