Total posts : 45366
I had that antenna connected to a Metzo transmitter. I don’t know what the feedpoint impedance is but it worked “OK”, a relative term.
A base loaded antenna would afford you a way to adjust the feedpoint by tapping up the coil to match the transmitter impedance. Likewise, tuning the antenna for resonance you can adjust the tap on the coil for the antenna rod connection.
I really like the Talking House ATU antenna as tuning is very simple. Problem is you don’t see them on Ebay very often. From the manufacturer they are expensive.
I suppose the antenna you are looking at could be used as a tuner attached to a rod antenna instead of the wire. I’d be curious to see what’s in the box. Probably a slug tuned coil. I have some old broadcast oscillator slug tuned coils around here somewhere. Maybe I’ll try that, reinventing the Talking House ATU.