VHF Spectrum Release
70.5 – 71.5 MHz
2-April-2015: Ofcom have agreed the use of 70.5 MHz to 71.5 MHz by radio amateurs for digital experimentation.
Use is permitted only via a Ofcom Special Research Permit application. See Here for further information
146 – 147 MHz
The 146-147 MHz band was first made available to Full Licensees only (including Club/Reciprocal), by a NoV for October 2014-2015. For the current NoV version, Ofcom has agreed to a Society request that means the exclusion of certain NGR squares as per the map opposite is no longer an explicit restriction. However in order to achieve compliance with the condition re the ‘HCM agreement’, those squares are where particular caution is still required. Achieving compliance with the HCM condition may require lower power than the NoV erp limit, or use of directional antennas that must beam away from international borders.
NoV restrictions include absolute band limits, and a band limit of 146.9375MHz in or within 40km of Scotland, as well as compliance with the HCM agreement. Maximum permitted antenna height is 20m above ground level.
Further information on the Harmonised Calculation Method (HCM) agreement referred to in the NoV is available here.
Amongst other things, VHF release in the 71 and 146-147 MHz bands has been key to spurring innovation in Reduced Bandwith Digital ATV (RB-DATV). For an examples see below:
- RB-DATV Update, RadCom Oct-2016
- RB-DATV – RSGB Convention Presentation, Oct-2016 (courtesy of BATC)
- RB-TV – (BATC CQ-TV Special, May-2015)
March-2017: Ofcom has agreed an updated NoV with a 50 W erp limit (formerly 25 W erp). Holders of previous NoVs need to re-apply should they wish to use the increased power.
The original Ofcom call for input regarding VHF spectrum was in 2012. Our joint input developed in the Spectrum Forum was based on innovative digital communications:-
On 10th October 2014 Ofcom published a statement confirming their proposals for the release of VHF Spectrum in the 143-169MHz range. This included a proposal regarding temporary amateur use of 146-147 MHz, based on our previous submissions in 2012 and 2014 (see background below).
- RSGB: 146-147MHz Initial Band Plan – 30-Oct-2014 (see also FAQ below)
- RSGB: 146-147MHz Licence, Usage and Band Planning FAQs – 27-Oct-2014
- RSGB: 146-147MHz Convention Presentation – 12-Oct-2014
- Ofcom: Statement on 143-169MHz – 10-Oct-2014
- Ofcom: 143-169 MHz Consultation – March 2014
- RSGB: Joint-Response – May 2014
- The 2014 RSGB Convention Presentation above provides an overview of the opportunity for innovation in 146-147 MHz.
- The Society’s wider work in relation to spectrum management, including the 2012 response above, can be found by following:
About Us > Committees > Spectrum Forum > SF-Papers and Consultations.