• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
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    the safety precautions around high voltages.

OP Tx and PPP to PP change over

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M Gregg

Disabled Account
2010-06-28 11:04 pm
UK
Any thoughts,

On the change in distortion? THD etc...the amount of Iron in the core running at lower power..Etc?
Do you think the distortion / performance of the OP Tx would be the same at lower power using two tubes or higher ?
(Same performance just lower power)?

Regards
M. Gregg
 
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M Gregg

Disabled Account
2010-06-28 11:04 pm
UK
The idea is..

OK ...we have a PPP amp running 8 power tubes..using a switch 4 of the power tubes are shut down heaters off relay change over of OP setting..

Any thoughts...? If a high value resistor is put across the OP of the Tx it should remain stable..OP tubes set with DC bias.

Any thoughts about Cathode isolation..turning off the Cathode with a FET...or is it not necessary?

Regards
M. Gregg
 
Last edited:
Status
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.