[Elecraft] [K3] K3/0 Remote Rig QRQ / QSK performance

[Mitch Wolfson DJØQN]

Chuck,

Your answer is, "it depends".

Basically, the limiting factor is the quality of the two internet 
providers being used plus the inherent latency in any kind of internet 
situation.

You will have to add:
the internet latency between the two points (basically ping the other 
router from the control location)
+ the latency inherent in the SIP connection between the two RRC's 
(about 20 ms)
+ the latency you add to your RRC settings in the keyer and/or advanced 
settings (which can be from zero to another 20-30 ms if needed)

The RemoteRig RRC gets around the sidetone and latency issue on the user 
end by having its own internal keyer that provides your sidetone. It 
then sends a command stream in its own protocol to the radio RRC where 
in turn the radio RRC keys the transmitter. You have no apparent latency 
from the user side, but obviously this advantage decreases as you 
increase code speed. You can also key the RRC's keyer using a paddle, 
which is otherwise difficult to do in a remote situation. You can also 
key the RRC using an external keyer if you wish.

One of our users has used this system at about 40 wpm QSK and I work a 
lot of DX at 30+ with no problem, but your mileage will vary.

73,
Mitch DJ0QN

On 19.09.2013 19:30, W5UXH wrote:
> Apparently my mailman subscription disappeared, so this is a second attempt
> to get this query out there:
>
> Can anyone comment on the performance of the remote rig setup for higher
> speed CW?  If I use a keyboard keyer on the K3/0 end and CW+ QRQ mode, other
> than the latency that of course is network dependent, can I expect the
> performance to be close to that when operating the K3 directly?
>
> On the K3/0 end I assume I would hear a local sidetone from the K3/0 and
> there would not be a sidetone coming back from the remote end?  Can I expect
> the keying quality from the remote K3 to be the same as when operating the
> K3 directly?
>
> I would really like to hear from someone who actually operates QRQ speeds on
> the order of 50+ WPM who has used this setup, but perhaps that is wishing
> for too much.
>
> But how about 30 wpm or so in a "QSK style" QSO?
>
> Chuck, W5UXH
>
>
>
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> Mitch Wolfson
> DJØQN / K7DX
> Neubiberger Str. 21, 85640 Putzbrunn
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