Transmission1

Has any one monitored these freqs, trying to find the split 14.5 ? Thanks

These are simplex channels. No split needed!

What exactly you picking up mate?

Sorry for late reply. Encrypted speech can see the ID's & TG's ok think poss St Mawgan.
Will go up that way & verify.
DMR at Culdrose too a chan in 444Mhz crypto so expect security.

443.550 - What it is used for:
FM Repeaters: This frequency is frequently set up as a repeater input/output, allowing handheld or mobile radios to communicate over longer distances by bouncing signals off the repeater.
Digital Voice: It supports digital modes like Yaesu System Fusion (C4FM), enabling connections to global networks like WIRES-X.
Special Events: Clubs use it for temporary operations, like the Hampstead Hams club did for a historical anniversary.

Band: 70cm (UHF).
Mode: Analogue FM (with tone) and Digital (C4FM).
Offset: Often +5 MHz (meaning you transmit on 443.550 MHz to reach the repeater, which transmits back on 448.550 MHz, or vice versa depending on configuration).
In short, if you hear 443.550 MHz, you're likely listening to local amateur radio activity, probably a repeater in the UHF band.

443.6125 - Amateur Radio Use: The wider band from 430 MHz to 440 MHz is allocated to licensed radio amateurs in the UK. Within this band, specific frequencies like 443.6125 MHz are often coordinated for repeater outputs or digital-only operations.

DuncanH
I think you have the frequencies mixed up, Ham Band is 430 to 440 MHz So 443MHz is not in the uk 70cm ham band
As previously said they are simplex pmr frequencies.

443.6125 is a Brandmeister frequency which is part of a worldwide amateur digital network.

DuncanH wrote: 09 Dec 2025, 22:47 443.6125 is a Brandmeister frequency which is part of a worldwide amateur digital network.

NOT IN THE UK IT ISN'T.

The UK 70cm Ham band is 430 to 440 MHz
https://www.ofcom.org.uk/siteassets/res ... f?v=386197

In the USA its 420 to 450 but definitely not in the UK.