I would like to build 2 or 3 solid state power supplies that can be permanently installed in battery sets. Can anyone point me to a diagram with specs for such an animal?

I would like it to supply 45, 90 and 135 volts. Bias voltage would be nice but I could always use modern batteries for that.

Initial application intended for a Radiola 20, a Grebe Synchrophase and a Kellogg if I can ever find tubes for it.

Take a look at the schematic for the battery eliminator sold by AES, www.tubesandmore.com

You could build if from scratch with parts bought separately. But the individual parts may cost more than the kit?

If you are looking for a battery powered supply, consider these links:

http://www.portabletubes.co.uk/sitefiles/ausbatt.htm
http://www.batpack.com/

If you are looking for AC Powered supply, check
http://www.tubesandmore.com/ search under "Power Supply kit"

Here is another link for a similar supply circuit:

http://www.ka7oei.com/ak20c_ps.html

:I would like to build 2 or 3 solid state power supplies that can be permanently installed in battery sets. Can anyone point me to a diagram with specs for such an animal?
:
:I would like it to supply 45, 90 and 135 volts. Bias voltage would be nice but I could always use modern batteries for that.
:
:Initial application intended for a Radiola 20, a Grebe Synchrophase and a Kellogg if I can ever find tubes for it.
: