[Milsurplus] VT-25/10 subs?

[Kenneth G. Gordon]

I have recently been offered the chance to get a pristine, but tube-less, BC-375, with TUs.

I have plenty of good VT-4Cs here but no VT-25/10.

Is there a substitute for this tube which could be used by simply building a base-adapter?

Ken W7EKB

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