Re: [Elecraft] K2/XV-144 with sequencer and big amp

2010-12-05 Thread w2bvh
Hi Don, The only reason I voiced a bit of disappointment, is Elecraft is known for their attention to detail when they take on a product design. When they produced a line of transverters for the K2 I would have thought they'd upgrade the K2 firmware to add adjustable rf onset delay. They ce

Re: [Elecraft] K2/XV-144 with sequencer and big amp

2010-12-05 Thread Don Wilhelm
Lenny, Yes, this was a design "oversight" for the K2 - I will not call it a problem, since the focus was for an HF transceiver that would do QSK operation, and do it quite well. Unfortunately, that goal is not consistent with those who use transverters and mast mounted preamps. The paramete

Re: [Elecraft] K2/XV-144 with sequencer and big amp

2010-12-05 Thread w2bvh
I faced this issue just recently with a K2 and my homebrew 2M transverter when putting a used 550 W dual 4cx250 power amp into service. In the long run its best to make the mod to the K2 Don W3FPR outlines on his web page and I intend to do so some time soon. But as a quick hack to get on the

Re: [Elecraft] K2/XV-144 with sequencer and big amp

2010-12-05 Thread Don Wilhelm
Bob, No you cannot vary the K2 KEY (or PTT) closure to the onset of RF timing. It is quite close to 15 ms. Your best solution IMHO is to first key the sequencer and then use the output of the sequencer to operate the K2 PTT. That works for modes except CW. If you are using CW, the K2 alwa

[Elecraft] K2/XV-144 with sequencer and big amp

2010-12-05 Thread Bob DeVarney W1ICW
Second question. I am using my K2 and XV-144 as my EME rig. I take the output of the transverter key jack and feed it to my sequencer, which then sends the appropriately delayed signals to my amp ( 750 watts ) and my T/R relays and preamp at the tower. My question is this: Can I slow down the