wrote:

I would look at thrift stores like the Goodwill for an old colour TV
(tube type) and
salvage the power transformer out of it.

Sadly, most of those were hot chassis.

However, a very interesting device is the microwave oven transformer.
110V in, 1KV out, varying from half a kilowatt to a kilowatt. The
transformer core is split so you can easily take turns off to lower the
secondary voltage, too.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."

Steven,

Pretty cool power supplies, thanks for posting the .pdf file.

One question though, what is the pentode labeled V1 on the third
schematic on the fourth page. It is marked "6AM" 6AM5? 6AM6?

TIA,

steve

Hello:
A good tube for thisapplicattion is a 6336B
Look at
http://www.deremate.com.ar/accdb/Vie...sp?IDI=9835995
Regards

Heriberto

"Chris Suslowicz" escribió en el mensaje
...
In article ,
(Steven Swift) wrote:

The best high current PS I have seen uses the same topology as the GE
1-compactron one but uses several 6080 (6AS7) in parallel.

6080s are good for this. I used to have a regulated supply from an old
Ampex VR-1000 (2" reel-to-reel VTR) that delivered 250V at 6.5A.

I have an
old transformer I am saving for that kind of thing that puts out
650Vct at 850mA. I have a TV transformer that is 550 at 250mA, but it is
being saved also. That's alot of iron.

At the end of the day, the transformer is goung to be the biggest (and
certainly the heaviest and most expensive) single component.

Quality does not come cheap.

Chris.

writes:

Steven,

Pretty cool power supplies, thanks for posting the .pdf file.

One question though, what is the pentode labeled V1 on the third
schematic on the fourth page. It is marked "6AM" 6AM5? 6AM6?

TIA,

steve

It is base diagram 6AM, which means any number of big horizontal output
tubes like 6BQ6, 6CU6, etc.

I was looking at the schematic for a Fluke 407. They did a smart thing. When
they paralleled tubes for more power, they series the filament, so that if
one burned out, the output went off rather than burning up the next tube.

Steve.
--
Steven D. Swift, , http://www.novatech-instr.com
NOVATECH INSTRUMENTS, INC. P.O. Box 55997
206.301.8986, fax 206.363.4367 Seattle, Washington 98155 USA