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

[Laurence KL1 X]

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


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