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[aprssig] Kenwood D7 data cables

Dave Baxter dave at emv.co.uk
Fri Feb 10 09:45:10 UTC 2006


I can confirm, that 2 or 3 well placed (move about for best results)
ferrite "worry beads" help the PC noise problem one heck of a lot!  It
does depend on the PC too of course.  Galvanic isolation is the best
cure, or as others have found, use an external antenna.

Much has been said about all this in the past on the TH-D7 lists.

Dave G0WBX.
 

> -----Original Message-----
> From: David Huff [mailto:davidh at cf.distek.com] 
> Sent: Thursday, February 09, 2006 3:17 PM
> To: TAPR APRS Mailing List
> Subject: RE: [aprssig] Kenwood D7 data cables
> 
> That is why many people like the "Make your own" cables. You 
> can add torroids, filtering, or optocoupling to a cable a lot 
> easier when the cable is not done. I have found that those 
> snap on torroids can dramatically cut the noise on signaling 
> cables without much effort.
> 
> David
> kc0gfo
> 
> 
>   In my experience the signal gets noisier when a computer is 
> connected 
> to the D7 and when finding this web page, 
> http://www.homepages.hetnet.nl/~pe1dnn/#TH-D7E_Noise,
> I got it explained. I havn't tried any of the solutions, 
> since, for me, 
> it seems easier to attach an external antenna than solder 
> those 2.5 mm 
> plugs...




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