In article , Chris Hornbeck
wrote:
On Mon, 23 May 2005 14:08:08 -0500, (John Byrns) wrote:
I am building a high voltage (1000VDC +)full wave bridge using half wave
rectifiers. Do I need separate filament supplies for each rectifier?
Typically three filament supplies are needed, one for the two tubes whose
cathodes are connected and provide the positive output leg of the supply,
with two separate filament supplies for each of the two tubes supplying
the negative output leg of the supply.
This is the classic arrangement. It gives zero stress to the
rectifiers' h-k junction (and it *is* a junction at those
temperatures and spacings.
What "h-k junction", he was talking about "filament supplies", not heater
supplies.
But it also puts large demands
on transformer insulation. That's life..
True enough, but they build them for just this purpose, and 1000VDC is
relatively low in the big scheme of things.
Regards,
John Byrns
Surf my web pages at,
http://users.rcn.com/jbyrns/