[cma-l] AMCR - SDR

[Ian Hickling]

For us - the easy part is getting an efficient aerial system!
Been doing it for 50-odd years!

Ian Hickling
Partner

Office: 01635 578435  (7am-11pm UK time)Carphone: 07530 980115 (only responds when driving)6 Horn Street, Compton, NEWBURY, RG20 6QS

Date: Tue, 15 Sep 2015 10:33:45 +0100
From: info at a-bc.co.uk
To: cma-l at mailman.commedia.org.uk
Subject: Re: [cma-l] AMCR - SDR

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

-- 
Glyn Roylance - Principal Consultant 

Associated Broadcast Consultants
 





On 15 September 2015 at 08:16, Tony Bailey <ravensound at pilgrimsound.co.uk> wrote:

  
    
  
  
    Hello Marc et al,

      

      I mentioned DRM on AM because it would be easily implemented in a
      software box.  I think the Talk 107 test used two programme
      channels on one FM carrier.  In fact the main issue with medium
      wave is getting a stable earth system without ploughing a field! 
      Antennas can be short (most RSLs use them) but they aren't very
      efficient due to being very small impedance compared to the
      ground.  As has been pointed out this isn't a problem if you can
      site the antenna in (or on) water.  I wondered if given that SDR
      requires an rf box maybe a clever designer could come up with a
      low impedance amp that could include matching directly connected
      to the vertical antenna sitting on a ground plane.

      

      Regards,  Tony

      




_______________________________________________

Reply - cma-l at commedia.org.uk

The cma-l mailing list is a members' service provided by the Community Media Association - http://www.commedia.org.uk
Twitter: http://twitter.com/community_media
http://www.facebook.com/CommunityMediaAssociation
Canstream Internet Radio & Video: http://www.canstream.co.uk/
_______________________________________________

Mailing list guidelines: http://www.commedia.org.uk/about/cma-email-lists/email-list-guidelines/
_______________________________________________

To unsubscribe or manage your CMA-L mailing list subscription please visit:
http://mailman.commedia.org.uk/mailman/listinfo/cma-l 		 	   		  
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.commedia.org.uk/pipermail/cma-l/attachments/20150915/2d39d3bf/attachment.html>