Turn off the mobile

[Adam Sampson]

Ian Mason <ukcrypto at sourcetagged.ian.co.uk> writes:

> Substitute single Li-Ion battery and stubby antenna and you're there.

Or even a plate antenna, as used in some versions of the Pye Pocketfone
police radios -- which were basically doing exactly this in the 1970s:
  https://sites.google.com/site/g3xbmqrp3/vuhf/pf8

-- 
Adam Sampson <ats at offog.org>                         <http://offog.org/>