vlf transmit antenna question
 

Hi all,

I have a wireless fence, which operates at 17 kilohertz. It is used to
create a wireless fence to keep our dog confined to area close to the
transmitter and works in conjunction with a shock collar (the receiver
is carried by the dog).

We haven't used it yet, but the literature suggests the range is
around 90 feet.

I found the transmitter schematic on the FCC website. The transmitter
is nothing more than generic audio amplifier chips fed with 17
kilohertz signals from what appears to be a PIC or ASIC device. The
antennas are large (8-9 inch) air wound coils that have MANY turns on
them.

I'd like to increase the range without spending much money-so I want
something quick and dirty::

If I disconnect one of the built in antennas, can I hook up the
transmitter to an external antenna consisting of many turns of wire
mounted in the basement (say a 5 or 10 foot diameter loop)?? Would
this give the transmitter more range, or would the range be the same
as the smaller loops that are built in?

Thanks,

A

Albert wrote:

Hi all,

I found the transmitter schematic on the FCC website.

If you could post the web site URL so we could look at the schematic, it
would help to answer the question. Also, what is the intended use?

Thanks

Bob

Of course, modifying it will void its Part 15 certification (and I
assume it is Part 15 approved) and open you up to the wrath of the FCC...

Scott



Albert wrote:
Hi all,

I have a wireless fence, which operates at 17 kilohertz. It is used to
create a wireless fence to keep our dog confined to area close to the
transmitter and works in conjunction with a shock collar (the receiver
is carried by the dog).

We haven't used it yet, but the literature suggests the range is
around 90 feet.

I found the transmitter schematic on the FCC website. The transmitter
is nothing more than generic audio amplifier chips fed with 17
kilohertz signals from what appears to be a PIC or ASIC device. The
antennas are large (8-9 inch) air wound coils that have MANY turns on
them.

I'd like to increase the range without spending much money-so I want
something quick and dirty::

If I disconnect one of the built in antennas, can I hook up the
transmitter to an external antenna consisting of many turns of wire
mounted in the basement (say a 5 or 10 foot diameter loop)?? Would
this give the transmitter more range, or would the range be the same
as the smaller loops that are built in?

Thanks,

A