On Mon, 01 Dec 2008 11:52:48 -0500, Gary Smith wrote: >The key out from the Titan goes to the TX EN of the Omni. >The Key in from the Titan goes to the TX out of the Omni. >CW key goes to the Transceiver Key jack
I have three 425s, and have used them in contesting for years using this arrangement, which was a way of doing QSK with virtually any rig (the 425 was designed before 1980). You do NOT need to do this with the K3 -- the K3 has a built in TX delay (adjustable in CONFIG) so that the TX/RX relay in the amp has time to switch. So simply set the 425 in PTT mode and feed it the amp keying line from the K3. I'm conservative, so I set the delay for 12ms to give the relay plenty of time to switch. The default is 8ms. BTW -- the FT1000MP and others in that family also have the delay built in, so you can use them that way too. My 425s drive to full power with around 30-40 watts, depending on the band, so the K3 is loafing. Which also means that the power supply is only pulling around 10A on transmit. 73, Jim K9YC _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
