19-09-2018, 04:52 PM
Hi Ed.
Valve spec is 40mA Ia with 180 ohm cathode resistor, 4.85W. In the 808 it runs a 250 ohm resistor.
I'm guessing a primary of round 2100 turns, secondary 50 turns but the bobbin must have been tiny.
Sam.
Boater Sam.
