Loop antenna + controller
Please visit Loftur's site https://sites.google.com/site/lofturj/to-automatically-tune-a-magnetic-loop-antenna for more information.
Magnetic loop controller auto SWR, https://www.youtube.com/watch?v=AxbH4oBRvoc home made by PD0LEW.
Loop antenna 22mm Cu tube diameter 1.59 meter with relays for 20 and 40 meters.
SWR bridge (Kits and Parts) modified.
This assembly is mounted in a 110mm PVC pipe
Home made bending machine for Cu22mm pipe.
Ratio 5:1 Planetary Gearbox
Auto SWR test
Yahoo Groups Loop controller
First test of my 5:1 geared stepper motor and Jennings vacuum capacitor
Check my loop antenna for SWR