HFU HF Underground

Technical Topics => The RF Workbench => Topic started by: Quinta on October 09, 2021, 1242 UTC

Title: 4096 beacon goes wild soon :)
Post by: Quinta on October 09, 2021, 1242 UTC
(https://sun9-78.userapi.com/impf/M2eZaW10k5aJEabqpvncOtr15jmVT7goK8nsKA/bubpIb5-C94.jpg?size=1200x1600&quality=96&sign=50db86e393a896a3b62baaf3f7d21a90&type=album)

(https://sun9-83.userapi.com/impf/1Yo6XI0pBCXzDQWs1c4XC1I3BHqsYlCku6SCHw/IqnpLqtcv7A.jpg?size=1200x1600&quality=96&sign=2a83a9aef242cf0fe686f67c6f21911e&type=album)

(https://sun9-84.userapi.com/impf/GU1b0ox5CzYXoYr2JTT6xw70PQOpyrWA2fBqow/J_Qbno15J50.jpg?size=1600x1200&quality=96&sign=b587618814a1bcaaad082ec3c10a53db&type=album)

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.
Title: Re: 4096 beacon goes wild soon :)
Post by: ChrisSmolinski on October 09, 2021, 1353 UTC
Looks great! Can't wait to try and hear it  :)
Title: Re: 4096 beacon goes wild soon :)
Post by: 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.
Title: Re: 4096 beacon goes wild soon :)
Post by: ChrisSmolinski on October 09, 2021, 2224 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.

I'm still going to try to hear it here in the USA, I like DX challenges  ;D
Title: Re: 4096 beacon goes wild soon :)
Post by: Quinta on October 10, 2021, 0925 UTC
I can install dipole from notrh to south. But not very high, 10-15 meters above ground, on the trees.
Title: Re: 4096 beacon goes wild soon :)
Post by: redhat on October 12, 2021, 1453 UTC
Looks great and good luck.  Спасибо!

+-RH
Title: Re: 4096 beacon goes wild soon :)
Post by: Quinta on October 15, 2021, 1751 UTC
I roll in the forest today between 13.00 and 19.10, trying to find thick pine with a clearing on the south, for lighting solar battery.
But lost in this game. Also in ths road a lot of people. I know one more appropriate place, tomorrow i will go there. https://wikimapia.org/#lang=ru&lat=59.787507&lon=31.245375&z=14&m=w
Now i charging acid of beacon from PSU.
I translate comments in beacon sketch to english, and download sketch to pastebin
https://pastebin.com/3C7amLMy

Some photos "Meanwhile in the forest"
(https://sun9-67.userapi.com/impf/iwOIkj09WT5DqV78IjdHI5Hc8leTMqffznuLlQ/-Nc5fQeMnzU.jpg?size=1200x1600&quality=96&sign=d87ab3f43085065f5618cb83621afc3f&type=album)

(https://sun9-60.userapi.com/impf/E1rPNDI3X4h96OBNp0w7_fF4jgoOgzDJ1Ok_og/9geso1kSyTU.jpg?size=1600x1200&quality=96&sign=58dc3a0a77cf5395665b20b8a8ecad51&type=album)

(https://sun9-38.userapi.com/impf/eAAvHaaUxRuVAHGMKVEz9dPvNHjKOOJu1KJhyw/voJG0XtGdSk.jpg?size=1200x1600&quality=96&sign=2ea4e8ed4003f7a322681c7ae8746800&type=album)

A sign at the site of a village destroyed in ww2, there are 10 of them within a radius of 15 kilometers
(https://sun9-30.userapi.com/impf/XsNFWYcOtOMJwv71dpPA2dpvPtSSo4ch69-nUA/WeEFaBV0zZc.jpg?size=1600x1200&quality=96&sign=bdb5173ca24276702e41a8a2eeb57257&type=album)

Some roads really ancient. 17хх year
(https://sun9-46.userapi.com/impf/Ajk_ne3UR1_sAzhOeJ2kR9fHhDPPtdn0Rg_9Kg/slMjQG3NbX0.jpg?size=2560x1707&quality=96&sign=aa3d06de2014242d35f6d6f8f3643835&type=album)

Title: Re: 4096 beacon goes wild soon :)
Post by: Quinta on October 22, 2021, 1443 UTC
Device installed
https://wikimapia.org/#lang=ru&lat=59.836042&lon=31.330669&z=17
Aaaand... i cannot hear it with my 8 meters random wire. But with ATS-20 and 20cm telescope i can hear it in the forest, 500m far from my home.
https://ibb.co/LnXQwr4
Antenna not tuned, i think i should made block with 2 stretchable tuning coils and install it between device and antenna.
https://ibb.co/g62CVkR