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Vintage Amateur and Military Radio Amateur/military receivers and transmitters, morse, and any other related vintage comms equipment. |
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5th Apr 2018, 3:19 pm | #1 |
Dekatron
Join Date: Apr 2012
Location: Worksop, Nottinghamshire, UK.
Posts: 5,554
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80 MHz band.
Does anyone off hand know what the band immediately below 88MHZ is used for these days?
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5th Apr 2018, 4:13 pm | #2 |
Nonode
Join Date: Mar 2010
Location: Dukinfield, Cheshire, UK.
Posts: 2,038
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Re: 80 MHz band.
I used to hear the AA (or similar) down there, but I don't think I've heard anything at all for ages.
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5th Apr 2018, 4:58 pm | #3 |
Dekatron
Join Date: Aug 2011
Location: Newcastle, Tyne and Wear, UK.
Posts: 11,586
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Re: 80 MHz band.
The band 68-88Mhz (roughly) is generally referred to as 'VHF low band', and in the UK is a PMR band and as such has been used by Fire services, Taxis, Mountain rescue services, and so on. A small section is / was also used by the military. But I'm guessing you really mean the 1MHz or so just below 88Mhz?
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5th Apr 2018, 4:58 pm | #4 | |
Tetrode
Join Date: Nov 2017
Location: East Lothian, Scotland, UK.
Posts: 66
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Re: 80 MHz band.
Quote:
In my location (Scotland) I have given up monitoring this band as I seldom heard anything. The split was -10MHz ( ie mobile operator was 10MHz below the base station). Last edited by tealandsilver; 5th Apr 2018 at 5:00 pm. Reason: Further info added re duplex operation |
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5th Apr 2018, 6:03 pm | #5 |
Nonode
Join Date: Jun 2010
Location: Spalding, Peterborough, Cambridgeshire, UK.
Posts: 2,859
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Re: 80 MHz band.
Back in the day, 85.850Mhz was Pye Telecom national transport scheme frequency for base tx. Base rx wad 72.350Mhz. Frequencies around 86-87Mhz used to be for simplex working.
Rob
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5th Apr 2018, 6:05 pm | #6 |
Moderator
Join Date: Mar 2012
Location: Fife, Scotland, UK.
Posts: 22,902
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Re: 80 MHz band.
75MHz is an international aviation spot frequency for outer, middle and inner markers on approach to a runway.
Then there's the 4m amateur band in the UK and some countries. David
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5th Apr 2018, 6:06 pm | #7 |
Nonode
Join Date: Jun 2010
Location: Spalding, Peterborough, Cambridgeshire, UK.
Posts: 2,859
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Re: 80 MHz band.
As well as the 13.5Mhz split for approx 72/85.5, there was another 10Mhz split around 77/87Mhz.
Rob
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Apprehension creeping like a tube train up your spine - Cymbaline. Film More soundtrack - Pink Floyd |
5th Apr 2018, 7:18 pm | #8 |
Dekatron
Join Date: May 2010
Location: Greater Manchester, UK.
Posts: 18,724
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Re: 80 MHz band.
HM Customs & Excise had an allocation around there in the early '90s
Lots of tailing suspects and all night stake-outs. Needless to say, I didn't listen myself The writers of the ITV series "The Knock" probably did listen, because they got a lot of the radio procedure correct. I imagine a lot of the drug gangs and contraband smugglers also had their "ears on" on such a covenient frequency, just below the Jimmy Young Show
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5th Apr 2018, 11:29 pm | #9 |
Dekatron
Join Date: Apr 2012
Location: Worksop, Nottinghamshire, UK.
Posts: 5,554
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Re: 80 MHz band.
The reason I asked is that 30 years ago I was given a set and was told it was a taxi radio and it has been kicking around in my box of bits for a very long time.
When I got my first frequency counter I keyed it up and got a frequency just below FM. If it turns up during spring cleaning I was wondering what to do with it. |
5th Apr 2018, 11:37 pm | #10 |
Dekatron
Join Date: Aug 2011
Location: Newcastle, Tyne and Wear, UK.
Posts: 11,586
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Re: 80 MHz band.
If you hold an intermediate or full amateur radio licence you may be able to move it down to the 4 metre (70.000MHz to 70.500Mhz) band. Can you tell us the make (Tait, Dymar, Philips, Pye, Storno, Motorola perhaps?) and model?
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6th Apr 2018, 12:59 am | #11 |
Dekatron
Join Date: Apr 2012
Location: Worksop, Nottinghamshire, UK.
Posts: 5,554
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Re: 80 MHz band.
I think it is a GEC.
I have found a photo from about 5 years ago taken during another tidy up. |
6th Apr 2018, 10:46 am | #12 |
Dekatron
Join Date: Jul 2008
Location: Charmouth, Dorset, UK.
Posts: 3,601
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Re: 80 MHz band.
I used to operate in that band for many years. I had a PMR license from 1966 until mobile phones became cheaper than the cost of the license.
I bought a secondhand Westminster base station from Henry Westlake of ham radio fame, it was ex Devon council so had to change the crystals, if it had been ex Cornwall council I would't have needed to as they were on the same frequency as me. Peter |
6th Apr 2018, 12:39 pm | #13 |
Dekatron
Join Date: Apr 2012
Location: Worksop, Nottinghamshire, UK.
Posts: 5,554
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Re: 80 MHz band.
Yes the crystals would have to be changed.
I will have to wait and see if it turns up again during my spring cleaning. There is 4 spaces for crystal pairs. |