Update - Special Research Permits (501 to 504 kHz
Following representations made by the Radio Society of Great
Britain and negotiations by Ofcom with the Maritime and Coastguard
Agency, Ofcom has decided to extend the period of
Notices of Variation (NoVs) to the licence for operation in the 501 to
504 kHz band until 29 February 2012. The maximum
effective radiated power (e.r.p.) limit is maintained at 10 dBW (10 W).
Existing NoVs are due to expire at the end of February 2010.
There have been no reports of interference and investigation
has shown that a radiated power of 10 dBW is not likely to cause
interference. Moreover, NoV holders are permitted to operate only
subject to causing no interference.
Special Research Permits under a Notice of Variation to the Licence
are made available to holders of Full Amateur Licences on a case by case
basis to applicants who can demonstrate a genuine interest in
experimentation at these frequencies and provide adequate supporting
documentation for assessment.
Due to the usage of the spectrum around the 500 kHz bands,
applicants should pay special attention to demonstrating technical and
operational competence in terms of transmitting within the frequency
band and Effective Radiated Power (e.r.p.) parameters agreed with Ofcom.
Previous experience at 73 kHz as well as 136 kHz will be considered
desirable in this respect to ensure adequate steps are taken to limit
any potential interference.
Ofcom will monitor any interference reports and also consider
limiting numbers if necessary in reviewing operation in the band. On no
account will an e.r.p. level of greater than 10 dBW be permitted under
A fresh NoV will automatically be issued to existing NoV holders;
new applications are not required in this instance.
Should a fresh
NoV not be required or if you are in possession of an NoV which is not
required, please inform the Ofcom Licensing Centre stating your name,
call sign and Licence number preferably by e-mail to [email protected]
or alternatively by post to the address at the end of the text.
Form OfW306 is also available on request from the Ofcom Licensing
Ofcom Licensing Centre
Southwark Bridge Road
London SE1 9HA
Tel: 020 7981 3131
73 es GL