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 !!