Jaycar electric fence module

"Clifford Heath"

But is not effective for canines - aka man's best friend.

Any attempt to use it against felines would be doomed from the beginning.

They would resent it to the ABSOLUTE max.

....... Phil

Hi Cliford,

I built one of these kits some years ago to try and keep my dogs of the garden. It simply doesn't have enough kick to be effective. In the end, the dogs were using it as a toy. I finally relented and went to the local farm supply store and purchased a small electric fence module for about $150. The first time they got a kick off it they went to the other side of the yard and haven't been near the garden since. We haven't had it switched on for two years. If I put some of the white tape anywhere in the yard, they refuse to go near that either (even with their dinner in it). I wouldn't waste my time with the kit, I spent over $80 (including 2 car coils) for no result.

Hope this helps although it's probably not what you wanted to hear.

Cheers

Commercial designs all pulse on around a 1.2 sec cycle, which is supposedly a design rule (possibly from NZ which led the way in the early energiser designs). There are also rules covering maximum voltage and pulse energy. It's a fair bet this is why Jaycar no longer market the JL circuit as a fence enegiser (the circuit is the same). Nor is it very effective.

The commercial designs are all capacitor discharge and use either an inverter (DC models), or voltage doubler (mains models) to obtain a respectable primary voltage (2*240*1.414 for the doubler). The biggest problem with building one is to obtain a suitable HT transformer other than buying it as an energiser spare part. The energiser manufacturers are probably well of the fact and seem to price their transformers accordingly.

There are a number of commercial units that are ideal for what BIL has in mind (and he's also part of a large market). Personal experience suggests that Gallagher are the way to go, both in design and ease of repair should the need arise. Mini B11 is their smallest battery operated unit and there's probably a compatable mains unit. Inquire at a stock and station agent (Wesfarmers sell Gallagher where I am).

If you want to save a buck you can buy Gallagher modules as a spare part (usually for around half the price of an encased unit). The B11 module is a complete unit, most of the others aren't (they're usually minus the output transformer).

-- John H

Go and get an electric fence unit off the shelf from an agricultural supplier.