QSK

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QSK

Rajiv Dewan, N2RD
Did an A/B comparison of QSK between the K2 and my Yaesu 1KMP that I  
have owned for many years.  To give Yaesu all the advantage I could,  
I set the delays to zero, no linear, set the linear switch to off (it  
affects the timing), and turned on the DSP.  The received audio on  
the Yaesu was horrible compared to the K2.  While the K2 was smooth,  
almost as if I did not have breakin turned on, the Yaesu audio was  
full of low frequency thumps and distortion so much so that it made  
it hard to copy well between morse elements.  I was transmitting at  
around 35wpm.   I was using cascaded 500Hz filters on the Yaesu and  
the K2 filter was at the 400Hz setting.  I also have the INRAD  
roofing filter installed on the Yaesu.

Yaesu: fully loaded with all crystal filers and the roofing filter
K2: Stock with KDSP2

But, I guess that the people on this list already know this!

I bought the K2 to use primarily as an IF rig for VHF and up.  I was  
planning to use the Yaesu for all HF contesting.  I am now changing  
my mind.  I just ordered the KPA100/KAT100 combo.  I mostly do LP, CW  
contesting.  The K2 seems ideal.

Raj, N2RD
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RE: QSK

N2TK
Raj,
You were able to copy between the elements with the K2 at 35WPM? If so, I
wonder what is different about your K2? Serial number?
I have felt that the QSK was the one weak point of the K2. I can't hear
between elements above about 16wpm. Yet when I played with Yaesu's 1K series
I was able to hear between elements.
N2TK, Tony
#3481

-----Original Message-----
From: [hidden email]
[mailto:[hidden email]]On Behalf Of Rajiv Dewan, N2RD
Sent: Wednesday, July 19, 2006 8:50 PM
To: elecraft
Subject: [Elecraft] QSK

Did an A/B comparison of QSK between the K2 and my Yaesu 1KMP that I
have owned for many years.  To give Yaesu all the advantage I could,
I set the delays to zero, no linear, set the linear switch to off (it
affects the timing), and turned on the DSP.  The received audio on
the Yaesu was horrible compared to the K2.  While the K2 was smooth,
almost as if I did not have breakin turned on, the Yaesu audio was
full of low frequency thumps and distortion so much so that it made
it hard to copy well between morse elements.  I was transmitting at
around 35wpm.   I was using cascaded 500Hz filters on the Yaesu and
the K2 filter was at the 400Hz setting.  I also have the INRAD
roofing filter installed on the Yaesu.

Yaesu: fully loaded with all crystal filers and the roofing filter
K2: Stock with KDSP2

But, I guess that the people on this list already know this!

I bought the K2 to use primarily as an IF rig for VHF and up.  I was
planning to use the Yaesu for all HF contesting.  I am now changing
my mind.  I just ordered the KPA100/KAT100 combo.  I mostly do LP, CW
contesting.  The K2 seems ideal.

Raj, N2RD
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Re: QSK

Vic K2VCO
N2TK, Tony wrote:

> You were able to copy between the elements with the K2 at 35WPM? If so, I
> wonder what is different about your K2? Serial number?
> I have felt that the QSK was the one weak point of the K2. I can't hear
> between elements above about 16wpm. Yet when I played with Yaesu's 1K series
> I was able to hear between elements.

My suspicion is that he didn't really mean 'elements', but rather
letters.  No K2 of any serial number can hear between elements
(dits/dahs) at 35 wpm.

The K2's QSK is much smoother and quieter than most other radios.  It
is, however, not particularly fast.  I've made a mod to speed it up (see
<http://www.qslnet.de/member/la3za/K2/modAny.html>, look for "Faster QSK
Performance" ) but the best it can do is around 22 wpm.  Your mileage
may vary, but not up to 35 wpm!
--
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco
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