A Walk Thru OpenGD77 and the GD-77 Radio
ฝัง
- เผยแพร่เมื่อ 11 ก.พ. 2025
- DMR is Hard. The OpenGD77 strives to make it easier and more fun at the same time. Let's take a walk through the radio from a first person perspective and see what it looks like.
More Info:
👉 OpenGD77 Project: opengd77.com
👉 OpenGD77 User Guide: github.com/Lib...
👉 How to Flash OpenGD77: www.opengd77.c...
👉 Radioddity GD77 Radio Info (discontinued): www.radioddity...
👉 Maybe find one on ebay?: geni.us/uNyh
👉 Surecom SW102 Meter: geni.us/IAKUo
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👉 👉 That's where the SMA wrench came from!
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Great radio, got one just before they were discontinued just so I could load Open GD77. Of note, Open GD77 runs on most of the recent TYT HTs, and works extremely well. The interface is hands down better than what a TYT ships with.
DMR is so hard! I'm glad OpenGD77 exists to bring it some much needed LIFE!
Great vid Steve, I love my GD-77. It's definitely replaced my 'feng. I'm glad to see the are pure on the spectrum. OpenGD does have it's quirks but overall it's run good for me. I haven't updated it in ages, your video has served as a reminder to do so. It's now on the agenda for tomorrow. 73
Good Luck Dusty!
Great rundown, thank you. A friend gave me a TYT MD-UV390, hoping to chat over DMR. I never used hotspots for 30 years, and, somehow, two died in two months. The radio is useless from the front panel, so I really like your requirement that it work without requiring software. I should swap out the firmware so the radio actually serves a purpose. Thanks again for the rundown. I'm off to learn more about OpenGD77 and what makes it special.
I hope the OpenGD77 team keeps plugging away at it. I see a lot of potential in having a radio firmware that is made by hams for hams.
That's a nice radio. It is the same one I have for DMR. I don't use it outside the house, but there's not really DMR repeaters around anyway. I probably need to upgrade the firmware since it's been a couple years, but OpenGD-77 is great. Thanks for another informative video. DMR is a PITA (that's just my opinion).
DMR is a PITA
In addition to the GD-77 I got me a Retevis RT-90, a VHF/UHF/DMR 50W mobile radio, which is still available. I also installed Open-GD77 onto it, and am using it not in the car, but in the shack with a Diamond X510N antenna.
It is nice to have the same firmware on two different radios.
Standards!
Makes a great hotspot by itself.
How can it do that with no Internet connection?
@@temporarilyoffline You need to hook it up to a computer or pi. It's like a USB MMDVM
@@ronwolenski-n8wcr ok, that makes sense
Another great video TO! 🎉
Good to see you!
The GD-77 is one of the best HT radios I've ever owned. It's taken a few spills to the concrete and stayed intact and functioning, some radios couldn't do that. I really wish Radioddity wouldn't have discontinued it for the GD-88, but it is what it is. For satellite use, you put in your 6 character grid square and it'll do the rest after that. For the OpenGD-77 firmware, its a huge upgrade to an already great radio. You lose the encryption ability it originally comes with, but you gain so much more that its not really worth mentioning.
Yeah, she was a tank!
Nice looking radio, great review, tnx Man!
It was a brick... Too bad it's retired
great job on that radio. That is common for a watt meter to do that threw a antenna. it is adding forward to reflected power . And that meter is calibrated into a dummy load. The best meters for that are the directional wattmeters. Cost a bunch more but give accurate reading of forward and reflected power. I got one for HF I use all the time. It is a cross needle one. SWR meter is just a ratio. They great for showing when you heat a toroide up. The reflected watts creep up then rich a point and lots of reflect. There's a warning sign before the reflect goes crazy . 73
Totally agree. The surecom meter has a FWD and REV power reading at the bottom of the display. Lots of stuff in that little box.
I have both the gd77 and the retevis rt3s.. Both horrible radios with stock firmware but with opengd77 they are honestly some of my favorite handhelds, and my go-to for sat operation.
