Home |
Search |
Today's Posts |
#21
![]() |
|||
|
|||
![]()
"Fractenna" wrote in message
... Any feed back? If you desire a single antenna with excellent SWR match at many bands, then I am of the opinion that there is value here. Even the most efficient horizontal dipole is almost useless for DX--the assumed need, not NVIS-- unless it is high up. This is because all low dipoles have low gain at low elevations: Their launch angle is quite high. I would suspect that typical ohmic losses on the BW are 2-5 dB. The mismatch lsses are negligible. Getting this well over a wave high at the lowest freq of operation will afford at least that, and probably more, in a gain differential at low angles, compared to an efficient, low dipole. The point: a high BW antenna will work well. Any low dipole will work poorly. The in-between is a valid issue to ponder. 73, Chip N1IR Chip, how did we digress to comparing a "high B&W" to a "low dipole"? When the two are each at their optimal height (and why would we ever compare anything else..) then the dipole has it all over a B&W. I use my (amost 1/2 wave height) dipole only for DX, without a tuner on it's two resonant frequencies and with a tuner on two bands well above, with amazing results. 5, 8, 11 and 15 mhz to Alaska, Equador, Venezuela and Canadian Maritimes, if that qualifies as "DX". 73 Jack Painter Virginia Beach, Va |
Thread Tools | Search this Thread |
Display Modes | |
|
|
![]() |
||||
Thread | Forum | |||
Good Moble HF Antenna - Suggestions / Comments? | Antenna | |||
Good HF Antenna and Location on Semi? | Antenna | |||
APS 13 DX Antenna with a good 70s tuner | Antenna | |||
Poor quality low + High TV channels? How much dB in Preamp? | Antenna | |||
Super Broomstick....Any good? | Antenna |