HiButch, Do not hook the K3 directly to the 30L-1. The K3 only switches positive voltages to ground on TX. Hooking up a negative voltage will not work and may damage the Keyout keying transistor.
An external relay or a negative voltage keying transistor buffer are the best ways to do this. Butch Schartau wrote: > I want to use a Collins 30L-1 amp with my K3, when I plug the 30L-1 amp > control cable into the K3 KEY OUT jack, the 30L-1 keys. The 30L-1 is keyed > by grounding it's key line (pulling -160 DC to ground). The K3 specs says > +200 VDC, at 5 amps, I guess the K3 does not like the minus voltage on the > 30L-1 key line, any suggestion other than an external relay? > > Butch K0BS > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
