XPost: rec.radio.amateur.policy, uk.radio.amateur   
   From: ianREMOVETHISjackson@g3ohx.co.uk   
      
   In message , Jimmy Stewart ...   
    writes   
   >On 03/03/2021 16:11, Brian Morrison wrote:   
   >> On Wed, 03 Mar 2021 14:45:20 +0000, Jimmy Stewart ... wrote:   
   >>   
   >>>> The problem was that in a supermarket carpark, customers were   
   >>>>having   
   >>>> trouble locking and unlocking their cars. Is it possible that the OFCOM   
   >>>> engineer actually found that he needed to do a bit of urgent on-the-job   
   >>>> shopping?   
   >>> I used to stop lazy buggers getting into their cars parked in the drop   
   >>> off zone at a local car park by calling cq on 70cm ...   
   >>  As you are a licensed user of the frequency, you have priority over   
   >>the   
   >> unlicensed, unprotected short range devices used for these purposes. Of   
   >> course people who are not aware of this still get annoyed when their key   
   >> fobs don't get received by the nasty super-regen receivers in their car.   
   >> They should direct their annoyance at the PTTs who decided the 433MHz ISM   
   >> allocation should go ahead in the mid 1980s.   
   >>   
   >bitter bitter and twisted....best use for the 70Cm band   
      
   With my last two cars, the range that I can lock and unlock is at least   
   100 yards. Is this not far too great? Either the receiver is far too   
   sensitive, or the fob TX too powerful. I would have thought that a range   
   of a few feet would be sufficient, and reduce the likelihood of the   
   receiver getting blocked. There's also the question of criminals nearby   
   intercepting your fob signal, recording it and using it to open your car   
   the moment your back is turned.   
   --   
   Ian   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)