Search found 28 matches

by DG1YFX
Wed Apr 01, 2020 8:23 am
Forum: General discussions
Topic: opengd77 problem with external microphone
Replies: 10
Views: 469

Re: opengd77 problem with external microphone

I have the same problem, but with the internal microphone as well. But it happens not often. After a few seconds it stops transmitting. The other end hears a noise, somewhat like a roger beep. The LED turns to yellow /orange, i.e. both LEDs are on. And it is on receive. I'm using the GD-77 with a DV...
by DG1YFX
Fri Mar 27, 2020 5:29 pm
Forum: Bug reports
Topic: PTT weirdness (and Mobilinkd TNC2)
Replies: 16
Views: 427

Re: PTT weirdness (and Mobilinkd TNC2)

It looks like there is a difference between the Kenwood and the Radioddity plug.

As I've got a Kenwood microphone, I have both plugs here.
Radioddity:
radioddity.jpg
radioddity.jpg (15.65 KiB) Viewed 98 times
Kenwood:
kenwood.jpg
kenwood.jpg (14.9 KiB) Viewed 98 times
There is a difference in the 2,5mm plug which could be the culprit.

73s,
Jens
by DG1YFX
Wed Mar 25, 2020 9:07 am
Forum: Bug reports
Topic: PTT weirdness (and Mobilinkd TNC2)
Replies: 16
Views: 427

Re: PTT weirdness (and Mobilinkd TNC2)

https://www.mouser.de/datasheet/2/427/sia914adj-1764433.pdf There may be a fault with the TNC2. Is the double MOSFET soldered in the wrong way round? To test if the TNC2 circuit works, connect a LED and 1k resistor in series to +5V on the TNC board to PTT. When TNC2 is transmitting, the LED should b...
by DG1YFX
Tue Mar 24, 2020 10:16 am
Forum: Bug reports
Topic: PTT weirdness (and Mobilinkd TNC2)
Replies: 16
Views: 427

Re: PTT weirdness (and Mobilinkd TNC2)

In addition to my last post, this should be the correct wiring from TNC2 to GD-77 after consulting the schematics of the TNC2: http://www.mobilinkd.com/wp-content/files/MobilinkdTNC2.pdf TNC2 has a 3,5mm Socket with two (!) rings. TNC2 shield => GD77 2,5mm shield (GND) TNC2 ring 2 (next to shield) =...
by DG1YFX
Tue Mar 24, 2020 10:01 am
Forum: Bug reports
Topic: PTT weirdness (and Mobilinkd TNC2)
Replies: 16
Views: 427

Re: PTT weirdness (and Mobilinkd TNC2)

Sounds like a ground issue with the pinout. Here it the correct pinout of the GD-77 connector: 3,5mm Shield = PTT Ring = Mike Tip = USB Data (white) 2,5mm Shield = GND (Mike, Speaker, PTT, USB) Ring = USB Data (green) Tip = Speaker So, check the connections on the TNC2 if this corresponds with the p...
by DG1YFX
Tue Feb 25, 2020 9:01 pm
Forum: Developer discussions
Topic: serial data with internal mic and speaker
Replies: 15
Views: 798

Re: serial data with internal mic and speaker

I bought some cheap stereo 3,5mm plus 2,5mm plugs and sockets to connect the lot. Plus a USB-Micro socket. This is a far better idea instead of slaugtering an original cable with lacks all connections anyway. This tool keeps me from unplugging anything for updating firmware or cps. Debugging or remo...
by DG1YFX
Tue Feb 25, 2020 3:26 pm
Forum: Developer discussions
Topic: serial data with internal mic and speaker
Replies: 15
Views: 798

Re: serial data with internal mic and speaker

Well, external mike and speaker plus USB simultaneously is possible. I use it for months without problems. Since there are so many different pinouts you will find in the net, here is my version 3,5mm Shield = PTT Ring = Mike Tip = USB Data (white) 2,5mm Shield = GND (Mike, Speaker, PTT, USB) Ring = ...
by DG1YFX
Sun Feb 16, 2020 4:20 pm
Forum: Development updates
Topic: Update 16th Feb
Replies: 34
Views: 1900

Re: Update 16th Feb

Yeah, noise problem has gone. But I still don't have the guts to put the firmware onto my GD77 hotspot. :lol:

73s,
Jens
by DG1YFX
Sat Feb 15, 2020 11:40 pm
Forum: Development updates
Topic: Update 15th Feb
Replies: 24
Views: 1050

Re: Update 15th Feb

Yes, some weird noises. And in Hotspot mode sometimes it will not receive or transmit. Reverted back to the last version.

73s,
Jens
by DG1YFX
Wed Jan 29, 2020 11:03 pm
Forum: Off topic
Topic: Modification of the Radioditty charger with "TP5100" card at $ 2.
Replies: 37
Views: 1440

Re: Modification of the Radioditty charger with "TP5100" card at $ 2.

A week? You lucky devil. :lol: As I order in China direct it takes about 4 weeks. But then it is 2$ for 4 of them. It took me some time to realize why these things were so delicate to handle. When I switched off the power supply and switched it on again, no problem. But when I pulled the plug direct...