I'll be attempting some sat work in the next OpenGD77 vid. I ASSumed it needed GPS to work properly.
Awesome! looking forward to that !
Steve I have the Boofwang version of that radio(1701) and it works great on Open GD. If you get a chance to grab one of those they will go down to .2 watts which is great for at home use with a hotspot. Upside is the 1701 has a color screen and is pretty easy to program from the front panel.
I saw that color screen... I'm digging it!
You can go over the max power of 5W if you hold down the blue button and long-press > instead of tapping it. Probably best only use that in an emergency.
Good tip! Yeah, I can imagine that would drain the battery fast and might even hurt something inside the radio from all the heat.
Hey there, I recently downloaded the open software and I have a radioddity 77 and I’m using a cable that came with my TYTUV 8000 D and I can’t get the computer to recognize my radioddity 77 radio it says no device found I wonder if it’s my cable or if it’s a driver I need to install and where would I install that driver I wonder
Does your computer see the cable at all or just not the radio? If Device Manager doesn't see the cable as a Serial Port or COM port, check the instructions here: How to install programming drivers on windows: learn.adafruit.com/adafruits-raspberry-pi-lesson-5-using-a-console-cable/software-installation-windows
@ thank you and my computer sees it as a serial port but it always says no radio detected
@@joshhayes9570 That's good new - there is a 75% chance that windows is happy now. Next up the cable needs to be pretty firmly pressed into the radio, so if you're not all the way home, that's the next solution. Are you trying to do codeplug work or trying to install the OpenGD77 firmware?
You can manually set your location for the Sat. mode.
Thanks!
Sorry about all the antennas. I am not even sure I knew all those were in there. 😂
Zero complaints, thanks for letting me take it for a spin!
The satellite support in opengd77 firmware is unique as far as I know. Doppler, sat tracking, VU, UV, etc. The firmware works on 5 other radios as well - I have it on my RD5R. SOO much friendlier to use than the standard firmware.
Agree that it is easier to program using the CPS.
73 Ed.
I need to find a radio with GPS and play with the sat tracking features. Would be good to have a non-windows CPS while I'm wishing!
@@temporarilyoffline Any Tone 878 UVIII has GPS and Satellite tracking in latest firmware update. Unfortunately, Windows only (I have begged for a Mac version)..
@@temporarilyoffline the sat tracking feature does not need GPS. It's nice when the radio has GPS but you can enter your location manually. Ed
@@DD5LP Excellent! I have another radio to run GD77 on coming up soon.
How did you know there is no APRS on the repeater?
Hey Mason, I'm not sure I understand your question?
were was the mic gain?
I didn't see it either 😇
THe only thing I miss with the Open GD is the inability to send messages. They could not reverse engineer that.
I hear ya. As an old skool dev, makes me wonder if its something in the protocol spec they haven't gotten to yet/see no value in/etc or if its out ROM space in the radio. These radios have near zero memory being old tech relics really... from back in the days when memory was very expensive compared to today.
I just sold this radio and this is another video of that reminds me of why I’m a dummy for selling it.
I'm here to help Mike!
Never a live moment 🎃👋 ha ha 👋🎃
Monday nights bro!
Got the Retevis and TYT versions of this radio but I can't get either one to consistently talk to a computer for programming. The GD77 advice to just try other USB ports hasn't helped. Five PCs, one of them should work. Nope. I can't even just give up and sell them because I can't promise anyone else that they will work.
I wish they were supported by Linux - I can do the firmware load under linux, but can't edit the codeplug there. Are you on Windows 11 on any of them? Win11 has a TON of problems with chinese radio USB cables.
I've swapped the firmware in most GD77 radios that have found their way to my bench. The stock firmware is awful and not worth investing time, however once you start using OpenGD77 you'll never go back to stock!
Hey Scott! I think anytime a person actually uses a radio, they'll see how to fix the interface right up!
@@temporarilyoffline FYI to adjust the power, hold the blue side button and then use the left/right arrow keys 👍
FIRST!!!!
🤘