[Elecraft] K3 RX Antenna & QSK

[Vic Rosenthal 4X6GP/K2VCO]

I just tried it at speeds from about 24 to 35 wpm. As you say, not much 
difference in what you hear and a big reduction in relay operations. 
0.005 extends the useful speed range downward without changing what you 
hear much.

I'll try it in the next pileup and see if I think it matters. I have two 
relays in my amp and the one in the loop, and the less work they do the 
better.

On 1 Feb 2015 15:58, dmb at lightstream.net wrote:
> Is there a significant benefit to running full QSK at speeds >= 30 WPM as
> opposed to just running break-in w/ a delay of 0.04? I use the Pixel loop
> here on 40 and 30 meters w/ my K3, and doing the latter saves a lot of
> relay operations. Although you won't hear the band between keying
> elements, you will definitely hear it between letters.
>
> No sarcasm intended w/ my question; just trying to understand when and how
> full QSK provides a benefit over break-in w/ minimal delay.
>
> 73, Dale
> WA8SRA
>
>
>
>> The Pixel can be connected to your amp key circuit. It turns off the
>> power and grounds the antenna on transmit. It works fine with the K3 QSK
>> at 30 wpm (haven't really tried it faster). The relay is a little noisy,
>> but I wear phones and it doesn't bother me. I am using it about 6m from
>> my vertical transmitting antenna with up to 1200 watts, so it is a good
>> idea to use this feature.
>>
>> On 1 Feb 2015 06:52, James Bennett wrote:
>>> Hi all,
>>>
>>> Have a K3/P3/KPA500/KAT500 and have been working 160 meters more the
>>> past year or so than in the previous 49 years. Only need three more
>>> states for WAS. Got a lot of noise here at this QTH, and have limited
>>> antenna space. Using an Inverted L up about 40 feet with a K2AV FCP
>>> under it.
>>>
>>> I'm looking at perhaps getting a magnetic loop receiving antenna, and
>>> have looked at the Wellbrook ALA 1530 and the Pixel RF Pro 1B.
>>>
>>> But my question is on the T/R switching of the K3. As I operate 99%
>>> CW, I depend on QSK operation. If I connect either of those receive
>>> only antenna to the RX Ant, does the K3 switch between Ant1 and the
>>> RX Ant fast enough to protect the K3?
>>>
>>> Thanks, Jim
>>>
>>> Jim Bennett / W6JHB Folsom, CA

-- 
73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/