Tennadyne, L.L.C. - Antenna Facts

Best overall antenna performance appears to occur at an antenna height of about 1.5 wavelengths. On the other hand, heights over 3 wavelengths are most likely too high. -W2PV

We recommend that TENNADYNE antennas be positioned no lower than about .55 wavelengths high at the lowest operating frequency. That's around 38 FT as a minimum for one that bottoms out on 20M.

"F:B Ratio is as good or better than you claim and I find phenomenal nulls 90degrees from the heading. This is a marked improvement over the trap tri-bander that I was using." WØAP John McKinney [T8]

Free-Space Reference Antennas:
Conceptually, one can use free-space (fictitious) reference antennas, even though the real antenna is used over earth or ground. This has the difficulty, however, that one cannot experimentally make or use any of the reference antennas. Furthermore, the gain of an antenna referred to a free-space standard (dBi), even though quite correct, gives a value which is unnaturally high for most technical users. - W2PV

ANTENNA COMPARISONS (pdf)

MULTIPLE ANTENNAS ON THE SAME MAST (pdf)

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