Re: K3 full-duplex- I asked Wayne about this today, at Visalia.
It's theoretically possible in the hardware, but there's a LOT of software/firmware necessary, and no one is working on that.
It MAY happen, but NOT soon.
73, doug
From: James Duffey jamesduffey@comcast.net Date: Sat, 17 Apr 2010 08:13:22 -0600
Can the K3 do full duplex in the same band? Elecraft's FAQ seems to indicate that they do not support this mode:
"Can the subreceiver provide unbroken audio using any antenna input while the K3 is transmitting?'
"This is "full duplex" operation, which is very difficult to do inside a single cabinet. However, it may be possible if you're using the transverter I/O (0 dBm TX power). We'll be testing this case and will post full specs later."
Does the firmware support this?
I am very interested in your experiments. Will you need to modify the DEMI transverter IFs? - Duffey
On Apr 17, 2010, at 12:44 AM, Edward Cole wrote:
Of course, each to his own choice.
I decided on the K3/10 (10w version of the K3), with subreceiver and transverter interface (and a few other goodies) ...total $3000 Add a new DEMI 144/28 xvtr $500, and later a DEMI 432/28 xvtr kit $400. These are the new design to be released in early June. I added a ARR 50-Mhz preamp and building a 300w HF amp kit (cost $150).
When I have fully investigated running the K3 for full duplex under sw control I will consider letting my FT-847 go. Keeping it for now (also because I will not get the 432 xvtr right away).
Why not the Flex-500 + U/V? Well, cost is one, and the need to have a computer was another. I will use my 6-lb. K3 for portable mw operation (mainly CW) so its size, weight and ability to be fully used without toting along a computer.
Undoubtedly the K3 and Flex-5000 are the top radios in the amateur market as far as performance specs. I've had my K3 for about a month and am still learning more about it. Its a keeper. (better be as I will never spend this much on ham radio, again)
73, Ed - KL7UW