OpenGD77

The RT3S is an MDUV380 with different stickers on it. The hardware is identical, so there is only one version of the firmware.

The MD9600 has no software controllable LED indicators.

The Microphone LED is directly controlled by the PTT switch.

Colin G4EML

Yes.

The clone chips are unmarked. At the moment we have not heard of any in MD9600 radios.

As one of the developers I appreciate what you are saying. However my main concern would be that by publicly accepting a donated radio I would feel under a very strong obligation to get it working. That may turn out to be much more work than I am willing to do. As Roger has said the issue lies somew...

Numeric keys on Mic.

A/B key to enter

When Entering Lat/Long use the Up/Down to select N or S
Long press D then Up/Down to switch E or W

Colin G4EML

As Roger said, if your radio returns REV: 0x9 then it will not at the moment work with OpenGD77. None of the developers has one of these radios, so it is almost impossible to develop a fix. Just for completeness My RT3S returns REV: 0x100F which is different to Rogers but still works OK. My MD390 re...

We don't know what the cut-off for serial numbers is but it would appear that anything
starting 2211 and after may have the problem.

Colin G4EML

The GD77 uses AFT05MS004NT1 FETs in both the VHF and the UHF PA stages. Only the tuning components are different. The same device would almost certainly work in the DM1801.

They are easily available from Farnell/Newark or Mouser.


Colin G4EML

Please can you post the first part of the serial number of the radio that would not work.
The firmware certainly works on my RT3S Non-GPS radio with a serial number starting 2201.

Colin G4EML

In your original posting you said that the serial numbers started with 2105 which would indicate a manufacture date of 2021. You also mention a sticker with the later date 0f 2022 12. Where is that?. I am wondering if the radios are actually old stock which has been re-worked or updated in some way....