I found some discussion at the following link.  One of the posts by MZap
towards the end gives more complete information.  See:

<http://curezone.com/forums/am.asp?i=1473364>

The $60 zapper on ebay looked like a pretty good unit at a fairly
reasonable price.  It would be nice to see the output waveform, but I don't
see why it would be inadequate after all the work they put into building
the unit.  The basic design is not complicated.

Dan

On Mon, Dec 24, 2012 at 10:21 PM, Dan Nave <bhangcha...@gmail.com> wrote:

> I've only ever used 30KHz zappers.  There must be some rationale for the
> other frequencies though.
>
> Dan
>
>
> On Mon, Dec 24, 2012 at 4:20 PM, PT Ferrance <ptf2...@bellsouth.net>wrote:
>
>> I just got a 3 frequency zapper (15Hz, 2.5KHz and 30KHz) and there is no
>> printed material that came with it on choosing the best frequency.  All my
>> books are in storage.  Can someone help me out?  I zap 7 minutes and rest
>> 20 minutes for 3 cycles, I've read but I don't know if I do each cycle with
>> the same frequency or if I go from one frequency to the next.  Does anyone
>> know how to proceed?
>> Thanks.
>> Merry Christmas.
>> PT
>>
>
>