Helimeds help

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Helimeds help

Postby Fire1160 » Sat Dec 30, 2017 3:44 am

Hi everyone hope you all had a grate xmas i did ive got a little more saved for the new scanner what id like help with has anyone got frequencies for the helimeds i have the hmcg stuff im also hopeing to back this up with plain spotter on the laptop the new scanners going to be the bct15x any help will be grately appreciated
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Re: Helimeds help

Postby m0lsx » Sat Dec 30, 2017 9:17 am

They have to use normal airband frequencies. But the communication between base, other ambulances etc are done via the Tetra system & yet other comms will be via mobile phone, so not open to most listeners.
You may also find your local service also has a in the open base the helicopter link on one of the airband frequencies too, in the same way that some other operators do.
Another set of frequencies to listen to are the in helicopter person to person comm's which although very low powered are also often in the clear, if you are close enough to hear them.
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Re: Helimeds help

Postby Minus1 » Sat Dec 30, 2017 10:14 am

TETRA AGA channels 1 to 8 are the primary channels, and although you can't listen to anything you can detect activity on the mobile frequencies.
Though you don't know if it is police or helimed.
394.8125 - 394.9875 MHz and the corresponding mobile freq 10 MHz lower.

Here are the AGA channels I've managed to locate so far:
394.8125 TETRA AGA:1 Inverness?
394.8125 TETRA AGA:1 Leeds area?
394.8375 TETRA AGA:2 WME057O Romsley, Worcs
394.8375 TETRA AGA:2 Penrith/Cumbria area?
394.8625 TETRA AGA:3 NHA025 Cold Ashby, Northamptonshire
394.8625 TETRA AGA:3 NOR175O Poolewe, Higland
394.8875 TETRA AGA:4 (Not found so far)
394.9125 TETRA AGA:5 NHU036 Chatton Sandyhills, Northumberland
394.9125 TETRA AGA:5 NWA002O Cryn-y-Brain, North Wales
394.9125 TETRA AGA:5 London area?
394.9375 TETRA AGA:6 WinterHill, Lancs?
394.9625 TETRA AGA:7 DAC201A Milton Damerel, Devon
394.9625 TETRA AGA:7 Greenloaning (Perth area)?
394.9875 TETRA AGA:8 Ashford, Kent?
394.9875 TETRA AGA:8 SouthWales?
394.9875 TETRA AGA:8 EastMidlands?

I also think lower TMO channels (1 to 33) are used for air comms as these channels are less used and those that are - are more widely spaced.
I frequently hear activity on these, yet they are too far away to pick up ground units.
390.1625 - 390.9625 and the corresponding mobile freq 10 MHz lower.

Find your local base freqs and you'll know which mobile freqs to scan.

As analog scanners are not designed to pick up these transmissions, using frequencies lightly offset (e.g. 6.25 kHz high) can achieve better results, depending on your scanner.
You'll have to experiment.

122.95 DEPCON (Heli departures outside any controlled airspace)
123.1 MHz (SAR) is also occasionally used for air to air comms, e.g. two helis flying in close proximity.
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Re: Helimeds help

Postby Fire1160 » Sat Dec 30, 2017 4:23 pm

Thankyou both so much that was extreamly helpfull and informative much appreciated and thankyou
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Re: Helimeds help

Postby mickydt » Sun Jan 07, 2018 3:25 pm

i was all ways wondering that helimeds must use ordinary frequencies besides tetra but could never find them and of this morning picked up a helimed on 125.475am getting both ways.
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Re: Helimeds help

Postby thelad » Sun Jan 07, 2018 8:24 pm

mickydt wrote:i was all ways wondering that helimeds must use ordinary frequencies besides tetra but could never find them and of this morning picked up a helimed on 125.475am getting both ways.
Most Helicopter Helimeds transit low level so ATC coms will be heard when they transit in a ATC radar area or zone E.G. a airports airspace.
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