A High Powered DMR Hotspot project with the STM32 DVM Board

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What do you do when your area doesn't have a DMR repeater. Well, you make plans to build your own.
In this video, I show a stepping stone on the path to a full DMR repeater. This is a DMR high-powered
hotspot using the STM32 MMDVM board from repeater builder.
www.repeater-bu...
A good source of information for building a MMDVM repeater is this blog post by N5AMD.
n5amd.com/digi...
Support me on Patreon.
/ bobplank
Follow my adventures on Twitter and Instagram.
@73outdoors
You can also check out my webpage.
www.KK4DIV.com
Music credits:
The Beacon by Zachariah Hickman
Acoustic Guitar by Audionautix
Acoustic Guitar 1 by Audionautix is licensed under a Creative Commons Attribution 4.0 license.
creativecommon...
Artist: audionautix.com/
Camera equipment:
GoPro Hero 8 Black (while adventuring or outdoors)
Canon Vixia HF R800 and Logitech C922 HD webcam (in the studio)
Editing software:
Corel Videostudio Ultimate 2021
My favorite radio equipment for outdoor portable ops or RaDAR:
Radio: Icom IC-705
Tuner: Elecraft T1 tuner
Antennas: Chameleon F-Loop magnetic loop antenna (does not need a tuner)
End fed antenna with 9:1 unun (needs tuner)
Sotabeams Bandhopper 20/30/40 linked dipole
Digital software: FLDigi and WSJT-x

Опубликовано:

16 сен 2024

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Комментарии : 19

@frankb6333 Год назад

Those MMDVM boards are fun. Two tips for those reading this...first, Amazon sells DB9 serial cables very cheap--get one and cut an end off and you'll have all nine wires and they're stranded. Second, raise that mobile off the hot power supply and add two muffin fans (4" will work) side by side blowing from the back towards the front...you mentioned heat--whenever your handheld is receiving, your mobile is transmitted and it'll easily go over the duty cycle and overheat the mobile. Get it cooled and you can do high power...although antenna altitude would help more (and quality feedline). Love the options...DMR, D-Star, YSF, & P25. You can even add an OLED screen or Nextion screen to "see" what's going on. The only difference between this and a repeater is you may not always here someone that's local transmitting into your MMDVM because it's not being amplified and re-transmitted. Remember the most important rule of linked radios--NEVER tailgate...always leave space between parts of QSOs so others can unlink their radios (you can't unlink when it's transmitting, you have to wait for the rude operators to shut up so you can send an unlink command).

@alvarogaitan2529 9 месяцев назад

great project congratulations thanks 73 from kb2uew

@n1kkri Год назад

I put together one of those. I bought a board at a Ham Convention and connected it to my Rasperry Pi and a Yaesu 2/440 rig. In fact the radio was a 8900. It did work but al little tricky getting the tiny trimmer pots set right. It's been several years since I used it. It's the same company you got yours from.

@kg5nub 11 месяцев назад

Whats the setting for setting an ft8800 for like allstar?

@gervaisfillion9417 4 месяца назад

@@kg5nub i sent 2-3 questions about that too here,,,,,,,,,,never add an answer !!i wonder if the gentleman still with us!!!

@luish19779 5 месяцев назад

NICE...KE2AUM.I AM WORKING IN SOMETHING LIKE THIS...

@PowderMill 5 дней назад

You’ll be putting the $$ very affordable 🤨 Motorola Super Max Capacity IP Linked repeater systems… OUT OF BUSINESS soon enough. LOL Seriously, that’d be a neat concept for linking up local scouting groups located in areas w/limits power and connectivity l Thanks

@daltonkatiehall1888 7 месяцев назад

Just curious but what is the little thing in the usb port of your board? Looks like a wireless mouse plug but was just wondering. KK4LBX

@steveb3885 9 месяцев назад

At that power and coverage, this would need frequency coordination from FASMA. This is not a hotspot and would be legally a DMR repeater. Hotspots are short ranged, less than 1 watt devices.

@gervaisfillion9417 9 месяцев назад

i remember in the FT1500 setup choices,,thee was something about PACKET or 9600 to be activated,,,,anyone had this issues?? i need some support guys thanks for the video,

@kurthill2101 2 месяца назад

Does connect to wifi

@Muppet911 Год назад

Good job. Any special adjustments to the radio?

@BobPlank_KK4DIV Год назад

No adjustments. The only adjustments I needed were some minor tweaking on the DVM board itself . There are adjustment pots for RX/TX levels.

@Jacob-mm8xq Год назад

What is your living environment, trying to setup a repeater in a mostly urban area just curious if it will work well

@BobPlank_KK4DIV Год назад

I live in a suburban area. If you are in an urban environment with high buildings, you may have problems unless you can get your repeater antenna on top of a building.

@gervaisfillion9417 9 месяцев назад

i wonder if the Data is Universal ,,like on my FT1500M yeasu ? i need a cable and i cannot weld anymore,shaky hands. i have a Pi2 left over here,i would buy Scott STM32 now. someone is selling my cable?? 73 from Quebec. Gervais,ve2ckn