Well lets see
~80 amps filament
~3 amps plate current at what 7500 volt ht (depending on line voltage)
~ various ancillary hardware (fans, relays, lights, bleeders, etc)
Don't think a few extra amps of heat is really going to mater. If it did
an inline inductor would take care of it till the temps change and then
all bets are off. The other thing is a Sola can fix alot of this but
more space more hardware.
It's going to take a service to run it anyway.
Any way you look at it there is going to be heat dissipated by the unit
and the currents voltages are going to change too.
This project is 10 db above what most amateurs have ever seen. Not to
say there are serious amps out there.
Hats off to his project.
AJ___ VE3HJ
On 10/21/25 18:48, Steve Harrison wrote:
On 10/20/2025 6:50 PM, jim.thom jim.thom@telus.net wrote:
Secondary wiring now completed. The 2 x 5300 vac secondary's are also
wired in parallel with GTO-15 HV wire...(15 kv AC rated, and
uses 14
ga stranded wired).
I think I would have rathered wired them in series, because you can
bet that those transformers do NOT have exactly the same output
voltage as one another. Thus, by wiring them in parallel, you are
going to have one of them bucking or boosting the other transformer,
causing them both to draw more idling current as well as dissipating
useless power internally due to the bucking-boosting. By wiring them
in series, that won't happen, and the one at the "high end" of the
5300-volts would still have that same voltage if wired in parallel.
That's how I wired a pair of pole pigs for a good friend of mine some
years back. He first attempted connecting them in parallel but had
them drawing well over ten amps just idling that way. In series, that
dropped down to less than an amp or so. This is less of a problem with
smaller transformers simply because the current draw, when they are
very-slightly mismatched, is much less and generally
more-withstandable. But try putting an ammeter between them and you'll
easily find the difference.
Steve, K0XP
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