The HamUniverse Curtain claims to be an all band 160-10 meter Sterba Curtain. Let's look at that antenna in a model that includes the feedline. This antenna is the exact dimension of the article and contains actual window line in the elements. Height is 47 feet to the highest element.
From eHam Towertalk:
| I am hardly a Guru - but I did make this exact
antenna from the same link several years. It sounded soooo good on the
web page. Alas like most antenna hyperbole on the internet it did
not meet my expectations. It was a real pain to construct and erect. I put the top wire at about 55 ft. I tested it. I tested it against my 75 mtr loop, 40 mtr vertical and 130' dipole fed with 600 ohm feedline. The sterba did not win any test. In fact it was even worse than the all band (hyperboled) Mystery Antenna that it replaced. And the Mystery antenna was pretty poor..... I took it down after 2 weeks, I think it is still in my junk box along with the Mystery Antenna, a good place for both. Do yourself a favor and put up a 130' doublet fed with 450 or 300 ohm feedline. It will perform much better than this Sterba.... |
28.5 MHz gain is 12.55 dBi, or 4 dBd.
24.9 MHz gain is 12.43 dBi, or 4 dBd.
21.1 MHz gain is 6.13 dBi, or -2 dBd. Weaker than a dipole by 2 db.
18.1 MHz gain is 6.71 dBi, or -1.5 dBd. Weaker than a dipole by about 1.5 dB
14.2 MHz gain is -1.62 dBi, or -9 dBd. Weaker than a dipole by 9 dB
10.15 MHz gain is 6.13 dBi, or -2 dBd. Weaker than a dipole by 2 db
7.15 MHz gain is 5.51 dBi, or -3 dBd. Weaker than a dipole by 3 dB
3.6 MHz gain is 1.8 dBi, or -6.5 dBd. Weaker than a dipole by 6.5 dB
1.8 MHz gain is -11.6 dBi, or -19 dBd. Weaker than a dipole by almost 20 dB
