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Author Topic: Solar-Powered BRS On-Air on 13556.9 From SF East Bay  (Read 272 times)

Offline AA7EE

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Solar-Powered BRS On-Air on 13556.9 From SF East Bay
« on: January 06, 2019, 1936 UTC »
I built this little beacon back in May of last year, but only just got around to mounting it permanently outside. It is powered by a small solar panel, with no battery. As a result, it operates during daylight hours only, coming on 30 minutes to an hour after sunrise, and going off-air 30-45 mins before local sunset. It works on bright and moderately bright cloudy days, but does struggle a bit when the clouds are particularly thick and dark. I've thought about adding another panel or even a battery but, for the time being, am considering the slightly quirkiness of it's operating hours as part of it's charm.

It sends the letter "BRS" at 10wpm, in honor of my neighbor's cat Boris. Power is a stunning 1mW to a half-wave dipole in a slightly bent configuration on a second floor balcony. With such low power and a compromise antenna, I'll be amazed if anyone hears it. The plan is to run it at 10wpm for a few months then, if it has not been heard, to change to QRSS.

The frequency is a nominal 13556.9 KHz, which varies up and down by a few 10's of Hz, depending on the ambient outside temperature.

I hope it's OK to post this link. There's some more info, and pics, here -

https://aa7ee.wordpress.com/2019/01/03/putting-the-hifer-brs-boris-beacon-on-the-air-finally/
Oakland, CA
(SF Bay Area)

Offline ChrisSmolinski

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Re: Solar-Powered BRS On-Air on 13556.9 From SF East Bay
« Reply #1 on: January 06, 2019, 2051 UTC »
Thanks for the info, I look forward to hearing your beacon one day!
Chris Smolinski
Westminster, MD
eQSLs appreciated! csmolinski@blackcatsystems.com
NRD 545 / netSDR / AFE822x / AirSpy HF+ / KiwiSDR / 670 ft horizontal loop / 500 ft northeast beverage / 58 ft T2FD / 300 ft south beverage / 43m / 20m / 10m  dipoles / Crossed Parallel Loop