[GreenKeys] New Teletype Model 28 ASR

[William Wuttke]

Hi John, et al,

After reading all your suggestions, I think I’m going to try to make a solid-state replacement for the line relay (which I do not have). I like the optoisolators that I’m using since they are designed specifically for 20 ma loops. I believe that with the proper parts (not very many) I can make a suitable substitute using a solid state relay such as the Fotek SSR-10DD-H. This will give me 20 ma on the loop and 60 ma on the selector magnets.

Thanks to all,
Bill
KE3BK