Subsitute Tubes for T-40 and TZ-40

[kd4e]

This one?

http://www.w8tow.com/Taylor1.html

Quite a piece of handiwork!

Those tubes look a like 813's.  WDYT?


> I have some transmitter designs using the above tubes,
> and wonder what a modern equivalent is for both tubes. 
> Joe W4AAB(new member)

-- 

Thanks! & 73, doc, KD4E
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