Jack, Unless you have a problem with the K3, the KEYOUT jack should have no voltage on it either during TX or RX. Check the KEYOUT with an ohmmeter. It should have a high resistance during receive - then put the K3 into TEST (hold the MODE up button), then press TUNE - the resistance should drop to almost zero.
With no cable connected to KEYOUT, you should not see any significant voltage at the K3 - if you do, double check your DMM connections. Any voltage during key-up (or RX) will be coming from whatever you connect to KEYOUT - KEYOUT simply grounds the connection when TX is enabled. 73, Don W3FPR Jack Nelson wrote: > Good evening. I'm attempting to use my K3 with a Tokyo High Power HL-1.2Kfx > amp. On the amp, when STBY (which has 12v on it) is grounded, the relay > clicks, and the "On Air" led lights....just like it should. However, when a > cable is connected between the K3's Key Out jack, and the STBY on the amp, > the amp shuts down with an "Over Drive" warning as soon as the K3 is keyed. > The K3's power is passed through the amp to the watt meter and dummy load. > > I noticed the Key Out jack on the K3 has 4.75vdc on it whether it's in the > Tune position or not. Is this normal. I don't think the amp likes seeing the > voltage from the K3. > > 73's Jack K5FSE > Treas QRP ARCI > > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
