Really Rugged Coil for 17 Meters
My ongoing quest is to design and build highly efficient HF mobile antenna coils continues, with the test results proving once again that coils with a larger diameter (there is a limit) and shorter in length have higher Q than long small diameter coils.
This 17 meter coil 3" in diameter, is proving to be a very efficient coil with a high Q.
Just so you know, I build my RRC coil forms from Delrin®, and both black as well as white Delrin® are RF transparent, although the white is more RF transparent than the black Delrin® above 1 GHz in frequency.
Click on the photo for a closer look.....