Tom Del Rosso wrote:

"John Larkin" wrote in

IC, CON, HDR, TR, VR, CHO, RN, RV, RLY, SW, LED and such are all
amateur inventions.

CR is still common. Is that supposed to be "controlled rectifier" (like in
SCR)?

Speaking of which, what do you use for SCR's and triacs?

SCR. Since a Triac is bilateral SCR, you could presumably use that too.

I also forgot LD or LED = light emitting diode.

Graham