Mike, I have a MX-P50M and when Keyed from the Keyline on ACC2 (on the Ring and Sleeve of ACC2) works. The spec on the Keyline is 30V, 100 mA max, open drain. If hooked up the two work fine, with the KX3 set to 5Watts.
However, I did blow the 2n7002 transistor that drains the Keyline at ACC2, which I cannot attribute to the P50M. It was a PITA to replace, the replacement of the MOSFET itself is easy, but peeling off all the stuff to get to the underside of the KX3 RF board and putting all the layers back together is a b*t**. I now have a keying buffer that you can buy from RadioDan on eBay. The Kx3 plugs into the buffer, and the other end of the buffer plugs into to the PX3. If you need more details, please just ask. 73 de k1jbd Bammi > Need a little help. I just bought a KX3 and have it working OK. I also have a 45w amp that I would like to work with the kx3. However, with no info on the keying line coming from the amp, I have no idea if its Ok to use. I see in the Elecraft manual that the "keyline" and tip would be used to connect to key the amp. I can't which of the sections on a TRRS jack to use. Ring 2 or ring 3? Also don't know how much current is on that amp key line. Measured 15V DC when it is on and off measured 400 ohms, if that is any help. Any one got any ideas on this? Thanks, Mike ______________________________________________________________ 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 Message delivered to arch...@mail-archive.com
