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<body class='hmmessage'><div dir='ltr'>Can I once again point out that "the 5km radius for community stations" - coupled with the 25W horizontal plus 25W vertical "standard allowance" for FM is a nominal guide for Applicants and not a norm or a limit.<div>37 of the current 233 stations on air use more than that because they have conclusively shown Ofcom the level of power they need to cover their Community.<br>AM is influenced most I respectfully suggest by aerial design.</div><div>The answer to your last question Phil is "In practical terms - no".<br><br><div><div style="color:rgb(34, 34, 34);font-family:arial, sans-serif;font-size:12.8000001907349px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;widows:1;word-spacing:0px;background-color:rgb(255, 255, 255);"><font size="3"><b>Ian Hickling</b><br></font></div><font style="color:rgb(34, 34, 34);font-family:arial,sans-serif;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;widows:1;word-spacing:0px;background-color:rgb(255, 255, 255);font-size:12pt;" size="3"><font style="color:rgb(34, 34, 34);background-color:rgb(255, 255, 255);">Partner</font></font><br><br><a href="http://www.transplanuk.com/" target="_blank" style="color:rgb(17, 85, 204);"><img alt="" src="https://ci4.googleusercontent.com/proxy/2SkDsnIzSZgRbNnNKBSiwxiFhFQWRGV55mTjVL23fulnJpstZmYxeKrrYefY4qxiSgkMrAETld64XINLXCsujE_zI5gAsQyWeCWvHixcrNYtar3Sij4YlVBgN2NSQ-n2DsgZvrnpWZlfwCQ=s0-d-e1-ft#http://www.transplanuk.com/wp-content/uploads/2014/07/transplan_UK_weblogo_190x60.png"></a><div style="color:rgb(34, 34, 34);font-family:arial, sans-serif;font-size:12.8000001907349px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;widows:1;word-spacing:0px;"><i><font size="3">Office: 01635 578435 (7am-11pm UK time)</font></i></div><div style="color:rgb(34, 34, 34);font-family:arial, sans-serif;font-size:12.8000001907349px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;widows:1;word-spacing:0px;"><i><font size="3">Carphone: 07530 980115 (only responds when driving)</font></i></div><div style="color:rgb(34, 34, 34);font-family:arial, sans-serif;font-size:12.8000001907349px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;widows:1;word-spacing:0px;"><i><font size="3">6 Horn Street, Compton, NEWBURY, RG20 6QS</font></i></div></div><br><br><div>> To: cma-l@mailman.commedia.org.uk<br>> From: office@fantasyradio.co.uk<br>> Date: Wed, 16 Sep 2015 11:36:40 +0100<br>> Subject: [cma-l] community AM<br>> <br>> Indeed, Tony.<br>> <br>> Your figures fit in with my own experience over the years. Once again, <br>> the 5km radius for community stations works out.<br>> <br>> It's worth remembering that with AM, it's less affected by topography <br>> and even tx location. Does anyone know if Ofcom produce any helpful <br>> guidance or data in regard to AM? (er, sorry, medium wave)<br>> <br>> <br>> Phil<br>> <br>> On 16/09/2015 10:44, cma-l-request@mailman.commedia.org.uk wrote:<br>> > Send cma-l mailing list submissions to<br>> > cma-l@mailman.commedia.org.uk<br>> ><br>> > To subscribe or unsubscribe via the World Wide Web, visit<br>> > http://mailman.commedia.org.uk/mailman/listinfo/cma-l<br>> > or, via email, send a message with subject or body 'help' to<br>> > cma-l-request@mailman.commedia.org.uk<br>> ><br>> > You can reach the person managing the list at<br>> > cma-l-owner@mailman.commedia.org.uk<br>> ><br>> > When replying, please edit your Subject line so it is more specific<br>> > than "Re: Contents of cma-l digest..."