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Sophia 300B Tube Needed

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Rush

Rush

Member
Joined 2009
Imago said:
For some reason one of my Sophia 300B tubes is failing to light the filament.

Anyone have a single they'd like to sell?

Mine are the globe shaped, black base, mesh screen version @ 5V.
Click to expand...


I have one Sovtek 300B I would like to get rid of. Not much use on it.
It is marked 53mA/ 5.3 mA/V which I am not sure what it means. I suppose a way of matching, but don't know the parameters. Should not matter for single ended operation though.
The mate to it has the same issue as your bad tube.
PM me if interested.

Rush
 

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