RE: Pops and clicks on send

[Stephen W. Kercel]

Don:

See comments

*************
between asterisks
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Heartfelt thanks for your very valuable help.

73,

Steve

At 07:43 AM 12/3/2006, you wrote:
>Steve,
>
>Until you get acquainted with it, any menu seems cryptic, the K2 is no
>exception.  I will let you play with my mini VHF/UHF handheld if you want a
>cryptic menu to deal with (and documentation in broken English to boot).  I
>have had it for 6 years and still have not figured it out!  About all I do
>with it is listen to a few repeaters since I have not been able to set it up
><G>.

***********
I know what you mean. I been using a Japanese VCR for over 20 years.
It still runs fine, but I still have to painfully follow its very
cryptic manual to program it to do anything.

It only took me about 10 minutes to get a handle on the K2 menu.
***********


>On the K2, the 8R signal is the control for muting and turning things on and
>off when switching from transmit to receive.  If the t-r delay is set to
>0.00, then 8r hold or 8r normal should operate just about the same.  If 8R
>is set to hold, then the receiver should remain muted for the time set into
>the T-R value.  The range on t-r is from 0.00 to 2.55 seconds.  Try a t-r
>setting of 0.10 along with 8R hold and see if the clicks remain.

************
T-R = 0.05 and 8r hold eliminates virtually all clicks in my particular rig.
************



>Also listen closely to try to determine whether the clicks are on the start
>of keying or when the key is released.

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Mostly on release
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>With the KDSP2 installed, there is a muting circuit on the KDSP2 as well as
>the normal muting on the K2 Control Board, and I have not really figured out
>why there is an occasional K2 that suffers from these clicks - I just know
>that some K2s have them (these are only audio clicks, they are not
>transmitted.

****************
No transmitted clicks is the thing that really matters.
****************


>What I have figured out is that the KPA100  T/R switch somehow is involved
>in these audio clicks, and it does revolve around the relative timing of the
>individual circuits.  I have not yet had an occasion to add the letest
>KPA100 upgrade to a K2 which has this click condition, but I have a
>suspicion that it would help since the KPA100 T/R switch operation was
>changed with the KPA100UPKT - this is a hardware only change, the software
>is not involved.



******************
I find no mention of this on the Elecraft site. Is it new? Can the
replacement hardware be purchased from Elecraft? BTW, my rig is
fairly recent. It was constructed in March 2006. Does it already
include the hardware upgrade?
******************

>73,
>Don W3FPR
>
> > -----Original Message-----
> > From: Stephen W. Kercel [mailto:[hidden email]]
> > Sent: Saturday, December 02, 2006 9:57 PM
> > To: [hidden email]
> > Subject: RE:Pops and clicks on send
> >
> >
> > Don:
> >
> > T

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