<br>> ><br>> ><br>> > Today's Topics:<br>> ><br>> > 1. Re: AM community radio (Tony Bailey)<br>> > 2. AM community (fantasy office)<br>> ><br>> ><br>> > ----------------------------------------------------------------------<br>> ><br>> > Message: 1<br>> > Date: Wed, 16 Sep 2015 08:08:07 +0100<br>> > From: Tony Bailey <ravensound@pilgrimsound.co.uk><br>> > To: cma-l@mailman.commedia.org.uk<br>> > Subject: Re: [cma-l] AM community radio<br>> > Message-ID: <55F91557.6000009@pilgrimsound.co.uk><br>> > Content-Type: text/plain; charset="iso-8859-1"; Format="flowed"<br>> ><br>> > Ian et al,<br>> ><br>> > I've only ever used a 1 watt (just about) setup for AM RSLs and that<br>> > typically had to be running 15 Watts at the tx output valve. I've seen<br>> > bigger amps used but we had various antennas including a steel<br>> > telescopic mast, aluminium tube vertical, plastic drainpipes and a T<br>> > wire. The latter worked well with a 150 ft counterpoise earth running<br>> > about 450 mA aerial current. Reports from more than 50 miles but the<br>> > effective local coverage was around 3 miles in practice.<br>> ><br>> > Running my AM spreadsheet calculator it gives for comparison purposes<br>> > the 66 dB contour at 2.5 km (1 watt); 5 km (10 watts); 8 km (70 watts).<br>> > The last two probably equate to tx powers of 150 watts and 1000 watts.<br>> > I would think it might be worth pointing this out to prospective<br>> > licensees as there is clearly a significant cost/benefit issue here.<br>> ><br>> > Regards, Tony<br>> ><br>> ><br>> ><br>> > On 15/09/15 17:10, Ian Hickling wrote:<br>> >> Phil<br>> >> I'm not denying at all that AM has its advantages and uses - and<br>> >> believe me I wasn't being negative - just very down-to-earth practical<br>> >> We've run AM RSLs with a guyed 18m pole with a top hat - and we have<br>> >> one CR running with the ?3500 classic Radica hinged plastic flagpole<br>> >> antenna.<br>> >> But we're talking here about a minimum ?15,000 investment a for a<br>> >> 5-year contract with the absolute requirement of being able to sell<br>> >> lots of airtime on a robust reliable signal.<br>> >> So - if you can produce a 1kW transmitter that will perform to Ofcom's<br>> >> satisfaction and an ATU that will handle that - you have a customer<br>> >> sitting here waiting.<br>> >><br>> >> *Ian Hickling*<br>> >> Partner<br>> >><br>> >> <http://www.transplanuk.com/><br>> >> /Office: 01635 578435 (7am-11pm UK time)/<br>> >> /Carphone: 07530 980115 (only responds when driving)/<br>> >> /6 Horn Street, Compton, NEWBURY, RG20 6QS/<br>> >><br>> >><br>> >>> Date: Tue, 15 Sep 2015 13:52:18 +0100<br>> >>> From: office@fantasyradio.co.uk<br>> >>> To: cma-l@mailman.commedia.org.uk<br>> >>> Subject: [cma-l] AM community radio<br>> >>><br>> >>> Afternoon all,<br>> >>><br>> >>> For what it's worth, my own experience with AM is that you can get some<br>> >>> astonishing results! For several RSLs I have used a wire antenna, (an<br>> >>> inverted L) to great effect. The Earth mat consisting of wire netting<br>> >>> laid on the ground. Height is might as always, but even with only 20<br>> >>> metres, we were getting into Europe! I have reception reports to prove<br>> >>> it. I have also used a single 1 1/4" tube steel mast, with a 'top hat'<br>> >>> to increase top capacitance. I believe Radica used to do AM antennae<br>> >>> using a lamp post. (you can get a lamp post for about ?300) The<br>> >>> standard RSL AM licence is for 1 watt. This gives a similar coverage to<br>> >>> FM at 25watts. Oh yes, and I designed and built my own transmitters,<br>> >>> using valves!<br>> >>><br>> >>> Within the specified 5km radius for community radio, AM will do the job<br>> >>> nicely. (very important to get some good audio processing though) Also,<br>> >>> with fewer stations now on AM it could get better!<br>> >>><br>> >>> Anybody want to know more? mail me at phildawson@lemonmail.co.uk.<br>> >>><br>> >>> Phil Dawson<br>> >>> FANTASY RADIO97FM<br>> >>> Devizes<br>> >>> Wiltshire.<br>> >>><br>> >>><br>> >>><br>> >>> On 15/09/2015 12:00, cma-l-request@mailman.commedia.org.uk wrote:<br>> >>>> Send cma-l mailing list submissions to<br>> >>>> cma-l@mailman.commedia.org.uk<br>> >>>><br>> >>>> To subscribe or unsubscribe via the World Wide Web, visit<br>> >>>> http://mailman.commedia.org.uk/mailman/listinfo/cma-l<br>> >>>> or, via email, send a message with subject or body 'help' to<br>> >>>> cma-l-request@mailman.commedia.org.uk<br>> >>>><br>> >>>> You can reach the person managing the list at<br>> >>>> cma-l-owner@mailman.commedia.org.uk<br>> >>>><br>> >>>> When replying, please edit your Subject line so it is more specific<br>> >>>> than "Re: Contents of cma-l digest..."