|Click here for user manual|
|Gain 4.8dBi at tuned frequency|
|Bandwidth +/-2 MHz for SWR of 1.5|
|SWR 1.1 Max at tuned frequency|
|Max Power 2000 Watts|
|Construction Aluminium and Teflon|
|Connector UHF/SO-239 or N-Type|
|Input Z 50 ohm unbalanced|
We have customers that purchased our 5/8 antenna in the early days, later switched and spent much more money on other antennas hoping to get better performance, but were sadly disappointed by inflated gain figures to the horizon and they returned to our 5/8 antenna to restore their performance. Other customers have had frequent problems with Comet CFM-95SL tuning resulting in poor SWR and poor performance.
The antenna is constructed from aluminum with Teflon very low loss insulators. Coaxial line losses can be considerable at 88-108MHz. For long runs use a good quality cable such as LMR400 or equivalent for connecting the antenna to the transmitter. Total length 2 metres.
Below is the radiation pattern for our 5/8 antenna showing a cross section of the signal between the antenna and the horizon at 0 and 180 degrees. Looking down from above at the 0 degree point the radiation pattern is perfectly circular.
We designed the 5/8 antenna in 1996 and since then we have sold more than 1000 of them worldwide. We can count the number of returns on less fingers than you have on one hand. This really is a high performance antenna in every form. Fantastic RF gain, physical strength and durability, high power handling, operation in any climate, and easy installation. We have customers that are still using this antenna after 15 years of little or no maintenance. It is precisely tuned to the operating frequency of your choice and provides your transmitter with a perfect match and a gain of around 4.8dB, increasing your effective radiated power by about 2.8 times.
With correct mounting the RF field strength directly below this antenna is much lower than a dipole. The truly unbalanced input prevents any RF currents traveling down the outer of the feeder cable. This combined with the low field strength below the antenna and tight bandwidth reduces the chance's of audio, TV and other interference considerably and maximises RF power to the horizon.