[CQ-Contest] Optocouplers

Mark - K5AM k5am at zianet.com
Sat Jul 4 12:05:57 PDT 2009

At 2009-07-04 17:03, Dave Hachadorian, K6LL,  wrote:
>I had trouble using optocouplers. They wouldn't key the rig.   . . .


A reliable system using optocouplers appeared in:

QST, Sept 2004, 28-33.

The expanded version, with schematics and details, is available at:


Best regards,

Mark, K5AM

More information about the CQ-Contest mailing list