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bob, is the amplifier emitter resistor AC bypassed and is their a base resistor too? I'm guessing the Amp is being baised "B" or "AB".

I would probably add a large value load resistor in parallel with the emitter - capacitor - resistor juntion. This will stabilize the transistor and bleed off capacitor charge when turned off.

PSPICE is a pretty good tool for simulating circuits as long as the models are accurately specified/built.

If you get a chance to post some part values, that would help too.

[QUOTE="ken white, post: 164843, member: 2405"] bob, is the amplifier emitter resistor AC bypassed and is their a base resistor too? I'm guessing the Amp is being baised "B" or "AB". I would probably add a large value load resistor in parallel with the emitter - capacitor - resistor juntion. This will stabilize the transistor and bleed off capacitor charge when turned off. PSPICE is a pretty good tool for simulating circuits as long as the models are accurately specified/built. If you get a chance to post some part values, that would help too. [/QUOTE]

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