Loop Antenna Crystal Radio - UK Vintage Radio Repair and Restoration Discussion Forum

vu2nan-nandu · 25th Nov 2015, 2:00 pm

A loop antenna crystal radio is of interest, on account of its portability, though it is no match for a crystal radio using an external vertical wire antenna and earth.

If it's performance could be considerably improved with increased loop size, then its portability would be the first casualty.

As usual 2 configurations are possible - parallel-tuned-series-fed and series-tuned-shunt-fed.

The loop antenna was rigged up using a 4-legged stool as a makeshift frame. The stool was laid on its side on the table, making it convenient to wind the loop on its legs.

Both the versions were tested with the plane of the loop oriented towards the local 612 kHz, 200 kW AM broadcast station.

Performance was identical though a far cry from that of another crystal radio using a vertical wire antenna and earth.

Regards,

Nandu.

http://nandusthoughts.blogspot.in/20...tal-radio.html

25th Nov 2015, 2:00 pm	#1
vu2nan-nandu Pentode Join Date: Jul 2014 Location: Bangalore, India Posts: 132	Loop Antenna Crystal Radio A loop antenna crystal radio is of interest, on account of its portability, though it is no match for a crystal radio using an external vertical wire antenna and earth. If it's performance could be considerably improved with increased loop size, then its portability would be the first casualty. As usual 2 configurations are possible - parallel-tuned-series-fed and series-tuned-shunt-fed. The loop antenna was rigged up using a 4-legged stool as a makeshift frame. The stool was laid on its side on the table, making it convenient to wind the loop on its legs. Both the versions were tested with the plane of the loop oriented towards the local 612 kHz, 200 kW AM broadcast station. Performance was identical though a far cry from that of another crystal radio using a vertical wire antenna and earth. Regards, Nandu. http://nandusthoughts.blogspot.in/20...tal-radio.html Attached Thumbnails