Magnetic Loop for 40m band
That’s me during the calibration.
Measures are: 2m the base and 1m the eight; 25cm the diameter
The feeder is just a triangle. The tuning capacitor is home made and semi-variable: a Plexiglas slab can be moved into and out to tune to 7.060 MHz on ZP net.
The four elbows have been soldered by a professional.
The material is aluminium as I couldn’t find copper pipe here in ZP.
Here it is sitting on the pick-up.
The efficiency is near to a full size dipole (around 70%) working much better than the Hustler I used before, which has an efficiency around 5% .
I suppose that the majorities of losses come from elbows. Of course would have been better made it by copper.
If you can effort do not hesitate….made it by silver !!