Technical Topics > The RF Workbench

4096 beacon goes wild soon :)

(1/2) > >>

Quinta:






I made my first 4096 beacon :)
Arduino controlled. He checks voltage on PV, on lead-acid, if one of them higher than usable minimum (pv see the sun or acid battery higher than minimum voltage) he  transmit message with voltages, temperature and EMI (little 2 stages hf amplifier with detector) and if pv voltage higher than battery, and battery not fully charged he turns on charging net. Then going to sleep for some 8sec cyles (maximum hibernation legth with lowpower library)
After every hybernation cycle he disconnect PV and acid battery for checking voltages, then, if PV voltage higher than acid, and acid voltage still not 6.7 v (i use 6v 4.5 a/h and 7.4v 0.5a PV) he turns on charging again.
Tx pixie-style, 0.5w output. 125ma current consumption, approx 1minute length transmission, 10wpm, then 10 minutes pause with dits every 8second. Also i remove power led from arduino pro. So it equals approx. 15ma current consumption.
Now i install beacon on the southern wall and test him with 50ohm load.

ChrisSmolinski:
Looks great! Can't wait to try and hear it  :)

Quinta:
He will be placed somewhere here
http://wikimapia.org/m/#lat=59.8349688&lon=31.2394464&z=14&l=1&m=b
So, in north america he can be received only with websdr.
Also i use plastik-71 on pcb, 3 layers. It much better than epoxy.

ChrisSmolinski:

--- Quote from: Quinta on October 09, 2021, 1803 UTC ---He will be placed somewhere here
http://wikimapia.org/m/#lat=59.8349688&lon=31.2394464&z=14&l=1&m=b
So, in north america he can be received only with websdr.
Also i use plastik-71 on pcb, 3 layers. It much better than epoxy.

--- End quote ---

I'm still going to try to hear it here in the USA, I like DX challenges  ;D

Quinta:
I can install dipole from notrh to south. But not very high, 10-15 meters above ground, on the trees.

Navigation

[0] Message Index

[#] Next page

Go to full version