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Re: [RFI] DigiKeyer II

To: Peter Laws <plaws@plaws.net>
Subject: Re: [RFI] DigiKeyer II
From: "Dale J." <dj2001x@comcast.net>
Date: Thu, 2 Jan 2014 16:33:41 -0600
List-post: <rfi@contesting.com">mailto:rfi@contesting.com>
Peter, if you have the rig blaster still, can you re-connect that back the way 
you had it?

And see if you have the RF with it back in place, just something to try.  The 
ruffling up of wiring and such can bring in the RFI as I have experienced a 
couple of times.  Connections, wiring routes and metal shields touching other 
unrelated metals around the shack, and so on.  

Hope you find the stinker before you loose all your hair, hi…

I can tell, you are working hard at it.  When I've had RFI problems here, it 
becomes an obsession.  I don't sleep or eat till I get it solved.

Dale, k9vuj

On 02, Jan 2014, at 16:11, Peter Laws <plaws@plaws.net> wrote:

> On Thu, Jan 2, 2014 at 3:31 PM, Dale J. <dj2001x@comcast.net> wrote:
>> Hi Peter, de Dale, K9VUJ
>> If you got a computer connected the most likely place at least that I've 
>> found is the keyboard cable and mouse cable picking up RF and distributing 
>> it all over connected devices.  I myself have my mouse and keyboard cables 
>> wrapped in #31 mix snap-in's.  Be sure the snap-on is making good contact at 
>> it's mating surfaces.  Wrap tightly with tape if the snaps do not seem to 
>> close it properly.
> To review: same setup with a Rig Blaster Plus in place of the DK-II,
> including a connection to ACC1 on the IC746Pro never had this issue;
> If I disconnect the DIN connector at ACC1, the problem vanishes - this
> is not true if I disconnect the Key or CI-V lines (all of which come
> from a DB15 on the unit, as you surely know).
>> The two mating surfaces have to come together completely, otherwise it's as 
>> if it were't even there.  The best of course is a solid ring, but with 
>> keyboard and mouse cables it's not alway easy to get the USB connectors 
>> though the ring several times unless you buy a big one, a little more $.
> I bought a bunch of #31 and #43 Fair-rite 2.5" toroids and yes, they
> are "expensive" but not compared to the DK-II!  Four turns of the
> interface cable through a #31 toroid changed nothing.
> And yes about the snap-ons!  A few years ago, while fixing a different
> RFI issue, I heard no change in the noise as I put the choke over the
> wire until the two halves mated - boom! gone.  I touched/untouched
> several time just to convince myself I wasn't imagining things, so
> yeah, ferrite works and it has to be all the way around the cable!
>> I've had zero RFI problems with my digikeyer.  They are pretty RFI proof, so 
>> I don't understand why you are having such a time with it.  That is the 
>> nature of RFI I guess, it's all black magic…hi, not really, but frustrating 
>> at times.
> On that we can all agree:  it's magic.  :-D
> -- 
> Peter Laws | N5UWY | plaws plaws net | Travel by Train!
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