In article ,
says...
Avantek Y089-4023, 8.0 - 20.0 GHz

osc supply is marked, +15, and the FM and tune coils I can figure out.

But what's the heater voltage (and approximate current)?

THanks!


My 1990 Avantek book doesn't show that part number or anything close to
it, but the heater voltage spec on all of the (many) YTOs it does list
is 20-28V. They specify power consumption rather than current: 2.0
watts at 0 degrees C, 1.5 watts at 25C.

So I'd probably try a 24V supply, current limited at about 150 mA to
start with. After the heater warms up, the current should fall to the
60 mA neighborhood. If it does, then it would be safe to assume that
the 20-28V spec applies to yours.

-- jm

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