Having just had to make an active antenna for HF (for gainful employment-type work, not Am. radio purposes. The commercially made one we've ordered is on five weeks delivery and it was needed before
Andy, I don't think the helical shape of the element will have any significant impact on performance unless the frequency is approaching half wave resonance of the helix itself (by half-wave resonanc
As the thing had to be resonably lightweight, I made the antenna element from copper tape on 15mm plastic water pipe rather than use a solid copper tube. Just for a bit of novelty I wound the tape in
Hi Peter et group. Sounds an interesting antenna, but for full band Rx coverage I can't see what a folded resistively loaded dipole has to offer over the conventional short whip into a high impedance
Hello Andy, There is a commercial design that uses a helical wound whip element. The main purpose is to decrease the length of the whip, so you have the same performance with a smaller overall length
Hi Andy, The simplest broadband antenna might be the T2FD (Terminated Tilted Folded Dipole) designed by W3HH. This antenna is essentially a folded dipole with a terminating resistor in the opposite c
Andy Talbot wrote: Hi Peter et group. Sounds an interesting antenna, but for full band Rx coverage I can't see what a folded resistively loaded dipole has to offer over the conventional short whip in
