OpenGD77

Daniel, I haven’t had chance to check the code but your description seems the wrong way of doing things. If someone calibrates his battery display to read accurate battery voltage it should not also change the thresholds. The thresholds should remain fixed at the original values. Otherwise by adjust...

As far as we know there is no way to increase the microphone gain any more than is currently available. The only remaining option would be a hardware modification.

Colin.

No it is not possible to backup the flash with the original firmware loaded. As you have found the original firmware does not appear as a com port. This is normal, openGD77 uses different drivers. However loading OpenGD77 does not change any of the calibration or flash settings so a backup immediate...

There is a simplex mode that does use timeslots. It is called dual capacity direct mode. Many radios do support this including the original GD77 firmware. However it is not available in the openGD77 firmware. DCDM is used by commercial users to get two conversations on one channel because each chann...

Yes, timeslot is only important when you are using a repeater.

Colin.

It’s difficult to understand your question but I think you are asking about timeslots and simplex operation between radios. When operating simplex (direct mode) between radios the timeslot is not relevant. Timeslot filtering and timeslot selection will have no effect, this is normal. OpenGD77 does n...

JA is Japanese. The firmware is the same, just the language is different.

Changes to settings are permanently saved by pressing SK2 + Green. If you are pressing the Green key on its own then the change is only temporary.

There is a deliberate delay applied to the CTCSS decoder which can result in hearing short squelch tails. This is because the decoder in the radio suffers from intermittent CTCSS dropouts with weak signals. Some users complained about the signal breaking up when using CTCSS, so this delay was added....

Yes it does. Talkgroup, timeslot and colour code filtering can all be turned on and off. Note that colour code filtering is normally used as part of the valid signal detection. Turning it off will allow any signal to be received but it may also cause spurious noises to be heard. It is recommended no...