AIRBAND SCANNERS

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AIRBAND SCANNERS

Postby waxmax » Wed Oct 25, 2017 8:25 pm

Hello gents,
I'm undecided about which airband scanner to buy. Having previously bought an AR 109, I found it wasnt what i was looking for with poor reception, although im about 3 miles from manchester airport with no major buildings or hills preventing clear transmission. I also bough a better antenna , however this only made things worse.

I'm looking at purchasing either a Uniden UBC75XLT or a Uniden UBC125XLT.
What are these scanners like? Does anybody else have them?
Which is more suitable for listening to mainly civil airband?

Many thanks,
ERIC
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Re: AIRBAND SCANNERS

Postby m0lsx » Wed Oct 25, 2017 8:35 pm

Welcome to the forum :wave: :wave: :wave:

Of the two mentioned I would go for the 125 every time. It covers Military Air & a raft of other advantages.
But be warned the Unidens are a steep learning curve when it comes to driving them. They are great value scanners, but do take some time to get your head around.
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Re: AIRBAND SCANNERS

Postby waxmax » Wed Oct 25, 2017 8:39 pm

m0lsx wrote:Welcome to the forum :wave: :wave: :wave:

Of the two mentioned I would go for the 125 every time. It covers Military Air & a raft of other advantages.
But be warned the Unidens are a steep learning curve when it comes to driving them. They are great value scanners, but do take some time to get your head around.



HELLO,
Thanks for your reply.
I'm prepared to learn the scanners features and tricks. What is there reception like?
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Re: AIRBAND SCANNERS

Postby Minus1 » Thu Oct 26, 2017 9:41 am

Between 118 and 136.975 there are 760 25kHz wide channels, or potentially 2278 8.33 kHz wide channels.
There are very few scanners that handle 8.33 kHz properly - most just provide the steps not the bandwidth, nor the channel numbers.

The UHF Nato band (230-399.875) has over 6000 potential channels.

If you want to be able to enable and disable particular agencies quickly, you need to think about how many there are.

There are roughly 30 ATC transmitter sites around the country.

NATS list over 130 airports and airfields.
http://www.nats-uk.ead-it.com/public/in ... id=13.html

Then there are military airfields, ranges, agencies.

Do you want geo-location so that relevant freqs are automatically enabled/disabled as you move about the country?
(Handheld scanners do not have this facility, you'd need what are described as a 'base' scanner - but are in reality a 'mobile' scanner.)

Like everything else, it all depends what you want, and how much you want to spend.
I reserve the right to ignore people who have made no attempt to the read the manual, and expect others to do it for them.
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Re: AIRBAND SCANNERS

Postby waxmax » Fri Oct 27, 2017 11:52 am

Minus1 wrote:Between 118 and 136.975 there are 760 25kHz wide channels, or potentially 2278 8.33 kHz wide channels.
There are very few scanners that handle 8.33 kHz properly - most just provide the steps not the bandwidth, nor the channel numbers...

...Like everything else, it all depends what you want, and how much you want to spend.

still not sure about ubc75 or ubc125
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Re: AIRBAND SCANNERS

Postby m0lsx » Fri Oct 27, 2017 12:18 pm

waxmax wrote: still not sure about ubc75 or ubc125


What Minus one is saying is that neither of the radios you have specified does 8.33khz properly.
The manufacturer saying our advertised radio has 8.33khz steps is very different from saying our radio has the relevant filters fitted for use on 8.33khz steps.
Imagine an HGV & an average family car. You have different parking bays at motorway service areas designed for HGV's & cars.
Imagine the bays are 8.33 khz for cars & 25 khz for HGV's. Each bay is not just as wide as the vehicle but slightly wider.
My HGV will fit into your car parking area, but it will take up several bays.
The logic behind frequency steps is very similar to the above.
A 25khz step, does not mean that the radios are transmitting a 25 khz wide signal or that the receiver is 25 khz wide. The signals are slightly narrower, so that at a 25khz channel step there is room between each signal so that one signal does not, or should not interfere with the other.
At 8.33 khz, if the radio manufacturer has not changed the filter settings, you will stand a chance of hearing 3 separate transmissions. That is they are designing their radios & then selling them, knowing they will get interference from other channels on 8.33khz.
On our radios the frequency we listen to, is a line down the middle of that parking bay, the width of our vehicle spreading either side of that center frequency & hopefully never touching the edge. Clearly a 25khz wide radio receiver used on a 8.33khz step is very different to the right frequency width for the right parking bay. Even if my HGV will fit onto the car park, it's not what the car bay was designed for.
Buy a database from Kimmy JS19 via http://ukscanningdirectory.co.uk/
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Re: AIRBAND SCANNERS

Postby Minus1 » Fri Oct 27, 2017 4:09 pm

This post in a dutch forum has a nice little diagram of how three 8.33 kHz channels fit into ONE 25 kHz channel:
http://www.scannerforum.nl/index.php?topic=27764.0
I reserve the right to ignore people who have made no attempt to the read the manual, and expect others to do it for them.
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Re: AIRBAND SCANNERS

Postby Mark5R » Fri Oct 27, 2017 5:21 pm

For airband I honestly dont think you can beat the older uniden and realistic scanners for both reception and audio!

I've got new scanners digital and analogue but for the airband the old ones always work best for me! The filters on a lot of new scanners seem to affect the airband in a negative way in my user experience.

And the good news? You can pick them up cheap second hand on ebay. If you are listening at home go for a base scanner for the best audio.

The cons? Some models may have a slower scan rate than newer models. Also they will mostly have 5kHz, 10kHz, 12.5kHz, 25kHz and 50kHz steps. But in all honesty? Do you really need the new 8.33kHz steps on a scanner with 5kHz steps?
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Re: AIRBAND SCANNERS

Postby uniden125 » Thu Nov 02, 2017 12:07 pm

You might guess from my tag that I use a 125.

Can't tell you much to help your choice but it seems great and easy to use if you couple it with Nick Bailey's magic Scan125 software. viewtopic.php?f=2&t=3907

I'm 33 miles from Edinburgh airport and with the aerial supplied only manage to get aircraft in the air on approach etc plus the odd stuff going over.

I made a simple bazooka aerial and put it in the attic - two bits of vertical wire, coax and a BNC connector.
With that I get both sides of the conversations and all the ground frequencies - easy to test by searching for their ATIS transmissions although you'll probably get chat on most of their frequencies as it's busy.
Total cost - 100m of coax - You'll probably have 90m left over £15 at Toolstation. Similar - 10xBNC connectors £5
Calculation of lengths of the bits of wire - http://www.csgnetwork.com/antennaedcalc.html
No doubt the purists will correct everything I've done wrong and you'll hear about baluns and all that - but it works just fine for me.

My next step is to make one with the masses of extra cable and put it in some white 20mm trunking and fix it to the TV aerial support to get a bit more height.
Hope this helps your reception although it might not help your choice.

(Can I strap it to the metal support facing it towards the airport is my next question)
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