• 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.

Anybody know these two tubes? DET-9 & Ba

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lagonda

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Joined 2004
Anybody know these two tubes? DET-9 & Ba

Hi all:
I'm a newman here. Sorry for starting with this.
An old friend gave these two kinds of tubes to me- Marconi DET-9
and Siemens Ba.
Sadly, I could not find their curves for plate voltage and current.
Can somebody seeing them help me?

Weng
 
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