[aprssig] Golden Packet Event 15 July 2017 (out west too?)

Scott Miller scott at opentrac.org
Tue Jan 24 14:01:35 CST 2017


Years ago I sketched out a protocol for differential pulse position 
modulation to send telemetry via a xenon strobe.  I never got around to 
testing what kind of timing accuracy I could get out of it.  I thought 
the scheme was kind of clever, and then I realized that Aeneas of 
Stymphalus had described an optical pulse position communication system 
around 350 BC.

Scott
N1VG

On 1/24/2017 10:45 AM, Stephen H. Smith wrote:
> On 1/24/2017 12:50 PM, Robert Bruninga wrote:
>>
>> CONVERSLY BACK EAST we have never found any east-coast OT scout 
>> operations.  Maybe the les reliable sun and the tree covered 
>> mountains make long distance optical comms too difficult.  But if the 
>> HAMS on the Golden Packet carried along a bright car headlamp, I bet 
>> we could send flashing light to scouts out to 50 mile east coast ranges.
>>
>> Bob, Wb4APR
>>
>
> Forget about car headlamps and clumsy exteernal batteries!   One of 
> these high-power LED flashlights would do the job.  This heavy-duty 
> aluminum-and-rubber-barreled device runs on 3 "C" batteries, and has a 
> push-pull zoom head with an actual curved lens in it. (i.e. not just 
> moving the reflector as many zoomable flashlights do.)  It can zoom 
> the 700 lumen LED beam from a very broad (approx 90-degrees) diffuse 
> spread down to a spot beam of less than 10 degrees.
>
> Pack of two of these Duracell flashlights (including 6 C-size 
> Duracells!) is $16 at Costco.
>
> [Not sure if the inserted image below will make it through the TAPR 
> remailer]
>
>
> _____________________________________________________________
>
>
> Stephen H. Smith    wa8lmf (at) aol.com
> Skype:        WA8LMF
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>
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