If you don't want to DIY it, consider using a Sorensen -- some of their HV
switching supplies are incredibly inexpensive on EBay. You can also look
for the older Lambda and Kepco supplies with 6550 or 6L6 pass elements --
the one pictured on the link below will do 300 ma -- voltage is controlled
by a variac -- you have to look both at the Business+Industrial section of
the Bay as well as "Vintage Electronics".

http://www.tech-diy.com/images/lambda2.jpg

I use this microprocessor controlled power supply modification for the Heath
IP-17 -- but I figured out the compensation network so it is now beautifully
regulated:
http://www.tech-diy.com/MCTracer_no_...webversion.htm

you can (and should) increase the current capacity for the big IRFPG40's by
paralleling several units (with appropriate modifications) so that they
operate in the SOA. One is not enough for your application.



"west" wrote in message
news
I need to buy or build a bench power supply to test & design various tube
equipment (audio & ham). I would like it to be something like a Heathkit
HP-23 with voltage & current meters. The major problem with the supplies
I've come across such as the HP-23, is that the B+ current is appx. 100ma.
The bias & filament supplies are OK, but at times I need around 400ma for
the B+ out. Is there such a PS available, perhaps with tube regulation &
rectification or do I need to build from scratch? Any answers will be most
appreciated.

Cordially,
west
AF4GC

Johnson posted:

http://www.tech-diy.com/images/lambda2.jpg

Ummm... Nice work!

Harry C.