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Old 31st December 2010, 04:55 PM   #1
el156 is offline el156  Portugal
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Default Will this circuit work Ok?

I would like your coments about tis circuit that i am planing for later on this winter! will it work ok?
Thanks
Silvino
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Old 31st December 2010, 05:53 PM   #2
Svein_B is offline Svein_B  Norway
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If you want to use the first double-triode as a diff-amp, you should plan for a cathode CCS, which will need a negative rail of at least some 6-8V, preferably 15-20.

You will need a bypass cap for the The EL156 cathode resistor.

If you do not have a very high output pre-amp, the input sensitivity might not be sufficient, especially if you plan some 6-10dB global feedback.

SveinB.
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Old 31st December 2010, 06:44 PM   #3
el156 is offline el156  Portugal
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Quote:
Originally Posted by Svein_B View Post
If you want to use the first double-triode as a diff-amp, you should plan for a cathode CCS, which will need a negative rail of at least some 6-8V, preferably 15-20.

You will need a bypass cap for the The EL156 cathode resistor.

If you do not have a very high output pre-amp, the input sensitivity might not be sufficient, especially if you plan some 6-10dB global feedback.

SveinB.
Thanks for your comment! Maybe i should use a ECC83 instead ECC88 to have more gain. And the Bypass cap of course!
Silvino
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