STM32-dvm RepeaterBuilder No audio on RX,

Help with other MMDVM Repeater Boards (with NO onboard RF)
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VA2DG
Posts: 7
Joined: Tue Dec 25, 2018 4:17 pm
Location: Montreal South Shore

STM32-dvm RepeaterBuilder No audio on RX,

Post by VA2DG »

Hi everyone,
i am building a DMR Repeater with 2 CMD1550LS, and a Repeater builder STM32-dvm V3.

No Audio is repeated when a signal is received on RF. But network activity the audio will be transmitted OK.

Repeater TX is excellent when putting TG91 static and i can receive everything on my MD380.

But when i transmit on TG302233 with my MD380, Repeater is receiving signal and i see a line in the Live log and TX goes on and i see myself on the local Pi-Star dashboard or any other Pi-Star dashboard that is monitoring my TG302233

When listening on my XPR4580 (900) on TG302233 i do receive signal and the DMR ID but no audio is heard.
Transmitting with my XPR4580 on 900 Repeater i do received my audio on my MD380 thru the Repeater i am building.

On thing i dont have duplexer yet but TX is in a dummy load and RX with in dummy load

Could it be an issue with the STM32 board?

Running Pi-Star:4.1.4 / Dashboard: 20210224

Any input or suggestion for testing is welcome.
73's
Daniel VA2DG
g7kbr
Posts: 70
Joined: Thu Nov 01, 2018 1:03 pm

Re: STM32-dvm RepeaterBuilder No audio on RX,

Post by g7kbr »

Silly question, but have you set the board up as per the instructions? Sounds like your levels are wrong. H


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VA2DG
Posts: 7
Joined: Tue Dec 25, 2018 4:17 pm
Location: Montreal South Shore

Re: STM32-dvm RepeaterBuilder No audio on RX,

Post by VA2DG »

Well just found the issue
i was using a MD380 VHF that i never used and today i decided to use my Kydera CDr300UV and on my first try on the parrot and got the answer with my voice.
So i took the MD380 and when to 146.52 and surprise no audio on transmit but the DTMF are going thru, Try with a external Mic and working.
So probably the Mic cartridge is dead.
3 Day lost trying with this faulty radio.

Case is closed now.
Thanks for your inputs
73's
Daniel VA2DG
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