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MagneQuest/Peerless Forum Welcome! Need support, you got it. Or share your ideas and experiences. |
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MagneQuest/Peerless Forum Welcome! Need support, you got it. Or share your ideas and experiences. |
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In Reply to: Re: Sweet!- some answers posted by Gordon Rankin on June 21, 2004 at 13:46:59:
What is output impedance (or damping factor) for this pentode output stage with 5k trans on 8 ohm tap?? With only 1-3dB NFB I think output impedance is very high. Internal impedance for EL84 pentode tube is about 38 kohm. This transformed (lowered) 625 times in output trans and we have about 60 ohms output impedance without NFB. So in the end we need at least 20dB of negative feedback to reach even 6 ohm output impedance. I'm calculating right or..?
Girius
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- Re: Sweet!- some answers - GSI 06/21/0416:09:10 06/21/04 (0)
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