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

[Laurence KL1 X]

Yep buried insulated wire loop around perimeter running a "coded" match freq to dog collar receiver. Get too close and audible alarm sounds on collar - get closer then "whack" - dog get a zap




On Apr 4, 2013, at 6:13 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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