Re: Zapper Experts - Why 30khz ?

>- wouldn't it be skipped by the zapper when it is running at a base 30 khz ?

No and Yes. Due to the fast rising edge of a good strong square wave, there will be some ringing but not as much as it would be at the right frequency. This is some of where the strength of a zapper comes in.

>- What would be the higher end harmonic freq reached by most zappers when running at the 2.5khz base freq.

This depends largely on the output circuit and driver. A driver has a frequency limitation and so does the output circuit. A 2.5 kHz square wave will produce harmonics as high as a 30 kHz output, all other considerations being the same.

The real problem is with the strength of the harmonics. The higher the number of the harmonic, the lower the strength.

What it comes down to is: Is a weak frequency that is very close going to be more effective that a strong frequency that is not close?

>- some competitors zappers may only reach 500khz yet better zappers may reach 900khz

This is mostly due to the output components.

>- Is there a method to estimate the maximum harmonic available from a specific base frequency ?

In real life yes, but it requires equipment and knowledge.

>- Hulda says in her book the zapper somehow covers all frequency ranges,

Yes, and this is partly correct but as you suggest, there is a problem with gaps in some cases.

>- I must apologise for my lack of knowledge

Do not apologize. There was a time in life where I knew no more than you do now in regards to this issue and the technology involved. We can only learn through inquiring.

Many years ago, I worked for a company that had a huge sign on the walls: "If in doubt, ASK!" Tweet