• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

Will this circuit work Ok?

Status
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
Jump to Latest
S

Svein_B

Member
Joined 2005
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.
 
el156

el156

Member
Joined 2010
Svein_B said:
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.
Click to expand...
Thanks for your comment! Maybe i should use a ECC83 instead ECC88 to have more gain. And the Bypass cap of course!
Silvino
 
Status
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
Top Bottom