On Mon, 28 Mar 2005 11:44:33 -0800, Richard Clark
wrote:
l.

Hi Richard and Alex,

Both of you thought the wireless fence involved a buried loop, which
is NOT the case.

The transmitter is NOT connected to a buried loop, the antenna is in
fact contained within the plastic case of the housing. The antennas
are 8 or 9 inch air would coils with MANY MANY turns of small gauge
wire.

My question is.....

If I disconnect the internal coils, can I replace them with much
larger coils of similar inductance that would probably be in the
basement (out of the way)??

Thanks,

A


The problem I had was presuming that the antenna was at the perimeter,
and if your dog penetrated towards it, entering its field, that this
would "modify" her behavior. I

Putting a ferrite core in the windings of the antenna would extend its
range, wouldn't it ?
- or are you working on a way to shock the neighbor's puppy ?
:-)

On 2005-03-28, Albert wrote:
On Mon, 28 Mar 2005 11:44:33 -0800, Richard Clark
wrote:
l.

Hi Richard and Alex,

Both of you thought the wireless fence involved a buried loop, which
is NOT the case.

The transmitter is NOT connected to a buried loop, the antenna is in
fact contained within the plastic case of the housing. The antennas
are 8 or 9 inch air would coils with MANY MANY turns of small gauge
wire.

OK, then this is very different from other "invisible" fences that I have
seen. It would appear that this device is designed to keep the dog close to
the transmitter, and then shock her when she strayed too far - when the
receiver on the collar lost the input signal.

I think that device would not give you all that much control as to what kind
of coverage area you can have. Also what would happen if the collar lost
the xmitter signal due to other reasons (dog goes behind a trash can/metal
shed/other large metal object)? Personally, I would return it, and get the
type that used a buried wire -- or just train the dog not to stray too close
to the road by other means.

That being said, it might still be easier to increase the sensitivity of the
receiver. What type of antenna is on the dogs collar? Also - what is the
brand and model of this unit? It might make tracking down the soultion a bit
easier.

--
Alex / AB2RC
Linux is user friendly, however it is not idiot friendly

Modification of the receiver is not an option for several
reasons.........

-

The Earth and solar system make alot of noise on these frequencies. I
suspect the receiver is designed to be somewhat insensitive in order
to avoid problems with noises generated by Mother Nature.

-

The schamatic of the dog collar is not available, the manufacturer
chose to make type acceptance documents 'private'. There is a record
of the receiver, but all details are unavailable to the public.

-

The receiver assembly is in an enclosure that can't be opened,
probably to insure operation if the collar gets dunked in water (some
dogs enjoy swimming). It also appears to be potted, the black epoxy is
visible in the port provided for adjusting the correction level).


-

A



That being said, it might still be easier to increase the sensitivity of the
receiver. What type of antenna is on the dogs collar? Also - what is the
brand and model of this unit? It might make tracking down the soultion a bit
easier.

I Hope I misunderstood or you have thought about it:

If the collar shocks the dogs when it stops receiving the transmitter's
signal... What is going to happen to the dog when the transmitter
eventually stops working (exhausted batteries, mains cut or simple
malfunction)?

Toni

On Tue, 29 Mar 2005 13:02:28 GMT, AB2RC
wrote:

Also what would happen if the collar lost
the xmitter signal due to other reasons (dog goes behind a trash can/metal
shed/other large metal object)?

Hi Alex,

At 17KHz this is virtually impossible. It would be like trying to
hide behind a house in Aceh when the wave came in.

73's
Richard Clark, KB7QHC

On 2005-03-29, Richard Clark wrote:
On Tue, 29 Mar 2005 13:02:28 GMT, AB2RC
wrote:

Also what would happen if the collar lost
the xmitter signal due to other reasons (dog goes behind a trash can/metal
shed/other large metal object)?

Hi Alex,

At 17KHz this is virtually impossible. It would be like trying to
hide behind a house in Aceh when the wave came in.

Forgot about the frequency there for a minute ... 17khz is a very long wave

Either way, the whole concept of this specific device seems sort of
backwards for it's intended purpose.

--
Alex / AB2RC
Linux is user friendly, however it is not idiot friendly