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Scanner Antennas  
User currently offlineW_a_s_p_i_e From United Kingdom, joined Feb 2002, 170 posts, RR: 0
Posted (11 years 5 months 1 week 3 days 3 hours ago) and read 3697 times:

Hi guys. Since a lot of you guys are tech people, i thought it would be best to ask you. I have a scanner, and I want to increase my reception. It has a BNC (I think thats what its called) connector at the top.
Could you please tell me what price range i would be looking at to increase my reception, by quite a lot, and where I should look.
Thanks
Mark

12 replies: All unread, jump to last
 
User currently offlineH. Simpson From United States of America, joined Mar 2001, 949 posts, RR: 3
Reply 1, posted (11 years 5 months 1 week 3 days 1 hour ago) and read 3680 times:

It depends on how good the quality the antenna you want. Some outdoor antennas (called discone, if i'm not mistaken) can run about $40-90 USD, big improvement if u place one on the rooftop.

I have a telescoping whip with a BNC connection from Radio Shack, that one runs about ~$10 and it's a great performer! Big grin

Remember that 90% of the time the stock antenna is a poor performer, and also try to find out the "gain" of the antenna before you purchase. In the VHF (airband) range, the higher the gain, the better it will be


good luck!
Dennis


User currently offlinePPGMD From United States of America, joined Sep 2001, 2453 posts, RR: 0
Reply 2, posted (11 years 5 months 1 week 2 days 23 hours ago) and read 3640 times:

In the cub I have one that I can attach to the window with a suction cub and it works great. I believe it's pretty cheap too if you buy it from Aircraft Spruce or Sporties.


At worst, you screw up and die.
User currently offlineAirplay From , joined Dec 1969, posts, RR:
Reply 3, posted (11 years 5 months 1 week 2 days 17 hours ago) and read 3623 times:

In the world of VHF antennas, its not the price you pay, its the height that counts. VHF frequencies don't "bounce" so well so line of sight is the rule of thumb.

If you can get that thing up high, you'll increase your performance even if you're using a coat hanger for an antenna.

One of the problems though, is that the longer you make the antenna lead, the more loss you'll have in the line. This isn't usually significant until you need more than 50 feet. Even in that case you can use low loss cable like RG-8 (50 ohms) cable.


User currently offlineB747skipper From , joined Dec 1969, posts, RR:
Reply 4, posted (11 years 5 months 1 week 2 days 14 hours ago) and read 3601 times:

I have a Sony 2001 radio (HF and VHF) - For reception of VHF at home the antenna (Sony AN-1) is installed high on the roof, the antenna comes with a 15 meters long coaxial cable to connect to the radio - BNC connection -
xxx
The Sony AN-1 was about US$ 75.oo when I bought it, but that was some 15-20 years ago, I understand it is still sold commercially, same as the AN-3, the active HF antenna which I use for HF reception... that one is some $150.oo -
xxx
Since it is VHF, place the antenna as high as you can (line of sight) -
(s) Skipper


User currently offlineWardialer From United States of America, joined Sep 2001, 1183 posts, RR: 0
Reply 5, posted (11 years 4 months 4 weeks 14 hours ago) and read 3507 times:

It also depends on the type of scanner and esp. the location. In my case, I live about 25 miles from KLAX and I just cant pick up ATC. Because why? Well, there are these hills called the Hollywood Hills, and believe me they do have an impact. The highest peak of them all is about 1800 feet (Mt. Lee).

As stated above, these could have alot of impact. Also, get a good rotator, I use one for my radio what I use to talk on Ham Radio. Line of Sight is the the the MOST important of all.

Since I just received my FCC tech license for Ham Radio, if you guys need some answers than fill free to ask to me.


User currently offlineL-188 From United States of America, joined Jul 1999, 29799 posts, RR: 58
Reply 6, posted (11 years 4 months 4 weeks 10 hours ago) and read 3497 times:

The height of the antena is a big factor, not to understate that line of sight is also critical.

If you want to attempt to be real highspeed, you could always build your own antenna.

Go and buy an ARRL handbook. They usually have some pretty good information on antenna construction in them.

You mainly need two ceramic insulators, and a wire as the major components if you want to build your own.



OBAMA-WORST PRESIDENT EVER....Even SKOORB would be better.
User currently offlineJetTrader From United Kingdom, joined Oct 2001, 586 posts, RR: 11
Reply 7, posted (11 years 4 months 3 weeks 6 days 3 hours ago) and read 3459 times:


A simple home-made antenna will work better than any discone...provided you "tune" it for the required frequency of operation.

For a frequency of 120Mhz (somewhere near the middle of the airband - you can of course use a more specific frequency like your local tower or approach) the wavelength is 2.5 metres...give or take a few mm  Smile/happy/getting dizzy

A simple half wave dipole, resonant at this frequency, can then be constructed using a length of wire just 1.25 metres long.

Cut your length of wire in half and attach it to a suitable length of dowel (or similar). Attach a length of 50 ohm co-ax to the centre point (where you made the cut) ...making sure there is about an inch gap and that there is no short circuit.

Attach a BNC connector to the other end of the coax and you're good to go!  Big thumbs up

Any book (or website!) on antenna theory will include diagrams and probably better instructions. I use one of these and it really pulls in those stations that would otherwise be down in the noise!

You can do it!

Cheers,
Dean (qualified ham radio op. G0RIF)



Life's dangerous. Get a f**king helmet!
User currently offlineH. Simpson From United States of America, joined Mar 2001, 949 posts, RR: 3
Reply 8, posted (11 years 4 months 3 weeks 6 days 2 hours ago) and read 3423 times:

Also...look for those antennas have "magnet mount", those magnetic mount can "stick" your antenna on a metal object and it acts as a ground. The bigger the "metal object" (ie. Car) the better the antenna perform!

I have my VHF/UHF antenna placed on up of my radiator with a magnet mount and it works WELL!

Take care,
Dennis (another ham radio op. N2KIN)

p.s. I wonder how many ham radio operator are in this forum? Give me a shout!


User currently offlineL-188 From United States of America, joined Jul 1999, 29799 posts, RR: 58
Reply 9, posted (11 years 4 months 3 weeks 5 days 22 hours ago) and read 3395 times:

I am not H. Simpson.

But I was US Army Signal Corp a decade ago.

Learn some things but never really got the chance to practice them!

Want to pick up HAM someday but not right now, Got to pay for school, not the Gear!

And those Collins R 390's aren't cheap.....

BOATANCHORS RULE!!!!



OBAMA-WORST PRESIDENT EVER....Even SKOORB would be better.
User currently offlineH. Simpson From United States of America, joined Mar 2001, 949 posts, RR: 3
Reply 10, posted (11 years 4 months 3 weeks 4 days 16 hours ago) and read 3362 times:

lol...well good luck and I;m sure you will come back one day with the Collins  Big thumbs up

User currently offlineL-188 From United States of America, joined Jul 1999, 29799 posts, RR: 58
Reply 11, posted (11 years 4 months 3 weeks 4 days 16 hours ago) and read 3363 times:

I'd love to but that might be difficult

The Collins is just a reciever...I have no way to transmit  Crying



OBAMA-WORST PRESIDENT EVER....Even SKOORB would be better.
User currently offlineHerman From Singapore, joined Jul 2000, 231 posts, RR: 0
Reply 12, posted (11 years 4 months 2 weeks 2 days 18 hours ago) and read 3484 times:

I'm using ICOM. By the way, what is a BNC connection? I'm living roughly about 13miles away from the airport. At certain times of the day/night I can receive ATC depending on which frequency.

Any tips how I can improve the reception.

Thanks


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