After a hard mechanical disaster, I decided to rebuild the old AL80 Ameritron S / N 341.
Various previous owners as well as the early phase of Ameritron PAs with their questionable wiring were the reason to take this drastic step. — The attempt to do much better was worth it !!
– Startup control of filament / filamnet now is in specification of 3-500Z
– adjustable quiescent current
– Vacuum relay in the antenna circuit
– separate power supply 3300V idle (3000V full load)
– pressurized cathode compartment
– significantly improved cooling of the tube
