Quagi Optimized 144.5 MHz, 147 MHz, 222 MHz, 432 MHz, 446 MHz. Table #1 ------------------------------------------------------------------------ 8 - El. Quagi Element Frequency Lengths 144.5 MHz 147 MHz 222 MHZ 432 MHZ 446 MHZ Ref.#1 86 5/8" 85" 56 3/8" 28" 27 1/8" DE #2 82" 80" 53 1/2" 26 5/8" 25 7/8" DI 35 15/16" to 35 5/16" to 23 3/8" to 11 3/4" to 11 1/16" to 35" in 34 3/8" in 22 3/4" in 11 7/16" in 11 1/16" in 3/16" steps 3/16" steps 1/8" steps 1/16" steps 1/16" steps Spacing: R-DE 21" 20 1/2" 13 5/8" 7" 6.8" DE-D1 15 3/4" 15 3/4" 10 1/4" 5 1/4" 5.1" D1-D2 33" 32 1/2" 21 1/2" 11" 10.7" D2-D3 17 1/2" 17 1/8" 11 3/8" 5.85" 5.68" D3-D4 26.1" 25 5/8" 17" 8.73" 8.46" D4-D5 26.1" 25 5/8" 17" 8.73" 8.46" D5-D6 26.1" 25 5/8" 17" 8.73" 8.46" Stacking distance between bays: 11" 10'10" 7'1 1/2" 3'7" 3'5 5/8" #1 All no. 12 (electrical) wire, closed loop. #2 All no. 12 wire loop, fed at bottom. Table #2 ------------------------------------------------------------------------ 432 MHz, 15 Element. Long Boom Data. Element Lengths. Interelement Spacing Inches Inches R 28" R - DE 7" D E 26 5/8" DE - D1 5 1/4" D-1 11 3/4" D-1 - D2 11" D-2 11 11/16" D-2 - D3 5 7/8" D-3 11 5/16" D-3 - D4 8 3/4" D-4 11 9/16" D-4 - D5 8 3/4" D-5 11 1/2" D-5 - D6 8 3/4" D-6 11 7/8" D-6 - D7 12" D-7 11 3/8" D-7 - D8 12" D-8 11 5/16" D-8 - D9 11 3/4" D-9 11 5/16" D-9 - D10 11 1/2" D10 11 3/4" D10 - D11 9 3/16" D11 11 3/16" D11 - D12 12 3/8" D12 11 1/8" D12 - D13 13 3/4" D13 11 1/16" (Note: Do not aluminum for the Boom, must be a nonconductor.) Boom: 1 x 2 in. x 12 ft. Douglas Fir, tapered to 5/8 in. at both ends. Driven element No. 12 TW copper wire loop in square configuration, fed at bottom center with type N connecter and 52 ohms coax. Reflector: No. 12 TW copper wire loop, closed at bottom. Directors: 1/8 in. rod passing through boom. ------------------------------------------------------------------------ The 144 MHz version is usally built on a 14 foot, 1 x 3 in. boom, with the boom tapered to 1 in. both ends. Clear pine is the best because of it's lightweight, but construstion grade Dougles fir works well. At 222 MHz he boom is under 10 foot long, and most builders use 1 x 2 or (preferably) 3/4 x 1 1/4 in. pine molding stock. At 432 MHz, except for longboom versions, the boom should be 1/2 in. thick or less. Be sure to measure all elements corectly 1/8" error results in performance deterioration. Tightly coil several turns of the feed line near the feed point to limit line radiation. In any case, the feed line should be kept at right angles to the antenna. Run it from the driven emement to the supporting mast and then up or down perpendicularly for best results. ------------------------------------------------------------------------ R and DE mounting: Wood or Plexiglas : : ------------------------------------------ | : o : | | O : boom : O | | wire : o : wire | ------------------------------------------ : : =========================================================================== If you would like to make an Antenna, Watch for the antennas that I will send. If you would like the plans from 220 up let me know. I NEED FOR ANTENNA BUILDERS THAT HAVE MADE DIFFERENT TYPES OF ANTENNAS SEND ME A ASCII ART COPY AND ALL INFO ON THEM, WHERE I CAN EXPAND THE CLUB COLLECTION. Thanks for your help. If you would like to join the Ascii Art Antenna club and get your club # contact me at my BBS address. =========================================================================== Some antennas come only in inch & foot measurements so use this to convert to cm. Converting English Measurements to Metric: 1 inch (1") = 2.5 cm 1 foot (1') = 30.48 cm Example: 42" X 2.54 cm = 106.7 cm Thanks to the ARRL Antanna Book Offered by Jack - KE4IQQ - AAAC #1 Address: @ KF4BPX.#OKE.FL.USA.NOAM