[Lowfer] FW: Invisible dog fence LF and MF interference is 0.5oz of C4 the answer?

[John Hamer]

Fence
On Apr 4, 2013 10:13 PM, "Zack Widup" <w9sz.zack at gmail.com> wrote:

> Is this one of those systems where there is a wire with an LF signal
> placed on it, and the dog wears a collar? If the dog crosses the wire,
> the collar gives the dog an electric shock?
>
> I never cared for those systems. I always thought there must be a
> better way of controlling your dog than giving it an electric shock.
>
> 73, Zack W9SZ
>
>
> On 4/4/13, Laurence KL1 X <hellozerohellozero at hotmail.com> wrote:
> >
> >
> >
> >
> > Well interesting news from Innotek that the transmitter is set on
> 8.192kHz
> > AM pulsing and thus what Im seeing is modulated  square wave ish
> harmonics
> > in the LF MF and SW bands, it seems to me the easiest solution now would
> be
> > to shove in an RF choke on each side of the loop where it comes out of
> the
> > unit enough Z to stop my interference  at my rx freqs but negliable to
> VLF.
> > Im not sure how its driven so may need only 1 -  Im thinking 500uH on a
> 77
> > core (may be a lilttle high)...opening gambit. Ive gone back to Innotek
> and
> > asked what theyve deployed before to clear up this interference as I bet
> Im
> > not the first. Im suprised again that Ive not heard more about this type
> of
> > QRM from this community over the years -
> >
> > Laurence KL 1 X
> >
> >
> >
> > From: hellozerohellozero at hotmail.com
> > To: fccpart15 at earthlink.net
> > Subject: RE: [Lowfer] Invisible dog fence LF and MF interference is
> 0.5oz of
> > C4 the answer?
> > Date: Wed, 3 Apr 2013 16:08:56 -0800
> >
> >
> >
> >
> > Lee - thanks - the unit that is causing this racket is an Innotek "Dog
> > Smart" unit about 7 years old - AC walwart with AA battery back up
> >
> >
> >
> >
> > http://kl7uk.com/smartdog.jpghttp://kl7uk.com/underloop.jpg
> >
> >
> > Im
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