[Amps] PS project

[Lynn]

I measured the primary current this weekend.

With the amp in an idle condition (not keyed) voltage is 5k
and plate current is virtually zero -   transformer is drawing very
low current

With the amp keyed but no drive (zsac)  plate voltage is 5kv
and current is 150 ma or so - transformer current is less than
10 amps and the  ac current meter dosent measure  this low
current very well, but  its certainly less than 10 amps.

When I send a cw signal to the amp (20 watts or so) the
amp puts out less than 500 watts and  transformer ac current
goes to 60 amps.....intermittently  ...  Plate current is less than
300 ma and still 5kv

Where is all that power going?   Its not going into the tube.  The
caps and bleeders appear normal and the rectifiers have been
replaced  just for troubleshooting.

Lynn  NO9Z

Is it possible that I need a choke input vs a capacitive filter?
The breaker has been replaced as well


Lynn   NO9Z

Merv Schweigert wrote:

> >
> >   I have almost completed a nice  5000 v   2amp supply using a large
> > Wilcox transformer with a capacitive filter.   50uf at 7kv.
>
> How much current are you drawing under load ??  5000 v at 2 amps
> (if your drawing that much) is 10KW and a 25 amp breaker is way
> to small.  If your drawing 1 amp its still too small a breaker..
> Merv