• 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.

EL509 as a CF

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GK

Disabled Account
Joined 2006
Does anyone here have experience with the EL509 as a power cathode follower?

I’m assessing the suitability of using a quad of them parallel connected with fixed plate and screen supplies of 75V and 150V respectively and a bias current of 1.6A (provided by a RET current source) to deliver ~10W into 8 ohms as a SEP OTL.

Do these tubes draw significant G1 current? If so, how much under the above described operating conditions?

Cheers,
Glen
 
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