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Aircraft Antenna Vhf

Is it possible to use only one Aircraft Antenna for VHF Comm and VHF Nav using splitter?

Is it possible to use only one antenna for VHF Nav and VHF Comm using splitter in an aircraft?

Yes. However it is not called a splitter, but a diplexer or duplexer. See http://en.wikipedia.org/wiki/Diplexer

You will also get a few dB of loss on the receivers and also the one transmitter. Sometimes the size of the diplexer makes that solution not as practical as just using 2 different antennas, especially if the frequency is at VHF.

Garmin Vhf Antenna 0101085600 $18.77 Garmin Vhf Antenna 0101085600

Replacement Dc30 Vhf Antenna $15.94 Replacement Dc30 Vhf Antenna GARMIN REPLACEMENT DC30 VHF ANTENNA

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FLAT DIGITAL ANTENNA VHF/UHF $21.99 FLAT DIGITAL ANTENNA VHF/UHF

Icom Replacement Vhf Antenna FASC55V $16.11 Icom Replacement Vhf Antenna FASC55V

Antenna Vhf/Uhf/Fm Crossfire $83.99 ANTENNA VHF/UHF/FM CROSSFIRE

DC 40 Replacement VHF Antenna $18.94 DC 40 Replacement VHF Antenna Replacement VHF AntennaReplacement VHF Antenna that is made specifically for Garmin's Astro DC40.

4' Phase Iii VHF Antenna $261.94 4' Phase Iii VHF Antenna Shakespeare Phase III VHF Antenna - 4 8 - 4' PHASE III VHF ANTENNA

38" Vhf Marine Antenna $19.99 TRAM 1600-HC 38" VHF MARINE ANTENNA

5 Ft Vhf Marine Antenna $27.99 TRAM 1610-HC 5-FT VHF MARINE ANTENNA

8 Ft Vhf Marine Antenna $36.99 TRAM 1620-HC 8-FT VHF MARINE ANTENNA

West Marine Vhf 150 Replacement Antenna $19.99 West Marine Vhf 150 Replacement Antenna . VHF 150 Replacement Antenna

Replacement Dc30 Vhf Antenna(Pack of 1) $55.99 Garmin Replacement Dc30 Vhf Antenna

Garmin VHF Antenna $15.99 010-10856-00 2 Antenna Garmin Garmin, Ltd VHF Antenna Wireless Data Network www.garmin.com

Vhf 7In Rubber Duck Antenna $46.94 Vhf 7In Rubber Duck Antenna SHAKESPEARE VHF 7IN 5912 RUBBER DUCK ANTENNA

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What is the best antenna to build or buy for home VHF aviation band radio reception?

I just bought a decent scanner to try to hear aviation traffic in my area. I am 11 miles from Honolulu airport and 4 miles from Kaneohe Bay MCB airfield. Using the antenna that came with, I get almost nothing from HNL (just a little airline internal traffic in the 450MHz range). There are some hills between me and HNL. The "came with" is a telescoping antenna. The system calls for 50 Ohms. I read about 1/2 wave dipole, 1/4 wave ground plane, J bars, Yagi etc. I want to pick up the best sound I can from HNL, which is directional, while still getting non-directional aircraft, though most of them will also be in a similar direction, and still keep a little broad band. In short, I want it all. What are my best choices and compromizes. I am reasonably handy and can build my own or buy, and could even put in a couple phased antennas together if that would work. Any help appreciated, or direction to the best web references. Thank you for your time

Since you seem to want the "internal" stuff in addition to the normal AM stuff down in the 125MHz region, you're talking something fairly wide band.

Those hills may hurt you at the frequencies you hope to receive. VHF tends to be a line of sight proposition.

For general coverage of VHF in an "omni" fashion, you will either need an assortment of directional and tuned antennas with a switch, or you might want to consider a "discone" style antenna. The latter doesn't have a ton of gain, but it's a reasonable compromise most of the time. Get it up just as high as local rules and neighbors will tolerate. If the coax length starts getting upwards of 50 feet, you may want to consider some better quality coax (9913 or better instead of any of the lesser RG series coax) to avoid line loss. The stuff is stiff as a board, but you'll be able to hang onto whatever signal it is you can get off your antenna.

4 miles and 11 miles aren't that tough at VHF frequencies if you've got reasonable terrain. Wish I knew just how ugly those "hills" really are.

At least you'll be assured to pick up all of the aircraft side of these comms well with a discone.

Remember -- elevate that antenna!

Coax Sources (of many possible)

http://www.hamradio.com/

http://www.radiobooks.com/products/rf910.htm

http://radioworks.com/ccoax.html

Discone Sources (of many possible)

http://www.grove-ent.com/ANT9.html

http://www.hamradio.com/

http://www.mfjenterprises.com/products.php?prodid=MFJ-1866

As for the above, I've always had very good luck with Grove and Ham Radio Outlet. Can't speak for the others.

Tags: aircraft antenna vhf, aviation, harness

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