TRIAD transformer 570VAC output
High voltage plate current and filament transformers primary has taps
for 121, 115, 105, 100, 96, 87, 78 VAC
Secondaries: 570V (810 VAC max using taps) and 6.3 VAC 2.8 Amps.
Designed for aviation receivers.
Can also be used for a classic CRT clock HV supply by driving with 400
Hz audio signal.
$9 plus cheapest shipping