[Ham-Mac] CI-V interface noise

[EZ Rhino]

Don, it sounds like soft hiss/static....just like normal background radio
noise.

Chris





----- Original Message -----
From: "Don Agro" <dagro at dogparksoftware.com>
To: "Mac enthusiasts involved in amateur radio applications"
<ham-mac at mailman.qth.net>
Sent: Monday, April 16, 2007 3:10 AM
Subject: Re: [Ham-Mac] CI-V interface noise


> Hi Chris,
>
> On 15-Apr-07, at 9:44 PM, EZ Rhino wrote:
>
> > Chris and Don, thanks for the quick replies.  First, I didn't mean
> > to imply that there is something wrong with either of your products;
>
> Understood.
>
> > the fact that the noise recurs with two different interfaces is
> > probably a good sign that there is nothing wrong with the interface
> > itself.
> >
> > IT hadn't occurred to me that it could be radiated through the
> > antenna.  For fun, I disconnected the coax from the radio and tried
> > to duplicate the noise in the normal manner.  No noise.
>
> Great !
>
> >   I reconnected the coax and wound it into a choke balun outside,
> > just before it comes into the house (my wire antenna is fed with
> > ladder line to ground level.)  It seems to help some (in
> > conjunction with the two toroids on the USB cable.)
> >
> > Without changing out the power supply, I can't say whether or not
> > that would help.  I guess I can check on cost and see if it is
> > worth trying.
>
> No, I thought if you had someone around your area with a Mac laptop
> or something you could do a quick check, but I think you've found the
> source, or at least the way it's getting into the shack.
>
> Does it sound like power line noise ?
>
> > Thanks!
> >
> > Chris
>
> 73 Don Agro VE3VRW
>
> D o g   P a r k   S o f t w a r e   L t d .
>
> email: dagro at dogparksoftware.com
>    www: http://www.dogparksoftware.com
>      iChat AV:dogpark at mac.com
>
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