LIScanner101
Completely Banned for the Greater Good
I see that most of the venerable multi-band scanner antennas like the vintage A/S MON-Series and the contemporary Austin Spectra all have loading coils. The Spectra has two, the old MONs only had one big one.
How are these coils characterized? I understand that you can lengthen/shorten the metal rods to change the VHF low band and/or high band performance, but doesn't the coil have an impact on that? Is there a set of formulae that one can use to wind these coils to get the proper resonance/reactance/whatever? I'm not an antenna guy but I'm very interested in the theory both theoretical as well as practical.
How are these coils characterized? I understand that you can lengthen/shorten the metal rods to change the VHF low band and/or high band performance, but doesn't the coil have an impact on that? Is there a set of formulae that one can use to wind these coils to get the proper resonance/reactance/whatever? I'm not an antenna guy but I'm very interested in the theory both theoretical as well as practical.