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Budget and Entry Level Transceivers - For discussion of budget or entry level radios such as Baofeng, Wouxun, Puxing and other radio communications designated as commercial but not targeted for Amateur or GMRS. Also included are MURS and ISM 900MHz designed radios.

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Old 05-09-2018, 3:34 PM
Join Date: Jun 2014
Location: Boyertown, PA
Posts: 8
Default Radioddity gd-77 DMR

Hey guys,

So working on setting up a DMR radio for my dad and i have been around the block many years of the analog ham radio stuff since i was a kid. However i recently got the above named radio and programmed it to how it should be and all i get is a "connect fail" with multiple repeaters. When i research the repeaters on the site the grid shows im well within range of the actual repeater. Any ideas? Thanks!
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Old 05-09-2018, 9:47 PM
chief21's Avatar
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Location: Summer - western NC mountains; Winter - central FL gulf coast
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I'm not familiar with the GD-77, but all DMR radios are programmed in a similar manner. At a minimum, the frequencies (both TX and RX), color code, time slot and talkgroup must be correct. In addition, there are various other digital settings which could prevent the rig from transmitting.

If you believe that your programming is correct, it is possible that you might not be close enough to the repeater(s). It might be worth a short trip to the immediate area of a repeater to see if the radio works there.

If you're not confident in your programming, there are lots of DMR-related web sites and youtube videos to get you up to speed. DMR is quite different from analog!
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Old 05-09-2018, 11:47 PM
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Default GD 77

Hello, I just got ,my first DMR radio a few days ago, the GD 77. The Radioddity facebook page has a large amount of information. I did not experience your particular error, but I had enough of my own, Research, Research and more BUT its a lot of fun. Good luck Joe
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Old 05-16-2018, 8:37 AM
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Location: Lincoln Park NJ
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Hi All,

I am having the same problem, I have followed all the instructions to programming the GD-77. Watched several tutorials to make sure I was doing the right thing. Yet whenever I try to transmit, I receive "Connect Fail". Any thoughts? Confirmed all the TS, Freq., Color Codes are correct. Thanks.
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Old 05-16-2018, 2:51 PM
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Join Date: May 2007
Location: Conroe, TX
Posts: 250

I don't personally own one, but I heard that the GD77 HAS to have the rx groups filled in for each channel/talkgroup to work properly.
Try that
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Old 05-16-2018, 3:30 PM
Join Date: May 2003
Location: Tampa Area
Posts: 27

I have this radio check to see in the software if you have received only checked I do believe that it does say failure if it's in receive mode only
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