> The differences between an 807 (the one without the
> pop top) and a 1625 was 12 volt filament on the 1625
> and it also had 7 pins versus 5.
807's are really nothing but a slightly modified 6L6G.
They even share the same cathode and other elements as some
productions of the 6L6, and even have the same heater
current.
The 807 brought the anode out the top to increase voltage
breakdown and make a better RF path and had some variations
in insulation and envelope, but it is still basically a
slightly modified 6L6.
73 Tom
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