<br>> >>>><br>> >>>><br>> >>>> Today's Topics:<br>> >>>><br>> >>>> 1. Re: AMCR - SDR (Associated Broadcast Consultants)<br>> >>>> 2. AMCR - SDR (Ian Hickling)<br>> >>>> 3. Re: Confession (Two Lochs Radio)<br>> >>>><br>> >>>><br>> >>>> ----------------------------------------------------------------------<br>> >>>><br>> >>>> Message: 1<br>> >>>> Date: Tue, 15 Sep 2015 10:33:45 +0100<br>> >>>> From: Associated Broadcast Consultants <info@a-bc.co.uk><br>> >>>> To: The Community Media Association Discussion List<br>> >>>> <cma-l@mailman.commedia.org.uk><br>> >>>> Subject: Re: [cma-l] AMCR - SDR<br>> >>>> Message-ID:<br>> >>>> <CAG9-nrYO5ZHtH6B54QmMBYS1VZqzLaSJD39dX4W_jqJ_g95C3A@mail.gmail.com><br>> >>>> Content-Type: text/plain; charset="utf-8"<br>> >>>><br>> >>>> If anyone is interested I have Software Defined Radio for sale on<br>> >> Ebay at<br>> >>>> the moment. I've used the same type of unit to run a DAB test<br>> >> multiplex.<br>> >>>> I'm pretty sure I've recall that someone has already written the<br>> >> code to<br>> >>>> run it as a DRM transmitter.<br>> >>>><br>> >>>><br>> >> http://www.ebay.co.uk/itm/HackRF-One-Software-Defined-Radio-NEW-Unopened-FREE-Postage-BARGAIN-/271983417851?hash=item3f537999fb<br>> >>>> I can't help feeling though that the SDR is the "easy" part. The<br>> >> difficult<br>> >>>> part is getting an efficient aerial system.<br>> >>>><br>> >>>> Glyn<br>> >>>><br>> >>> _______________________________________________<br>> >>><br>> >>> Reply - cma-l@commedia.org.uk<br>> >>><br>> >>> The cma-l mailing list is a members' service provided by the<br>> >> Community Media Association - http://www.commedia.org.uk<br>> >>> Twitter: http://twitter.com/community_media<br>> >>> http://www.facebook.com/CommunityMediaAssociation<br>> >>> Canstream Internet Radio & Video: http://www.canstream.co.uk/<br>> >>> _______________________________________________<br>> >>><br>> >>> Mailing list guidelines:<br>> >> http://www.commedia.org.uk/about/cma-email-lists/email-list-guidelines/<br>> >>> _______________________________________________<br>> >>><br>> >>> To unsubscribe or manage your CMA-L mailing list subscription please<br>> >> visit:<br>> >>> http://mailman.commedia.org.uk/mailman/listinfo/cma-l<br>> >><br>> >> _______________________________________________<br>> >><br>> >> Reply - cma-l@commedia.org.uk<br>> >><br>> >> The cma-l mailing list is a members' service provided by the Community Media Association - http://www.commedia.org.uk<br>> >> Twitter: http://twitter.com/community_media<br>> >> http://www.facebook.com/CommunityMediaAssociation<br>> >> Canstream Internet Radio & Video: http://www.canstream.co.uk/<br>> >> _______________________________________________<br>> >><br>> >> Mailing list guidelines: http://www.commedia.org.uk/about/cma-email-lists/email-list-guidelines/<br>> >> _______________________________________________<br>> >><br>> >> To unsubscribe or manage your CMA-L mailing list subscription please visit:<br>> >> http://mailman.commedia.org.uk/mailman/listinfo/cma-l<br>> ><br>> <br>> _______________________________________________<br>> <br>> Reply - cma-l@commedia.org.uk<br>> <br>> The cma-l mailing list is a members' service provided by the Community Media Association - http://www.commedia.org.uk<br>> Twitter: http://twitter.com/community_media<br>> http://www.facebook.com/CommunityMediaAssociation<br>> Canstream Internet Radio & Video: http://www.canstream.co.uk/<br>> _______________________________________________<br>> <br>> Mailing list guidelines: http://www.commedia.org.uk/about/cma-email-lists/email-list-guidelines/<br>> _______________________________________________<br>> <br>> To unsubscribe or manage your CMA-L mailing list subscription please visit:<br>> http://mailman.commedia.org.uk/mailman/listinfo/cma-l<br></div></div> </div></body>
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