your 735v and 145mA comes up 5k, as your OT says, what I'm hung up on is the fixed bias, how does -30 yield either your plate Volts or current? straight off loadline plotting? (no I didn't plot it)i threw a dart at the published curves. IOW, a SWAG as the curves are ratiometric - and i cheated: see PRRs last post. also the reason i allowed up to -40V adjustment of the bias supplies
. i'll start with the KT120 filaments warmed up, power up the up the bias supply set to -40V, then i bring up the main transformer slowly with a variac. this all assuming of course, i'm near the target for the Vg2 and plates supplies.
i will be working alone, so as learned from my days at crydom/silicon power cube, i'll be working with one hand behind my back, with safety glasses, wearing rubber soled shoes.
it will be interesting to see if these things hold up to 700+ volts to the plates. an expensive experiment, relatively speaking, but entertaining nonetheless. no wife no kids, so need something to do to pass the time...
also, can I use -30 to calc Rk for self biased? (30v/.145=207ohms)?yes, you can use that value as a staring point, but i'd start with 40V and work my way down. use a rheostat and/or handful of power resistors.
the transformers were available from mouser. < 24 hours from mansfield tx. to my door via UPS. they were setting on my porch when i got home this afternoon.
--pete
