[aprssig] APRN news from Dayton!

Scott Miller scott at opentrac.org
Wed May 25 16:52:24 EDT 2011

There's one on the wiki from the old camera module.  The composition is 
lousy and the lighting is less than ideal, but I haven't had a chance to 
post anything else.



On 5/25/2011 7:47 AM, Andrew Rich wrote:
> Does anyone have example images ?
> Sent from my iPhone
> Andrew Rich
> On 26/05/2011, at 0:35, "Bob Bruninga"<bruninga at usna.edu>  wrote:
>>  Traffic Cams:
>>  One use of these SSTV cameras might be on telephone poles along one's
>>  commute at the critical traffic points.  A driver can key up a PL tone and
>>  the next camera in range will send its view on some UHF channel to be
>>  displayed on a laptop running any SSTV soundcard software.
>>  The entire control system and RF hardware would cost only about $15 if it
>>  were not for the prohibition against tones (longer than 10 seconds) on the
>>  FRS channels.  I love the little COBRA CXT90's that have both CTCSS and DCS
>>  and can not only scan the channels but also the CTCSS and DCS to find who is
>>  on what tones.  They also have VOX and cost less than $15 each in pairs.
>>  The one problem is that I have not found a reliable DC point somewhere
>>  inside the radio that changes TTL level when it decodes a tone.  Actually,
>>  it is easy to find many such points, but as soon as the radio goes into
>>  power-saver mode and starts pulsing the receiver, every point in the radio
>>  starts pulsing too.  So the easiest thing to do would be to simply use an
>>  external VOX circuit on the speaker output to key the SSTV camera, and then
>>  it's noise would key the radio's VOX for the transmission.
>>  A press of the obnoxious CALL button in the mobile would start the process.
>>  Too bad the FCC prohibits tones (the SSTV) longer than 10 seconds on FRS...
>>  Bob, WB4APR
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