Anyone ever run across this quirk?

[Joseph Reed-2]

I have a K2 which has a strange quirk,  it has developed a "thump" when it switches from transmit to receive in cw when set for full QSK.  Very annoying, and when trying to DX at fast cw speeds, I can't tell what the DX op is sending.  However, if I change the T-R delay to .01 it doesn't appear.
 
This is a pretty stock K2 with KSB2, KNB2, KAF2, K60XV, KAT2 and K160RX.  Any ideas as to how I can get back to QSK?
 
Thanks,
Joe N9JR
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[Bill Coleman-2]

On May 7, 2006, at 12:42 PM, Joseph Reed wrote:

> I have a K2 which has a strange quirk,  it has developed a "thump"  
> when it switches from transmit to receive in cw when set for full  
> QSK.  Very annoying, and when trying to DX at fast cw speeds, I  
> can't tell what the DX op is sending.  However, if I change the T-R  
> delay to .01 it doesn't appear.

I hear more of a thump in QSK when I have headphones plugged in to  
the speaker jack. If I plug into the headphone jack, there's no  
thump. I think the caps across the headphone jack have something to  
do with that.

There is a mod to get faster QSK performance from your K2. It's on  
the Elecraft site, or look in LA3ZA's mod site.

Bill Coleman, AA4LR, PP-ASEL        Mail: [hidden email]
Quote: "Not within a thousand years will man ever fly!"
             -- Wilbur Wright, 1901

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