CB Channels

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CB Channels

Postby Southwales » Sun Jan 21, 2018 2:16 am

Hi, I have the 40 UK FM cb channels in my scanner, are there any other cb channels such as AM and are they used in the UK.

Also has anyone ever heard Iss on 145.800?
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Re: CB Channels

Postby m0lsx » Sun Jan 21, 2018 9:23 am

I have spoken to the ISS a couple of times & I know others who have also.
With the ISS what you need to remember is that you are only going to be within it's footprint for around 5 - 9 minutes at the most & how long will depend upond how high they are above the horizon to you. Also don't forget Doppler. In general the shift is no more than + or - about 3 khz.But that again is dependent upon how high it is above the horizon. The approach is a plus, the away is a minus, so a shift of around 5 Khz is about what you would expect.
Set your radio for 145.795, 145.800 & 145.805 & you will hear every pass when they are chatting with clarity. But don't forget this is not active all the time & sometimes they use SSTV on it.
With CB it's now 80 channels not 40 & they legally have SSB too. So don't expect too much on the 40 channels. Also if you are listening on a handheld antenna don't expect much at all, even if they are there.
CB is active in some locations & dead in others. But as a whole don't expect too much as it's only a few who still use it & most of them split their time between the Amateur radio repeaters & CB.
AM activity on CB is rare., although you could build yourself a small Beat Frequency Oscillator or use a second radio to resolve SSB. You use the second radio on a dead channel to use it's oscillator to resolve what the main radio is hearing. It's how we listened to SSB on the old non SSB radios, either built a small BFO or used a cheap AM radio to do the job.
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Re: CB Channels

Postby A N Tenner » Mon Jan 22, 2018 1:03 pm

m0lsx wrote:I have spoken to the ISS a couple of times & I know others who have also.
With the ISS what you need to remember is that you are only going to be within it's footprint for around 5 - 9 minutes at the most & how long will depend upond how high they are above the horizon to you. Also don't forget Doppler. In general the shift is no more than + or - about 3 khz.But that again is dependent upon how high it is above the horizon. The approach is a plus, the away is a minus, so a shift of around 5 Khz is about what you would expect.
Set your radio for 145.795, 145.800 & 145.805 & you will hear every pass when they are chatting with clarity. But don't forget this is not active all the time & sometimes they use SSTV on it.
With CB it's now 80 channels not 40 & they legally have SSB too. So don't expect too much on the 40 channels. Also if you are listening on a handheld antenna don't expect much at all, even if they are there.
CB is active in some locations & dead in others. But as a whole don't expect too much as it's only a few who still use it & most of them split their time between the Amateur radio repeaters & CB.
AM activity on CB is rare., although you could build yourself a small Beat Frequency Oscillator or use a second radio to resolve SSB. You use the second radio on a dead channel to use it's oscillator to resolve what the main radio is hearing. It's how we listened to SSB on the old non SSB radios, either built a small BFO or used a cheap AM radio to do the job.


Is this achievable with handheld and whip M0ls? assuming ideal conditions and that...
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Re: CB Channels

Postby Minus1 » Mon Jan 22, 2018 1:25 pm

Southwales wrote:Also has anyone ever heard Iss on 145.800?


You can occasionally hear the downlink from the ISS to RosCosmos on 143.625 FM in Russian.

And I once caught the 'Zarya' downlink on 130.167, though you'll also catch the edge of some airport handling freqs on 130.175.
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Re: CB Channels

Postby m0lsx » Mon Jan 22, 2018 1:26 pm

Yes you will hear the Space station on a handheld, but for a reduced amount of time.
I use to listen to the old Russian space station Mir on my old Realistic handheld back in the 90's.

Edited to add. One of the two occasions I have spoken to the ISS was in the car using 10 watts into a 5/8th wave whip in the middle of a housing estate with flats on two sides of me. It does not take sophisticated kit to hear the ISS, just luck.
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Re: CB Channels

Postby A N Tenner » Mon Jan 22, 2018 4:29 pm

m0lsx wrote:Yes you will hear the Space station on a handheld, but for a reduced amount of time.
I use to listen to the old Russian space station Mir on my old Realistic handheld back in the 90's.

Edited to add. One of the two occasions I have spoken to the ISS was in the car using 10 watts into a 5/8th wave whip in the middle of a housing estate with flats on two sides of me. It does not take sophisticated kit to hear the ISS, just luck.


Forgive the 20 questions but "spoken"? did you transmit back to them??
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Re: CB Channels

Postby m0lsx » Mon Jan 22, 2018 4:57 pm

To ISS? Yes, they have a Amateur Radio station onboard. ARISS = Amateur Radio on the International Space Station.
http://www.ariss.org/

Alfie posted the following thread about working the ISS back in 2015.
http://ukradioscanning.com/viewtopic.php?t=3816&p=19815

There are also numerous Amateur radio Satellites up there, some are voice some SSTV (Slow Scan TV,) or other digital modes.
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Re: CB Channels

Postby m0lsx » Mon Jan 22, 2018 5:01 pm

SilverShadow posted the following about the ISS frequencies back in 2012..


https://ukradioscanning.com/viewtopic.php?t=50&p=887
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