[Elecraft] K2 with Distorted Transmit Signal

[John Smith]

Bill,

I found that RFC15 was open on my K2 as well.  I've replaced it and it is a
little improved, but the signal still sounds like it's under water.  I
didn't find a miniature one, so I used the next size up - maybe this is an
issue?  There is still a pronounced warbling to it.  Seems worse on some
bands more than others.  Digging through the archives, I found someone that
removed the circuit entirely and rejumpered pin 16 to the cut trace that is
shown in the Erata sheet.  I tried the same, but this didn't do the trick
either.  Will keep looking through the archives etc..

Thanks again.

John



----- Original Message -----
From: "William M. Spaulding, Sr." <billspau@att.net>
To: "John Smith" <jlsmith5@qwest.net>; "Elecraft Mail list"
<elecraft@mailman.qth.net>
Sent: Friday, September 12, 2003 9:40 PM
Subject: Re: [Elecraft] K2 with Distorted Transmit Signal


> Hi, John,
>
> I just finished fixing a problem that sounds exactly like the one you
> describe by replacing RFC15.  It is the miniature inductor that is tacked
on
> the bottom of the board on U4 pin 16.  In my radio, the inductor was
> intermittent, and started out warbling.  The signal got more and more
raspy
> until I quit using the radio to fix the problem.  The inductor ended up
> open.
>
> If you can find a 100 uH choke, try replacing RFC15.
>
> Good luck,
>
> Bill
> NA7Y
>
>
> ----- Original Message -----
> From: "John Smith" <jlsmith5@qwest.net>
> To: "Elecraft Mail list" <elecraft@mailman.qth.net>
> Sent: Friday, September 12, 2003 9:18 PM
> Subject: [Elecraft] K2 with Distorted Transmit Signal
>
>
> Hello,
>
> I just completed #3706.  Went through alignment with no problems.  Good
> power on all bands etc.  Tonight during my first QSO, the op reported a
> distorted signal.  Using another receiver and listening to the signal, it
> sounds raspy or kind of has a warbing to it.  I noticed that it only make
> the noise though when I use the paddlet and keyer.  If I just press the
TUNE
> button, the signal sounds clean.  Any ideas out there?
>
> John
>
>
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