Hi Kim,

The best 'zappers' available (IMO) can be found here.
http://www.annexmfg.com/

These are very professional units, operating at about 13V and
incorporate the 'BioWave' technology which keeps the square wave square
when connected to the body. I am using this in my own zappers with the
owners permission

This site is owned by one of the list members who may make himself known
or not.

For those with a technical ability, the circuit posted by Bill Biagioli
is very good, if a bit difficult to implement.

If one wanted to improve the basic Clarke zapper, then using a 12V
supply is the way to go...13.5V if you can, may need to ensure the 555
timer is not the CMOS type.
I sent 15V through mine...boy was that a wake up call.

Ivan.




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