power supply explanation

F Murtz · 2008-06-11T10:57:56+00:00

This news group business is a hard path to tread what with cranky australians and americans with money and magical Radio Shacks that have just what you want.Most of the replies were courteous and may have been helpful if I were into designMy existing power supply I made over fourty years ago with some ca130 op amps and a 3055.I did not design the circuit [it came from radio and hobbies or electronics australia or some such magazine]I wound the transformer myself on c laminations [I had access to a winding shop then].I etched the circuit board myself made my own case out of sheet steel Calibrated my own meter face.Only paid for components.It was 0-20 V and 0-2.5 A [you could choose volts or amps to control]I have lost this circuit and this power supply is starting to become unstable so I thought now would be the time to make something beefier.As you can gather I like making things myself from scratchPerhaps I was silly thinking newsgroups might be where I might find some clues to a suitable circuit

Jun 11, 2008 22 Replies

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Kris Krieger 18 years ago

"Bob Monsen" wrote in news:8zc4k.11628$ snipped-for-privacy@flpi146.ffdc.sbc.com:

I remembered the show, and you got my curiosity going, so I Googled it. Here it is:

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&fbc=1&parentPage=family

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Phil Allison 18 years ago

"F Murtz"

** RCA introduced the CA3130 PMOS FET op-amp in September 1974.

Your math is just as bad as your spelling and your memory.

...... Phil

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F Murtz 18 years ago

Well aren't you clever you have helped me enormously I just took a look in my supply and the meter has 1971 stamped on it. You have narrowed my search for original circuit [sometime in the early 70s era electronic magazines]

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