Hy-Gain SPT-500 10-12 m Vertical Base Antenna
This fantastic true full-size 5/8 Wave 10 / 11 / 12 Metre vertical antenna from Hy-Gain was a legend in the 70’s . . . now it’s back to prove its legendary status once again!
A Full-size radiator with lower radiation angle concentrates power closer to the ground, where you want it. Measures 22 foot, 9.5 inches. Larger diameter, heavy wall ply-tubular construction makes the new Super-Penetrator™ the absolute top omnidirectional antenna around! Four full-length radials and special machine-formed brackets give extra talk-power and overall strength.
Electrical performance has been increased to a new standard by the use of a longer radiator and double-matching tuning with linear phasing techniques that provide low SWR and more radiated energy. The double-matching also provides a DC path to ground to drain off precipitation static, giving an extremely low noise antenna capable of high power.
Handles 1.5 kilowatts.
SPT-500 Antenna Specifications Gain (dB)
5.3 dB SWR (at resonance)
Less than 1.2:1 Nominal input impedance
52 Ohms Lightning Protection
DC Ground Height
6.858 metres ( 22.5ft ) Radial Length
2.67 metres ( 8 ft 9 " ) Wind (Survival)
128 km/h ( 80 MPH ) Accepted mast size
3.175 cm to 4.5 cm ( 1 ¼” to 1 3/4 ”) OD