Search found 919 matches

by G4EML
Tue Jul 11, 2023 2:51 pm
Forum: GD-77 / DM-1801 / RD-5R / GD-77S
Topic: GD-77 Please help - Radio hangs permanently
Replies: 16
Views: 3041

Re: GD-77 Please help - Radio hangs permanently

I missed that part of the post. If you are talking about the official firmware then the answer regarding safe power on is irrelevant.

We can't really help much with the official firmware.

Colin G4EML.
by G4EML
Tue Jul 11, 2023 1:09 pm
Forum: GD-77 / DM-1801 / RD-5R / GD-77S
Topic: GD-77 Please help - Radio hangs permanently
Replies: 16
Views: 3041

Re: GD-77 Please help - Radio hangs permanently

The safe power on option may be set. This prevents the radio from being accidentally turned on. Hold SK1 while powering on in this condition. You can then change the Safe Power On option in the general options menu. Personally I think this option is more trouble than it is worth but I guess someone ...
by G4EML
Mon Jul 10, 2023 6:08 pm
Forum: TYT MD-UV380/390 / UV380/390 Plus 10W / Retevis RT-3S / Baofeng DM-1701 / DM-1701B / Retevis RT-84
Topic: RT3S
Replies: 7
Views: 3260

Re: RT3S

Please carefully re-read the installation instructions.

You must have a copy of the donor firmware available on your PC. Download it from here

https://www.passion-radio.com/index.php ... chment=760

It only needs to be on your PC ,do not try to load it into the radio.
by G4EML
Sun Jul 09, 2023 5:40 pm
Forum: Baofeng DM-1701 / Retevis RT-84 specific
Topic: 1701 Timeout on pressing the PTT
Replies: 39
Views: 8492

Re: 1701 Timeout on pressing the PTT

When you attempt to transmit to a repeater that is idle the radio sends a brief 'wakeup' burst and then listens for the repeater. If this fails it tries again a couple of times and then gives up and displays the timeout message. So, if you are seeing timeout it means that either the repeater is not ...
by G4EML
Thu Jul 06, 2023 9:12 pm
Forum: TYT MD-9600 / Retevis RT-90
Topic: Display flip when keying
Replies: 7
Views: 1241

Re: Display flip when keying

Remove and reseat both ends of the ribbon cable between the radio and the display. These are known to go intermittent sometimes. Also make sure your antenna is well away from the radio, RF feedback can do strange things. Make sure your power supply is man enough, the radio can take up to 10 Amps on ...
by G4EML
Thu Jul 06, 2023 8:57 am
Forum: TYT MD-9600 / Retevis RT-90
Topic: MD-9600 Microphone Number Entry - Mixed
Replies: 5
Views: 2669

Re: MD-9600 Microphone Number Entry - Mixed

I have seen a similar problem in the past. It turned out to be a badly crimped microphone connector which had high resistance on one of the button signals. Wiggling the cable and connector would change the fault. As Roger said the microphone switches different resistors to ground to indicate the row...
by G4EML
Mon Jul 03, 2023 11:04 pm
Forum: General discussions
Topic: Spurious emissions
Replies: 12
Views: 3612

Re: Spurious emissions

I don't know if anyone has recorded the results of any tests. The performance will be the same with openGD77 as it is with the official firmware. The filtering is fixed in hardware so the firmware can have no effect. We do know that the experimental 220MHz support on the GD77 has a very poor output ...
by G4EML
Mon Jul 03, 2023 10:58 pm
Forum: TYT MD-9600 / Retevis RT-90
Topic: How to adjust output power
Replies: 5
Views: 1426

Re: How to adjust output power

This is a limitation of the microphone hardware. It is not possible to detect two keys pressed at the same time. Hence we had to use 'long press D and release' to toggle the shift function.

Colin G4EML
by G4EML
Mon Jul 03, 2023 9:57 am
Forum: Baofeng DM-1701 / Retevis RT-84 specific
Topic: Any method mapping origin firmware calibration data to opengd77
Replies: 8
Views: 1344

Re: Any method mapping origin firmware calibration data to opengd77

The original calibration data is already used by OpenGD77 so what you suggest has already been done automatically.
by G4EML
Sun Jul 02, 2023 10:43 pm
Forum: General discussions
Topic: Digital simplex and private calls.
Replies: 8
Views: 1755

Re: Digital simplex and private calls.

With the latest firmware release private call reception is now consistent with the DMR filter setting.

With DMR filter turned OFF you will hear all private calls.
With DMR filter set to TG or TGL you will only hear private calls addressed to your ID.

Colin G4EML