[cma-l] AM community radio

[Fantasy Radio Office]

Afternoon all,

For what it's worth, my own experience with AM is that you can get some 
astonishing results! For several RSLs I have used a wire antenna, (an 
inverted L) to great effect. The Earth mat consisting of wire netting 
laid on the ground. Height is might as always, but even with only 20 
metres, we were getting into Europe! I have reception reports to prove 
it. I have also used a single 1 1/4" tube steel mast, with a 'top hat' 
to increase top capacitance. I believe Radica used to do AM antennae 
using a lamp post. (you can get a lamp post for about £300)  The 
standard RSL AM licence is for 1 watt. This gives a similar coverage to 
FM at 25watts. Oh yes, and I designed and built my own transmitters, 
using valves!

Within the specified 5km radius for community radio, AM will do the job 
nicely. (very important to get some good audio processing though) Also, 
with fewer stations now on AM it could get better!

Anybody want to know more? mail me at phildawson at lemonmail.co.uk.

Phil Dawson
FANTASY RADIO97FM
Devizes
Wiltshire.



On 15/09/2015 12:00, cma-l-request at mailman.commedia.org.uk wrote:
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>     1. Re:  AMCR - SDR (Associated Broadcast Consultants)
>     2.  AMCR - SDR (Ian Hickling)
>     3. Re:  Confession (Two Lochs Radio)
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> ----------------------------------------------------------------------
>
> Message: 1
> Date: Tue, 15 Sep 2015 10:33:45 +0100
> From: Associated Broadcast Consultants <info at a-bc.co.uk>
> To: The Community Media Association Discussion List
> 	<cma-l at mailman.commedia.org.uk>
> Subject: Re: [cma-l] AMCR - SDR
> Message-ID:
> 	<CAG9-nrYO5ZHtH6B54QmMBYS1VZqzLaSJD39dX4W_jqJ_g95C3A at mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> If anyone is interested I have Software Defined Radio for sale on Ebay at
> the moment.  I've used the same type of unit to run a DAB test multiplex.
> I'm pretty sure I've recall that someone has already written the code to
> run it as a DRM transmitter.
>
> http://www.ebay.co.uk/itm/HackRF-One-Software-Defined-Radio-NEW-Unopened-FREE-Postage-BARGAIN-/271983417851?hash=item3f537999fb
>
> I can't help feeling though that the SDR is the "easy" part.  The difficult
> part is getting an efficient aerial system.
>
> Glyn
>