TW-5 schmatics needed

[refamat]

Hi Folks

I need schematics and repair manual for a Fishrs TW-5 and a TW-5 witch.

I want to convert one for use to find large or very dense ferrous items

[Dave J.]

The TW-5 was taken out of production 25 years ago. Many of the parts used to manufacture it are no longer available. I don't think that even the factory services them any more. And, the design does not lend itself to being converted to something else.

For finding iron objects, a differential (gradiometer) magnetometer is usually more effective than a 2-box unit. What 2-box units do best is to locate electrically conductive utilities such as pipes and cables, whether ferrous or nonferrous.

--Dave J.