The the 2 NEC Dual photo-transistor Output Optoisolators specified in the specs for the W5XD Multi-function keyer are no longer available from Digikey. Does anyone know of an alternate source for the
NTE makes a good dual optoisolator in 8 pin DIP that I use for my RTTY FSK keying and PTT. Pinout compatibility is unknown by me. Bought mine at Fry's, where there is a NTE book with diagrams. 73 Art
I ordered a Dual opto from Digikey: MOCD207-MQT-ND which looks like it might work but the backorder time is to 8-21-2000. It is manufactured by QT Optoelectronics. The remaining duals were either not
There are one or two others on that catalog page that would appear to be compatible, but only W5XD knows for sure. At least one (PS2561-2-V-ND) was in stock at more-or-less the same price. Try at you