• 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.

Can i build Phonostage with AD1 DHT like this?

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#21
Kay Pirinha said:
I think it has previously been said umpzillion times that even a 12AX7 design (µ = 100 per triode) is marginal by today's standards. So, why tinker with low µ pre WWII tubes and a DHT 😵 close to the beginning of a signal chain? I think it's much better to leave REN904's and especially the scarce and expensive AD1's to radio restorers.

Best regards!
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I think you have a point here.
 
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