[Elecraft] RFI

[Joe Subich, W4TV]

That modification applies only to RF into the audio (MK II 
preamp) because of the layout in the first production run. 
It does not impact common mode RF in the shack which is 
what John's symptoms indicate. 

73, 

   ... Joe, W4TV 
 




> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net 
> [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Stewart
> 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
> >
> >
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