Metal detector coils testing self resonance on nugget finder coils.

[@alanhughes1262]

interesting woody i build antenna s for amateur radio from less than 100 khz to 30mhz i bought a cheap little dongle called a nano vna which has a little screen gives you the resonant frequency at any wire length for inductors and capacitors and for lc circuits i use to use maths capacitive and inductive reactance were the two meet to work out the resonant frequency and dip meters , but the little nano vna dongle is a life saver .has a lcd screen shows the dip and resonant frequency capacitance and inductive reactance all on a little lcd screen cost around 70 dollars .can even read impedance of wire lengths and feed lines .it sends a little voltage to energise the field.

[@DetectorMods]

I have a HF antenna analyser somewhere, must of built it 25 years ago.

[@alanhughes1262]

@@DetectorMods i will make up a connector for the vna and try it out on coils .the ballarat hamfest is on the 5 feb 2023 at the balerate airport all types of electronic gear there worth a look.lots of hams are into detecting.

[@DetectorMods]

@@alanhughes1262 That is a good idea, it might lead to a coil testing device.

[@mhdmhd8183]

thank you

[@stoop-tech1060]

Do you know felezjoo pi. Metal detector !!?

[@DetectorMods]

Never heard of it.