Charlie, The easiest way to accomplish what you need is to inhibit the paddle input to the K2 until your sequencer has completed its tasks. A set of relay contacts in series with the paddle lines will do that. You may have to use some kind of auxiliary circuits to start the sequencer - I have no idea how that is accomplished in your station - if it is accomplished with a manual switch then the solution already exists, take the "OK to transmit" signal from your sequencer and use it to activate the relay.
For a more complex solution, take a look at my website http://w3fpr.qrpradio.com article on PTT for CW. That circuit handles SSB and CW seamlessly (but again, you must have something of your own choice to start your sequencer). 73, Don W3FPR > -----Original Message----- > Hello All, > Can anyone help with ideas on how to set up manual > switching to Tx in CW mode. I wish to put the K2 into Tx > without sending ANY RF to allow my Transverter time to run > through it's fully sequenced switching. > > At present every time I hit the CW key, a burst of RF gets > shunted up the back end of the last receive amplifier stage in my > transverter for about 700ms before full Tx switching occurs in > the transverter. > As yet I haven't "blown" any devices up as I have placed Back > -to-Back diodes to limit the RF voltage that the MMIC in the IF > path sees. However I feel there MUST be a more ele-gant > solution! ( I am using my K2 for EME purposes, so it is more > important to look after the LNA then the transverter IF chain) > > It is a pity that there cannot be a delay placed in the software, > or otherwise, on when RF actually begins to appear once the K2 is keyed. > > Anyone driving a QRO amp. resolved this problem. I suspect not > too many running the 100 W version of the k2 to drive a 1500W amp > would be happy to have the instantaneous RF on their output relays? > > Perhaps I have missed something about this along the way? > > Regards > Charlie > VK3NX > _______________________________________________ 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
