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1st June 2002, 01:25 PM
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diyAudio Member
Join Date: Jun 2001
Location: Madrid, Spain
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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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