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Need Pyramid P/S schematic

Looking for a circuit diagram for a Pyramid PS-50, 12-15V dc @50Amps supply.
This is marked as having been made by Tenna and has both voltsage and
current meters.

Any help appreciated to get this thing operational.
Thanks
Ralph VE3BBM

Need Pyramid P/S schematic

"Ralph Cameron" wrote in message
...
Looking for a circuit diagram for a Pyramid PS-50, 12-15V dc @50Amps
supply. This is marked as having been made by Tenna and has both
voltsage and current meters.

Any help appreciated to get this thing operational.
Thanks
Ralph VE3BBM
Ralph -

I have never seen Pyramid or Temma release to the public their schematic
diagrams (BUT Astron does -- support & quality)
http://www.repeater-builder.com/astr...ron-index.html

IF this is a linear power supply (large heavy transformer) -- a majority of
these designs are based on the common "723" regulator chip [IC] (originally
designed by Fairchild Semiconductor in the 1970s) with 2N3055, 2N3771 or
2N3772 transistors on external heatsinks serving as the "pass" transistors.
[LM723 is the Signetics number]. Pyramid likes to solder this chip to PC
board-- which I replace with socket for future service.

You will find most of the information you require on the KBT DC Supplies web
site
http://www.kbt-dc-supplies.com/index.php

David Metz's classic 1996 web page on linear power supplies.
http://www.seits.org/features/pwrsup.htm

g. beat
w9gb

Need Pyramid P/S schematic

On Sun, 18 Dec 2005 10:39:58 -0500, Ralph Cameron wrote:

Looking for a circuit diagram for a Pyramid PS-50, 12-15V dc @50Amps supply.
This is marked as having been made by Tenna and has both voltsage and
current meters.

Any help appreciated to get this thing operational.
Thanks
Ralph VE3BBM

I have a schematic of the Pyramid PS-25G that I can scan and E-mail.
Let me know.
73 de Sieb VE3JUA