3 ms·
Honestly, just strip coax away the outer sheath to expose the inner conductor. Make a loop with the exposed inner conductor and solder back onto the sheath. Inc
by Dwolb 11y ago
Honestly, just strip coax away the outer sheath to expose the inner conductor. Make a loop with the exposed inner conductor and solder back onto the sheath. Increase the loop size or turns for lower frequencies.
- friendzis 11y agoStripped probe is electric. Looped probe is magnetic. Stripped/looped probe is mixed probe. If you use coax - leave the shielding, just make sure to leave a gap. Just look at this picture [1] from this quite good article [2]. Depending on the design/equipment, you might need balancing/symmetrization. Also directivity/sensitivity. While turn count will improve overall sensitivity, loop size will increase directivity. Keep in mind that both loop size and turn count affect probe filtering characteristics (it IS a filter), so I highly recommend experimenting with several designs. Have a look at my attempt at making magnetic probe from RG174 [3]. It is fat because of two layers of thermal shrink tube, which made it stiff enough for my experiments :) It is hard to tell from a picture, but it should be that this probe uses two wires exactly for this purpose: one acts as a central conductor, other as a shield. [1]: http://www.compliance-club.com/archive/old_archive/030718b.jpg http://www.compliance-club.com/archive/old_archive/030718b.j... [2]: http://www.compliance-club.com/archive/old_archive/030718.htm http://www.compliance-club.com/archive/old_archive/030718.ht... [3]: http://imgur.com/hiRUJl6 http://imgur.com/hiRUJl6