After some good success with the QRP-Guys vertical tri-band (20/30/40 m) antenna, I decided to give the 80/60m vertical antenna a try. I do not have much space and wanted to be able to use 80 meters. In short, it is a coil-loaded vertical with taps to select 80m, 75m and 60m bands. I built the antenna according to the instructions and found it had a high SWR on 80 meters. It could probably be tuned to a 1:1 SWR by taking some turns out of the coil, but that may sacrifice performance on 75m and 60m. I decided to leave the antenna as is, since my Elecraft K2's internal tuner can match the impedence without any difficulty. You do need to use the taps for 75m. The first time I tried the antenna on 75 meters, I forgot the set the tap and my tuner couldn't find a match.
I am in central CA and had no problem making several CW QSOs into Arizona and Washington with good signal reports at QRP power. I could hear and see my signal clearly on the KFS WebSDR, located about 100 miles away. I didn't try SSB with the antenna yet, band conditions were bad and there was nobody I cared to talk to. (Lots of politics and ranting about former spouses, etc...)
Although not a product review, I think this is a good antenna for 80m regional communications. It's only $20, is extremely portable, has a very small foot print, and is very easy to set up. I look forward to trying this antenna in more situations and am curious if more radials will increase its performance.
I am curious to hear from others who have this antenna and their experiences. Especially if anyone gets this antenna to work on 80 meters without a tuner.
Very interesting, thank you! I might give it a try...