Show Posts
106
Equipment / Re: HF Receiving Antenna Myths
« on: June 05, 2014, 1735 UTC »
There's nothing better than a properly tuned, resonant antenna, for the desired band of operation.
That said, one of the manual tuners from MFJ or similar can be used to get a proper match. i.e. Rotate the L and C knobs for maximum noise on the receiver.
At Field Day, we run home made monoband beam antennas out of aluminum fed directly to the TXR's. Trying to use the 20M beam on ANY other band is like beating a dead horse, the SWR will be out to lunch and the band will appear to be dead except for the few signals way in excess of S-9.
As far as end fed wires go, there are numerous sites on the web for suggested lengths. Here's a pdf file to look over and see which length you can accommodate:
http://www.balundesigns.com/Wire%20Lengths%20for%209-1%20ununs.pdf
I'm using on of his unon's (9:1) on my SDR-iq remote servers. I get emails occasionally from users complementing me on the setup.
73 de Kriss KA1GJU
That said, one of the manual tuners from MFJ or similar can be used to get a proper match. i.e. Rotate the L and C knobs for maximum noise on the receiver.
At Field Day, we run home made monoband beam antennas out of aluminum fed directly to the TXR's. Trying to use the 20M beam on ANY other band is like beating a dead horse, the SWR will be out to lunch and the band will appear to be dead except for the few signals way in excess of S-9.
As far as end fed wires go, there are numerous sites on the web for suggested lengths. Here's a pdf file to look over and see which length you can accommodate:
http://www.balundesigns.com/Wire%20Lengths%20for%209-1%20ununs.pdf
I'm using on of his unon's (9:1) on my SDR-iq remote servers. I get emails occasionally from users complementing me on the setup.
73 de Kriss KA1GJU
