Digging into the CTC-9

[jeyurkon]

Originally Posted by Phil Nelson

When I replaced the rectifier on my CTC-11 board, I got two opinions.

One guy said he used "ordinary power supply diodes," which I took to mean 1N4007.

Another said those are too slow and sent me some "fast slew" diodes (his term) which I installed. Hard to read the type number when they are installed, but it may be 1937. At least, the last three digits are 937.

If you have a bunch of 1N4007 lying around, you could try those and see what happens. Pretty cheap experiment as long as you don't fry the board.

Phil Nelson

Guess he meant "fast recovery." Any chance those are 1N4937's?

John