Products

Development of the G4TPH Mag-loop

I bought a holiday apartment in Spain. Wishing to operate from my balcony I bought a FT 817 and a Miracle Whip. Unfortunately the Miracle Whip proved to be not all that successful.

I decided there must be a better portable antenna solution and started trying various alternatives.
After several prototypes I developed the 2 models of Mag-loop, the ML-40 and the ML-20.

My travel kit with antenna

Travel kit opened

The G4TPH ML-40 Mag-Loop

This model covers the 40meter, 30meter and 20meter Amateur bands.

This antenna consists of 12 lengths of aluminium rails used to form a symmetrical circle or “loop” with a special Tuning Unit mounted on the top and a loading Unit positioned at the bottom of the “loop”.

The G4TPH ML-20 Mag-Loop

This model covers the 20meter through 10meter Amateur bands.

This model is virtually the same except only 8 aluminium rails are used instead of 12.

The Tuning Unit and the Loading Unit are different for each model. It is not possible to use only 8 rails with the ML-40 Tuning and Load units.

Although I don’t market the ML-40 as an 80m antenna, it will load up on 80m and I have started working the Local NADARS Sunday morning net using 5 watts and my ML-40 Mag-loop. On one net I was able to receive a station 57 about 30 miles away better than one of the local members using a proper outdoor 80m dipole. Obviously I suggested he should buy a ML-40 Mag-loop.

The Loading Unit