[Elecraft] RFI

[John Gaynard]

I am noticing keying errors on the k3 ERR PLL and it usually goes away when
I shutdown the MKII interface.  I have ferrites on every cable going into
the K3 but did not know about the MH MKII USB issue.  I am noticing it when
I use WinKey from my ACLog logger.  I am running a KW into a SteppIR BiggIR
vertical with an almost 1:1 SWR.

Thanks

John K8WDN

-----Original Message-----
From: Stewart [mailto:stewart at baker.nildram.co.uk] 
Sent: Sunday, November 08, 2009 4:24 AM
To: John Gaynard; elecraft at mailman.qth.net
Subject: Re: [Elecraft] RFI

John,
What do you mean by RFI is shutting down your K3 ?
Please give some more details.

There is a known issue with the MH MKII where it has poor immunity on 
the USB interface in the presence of a strong RF field.
A mod  of fitting a single capacitor  is available to provide the solution.

73
Stewart G3RXQ
On Sat, 7 Nov 2009 20:58:54 -0500, John Gaynard wrote:
> I am getting destroyed by RFI on the back panel.  I am using a MicroHam
> MKII interface.  I have ferrites on every cable from the MKII and it is
> still shutting down the K3.  I know the real solution is the RFI mod for
the
> K3.  Is there an interim solution?  How long would it take if I shipped
the
> K3 back to have all the current mods applied?  Guillain-Barre Syndrome
> pretty much destroyed my sense of touch so intricate mods are beyond my
> attempt.  This RFI is killing my SS attempt tonight.
>
>
> John K8WDN
>
>
> K3 #157
>
>
> John
>
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html