Wind noise on internal microphone

VK3KYY
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Re: Wind noise on internal microphone

Post by VK3KYY » Sun Dec 04, 2022 11:32 pm

Hi Alfred

Its strange that only your radio has this problem.

Although I opened by RT3S, I did not remove the front panel PCB, I only soldered to the main PCB to erase the CPU completely, using a hardware programmer dongle

Perhaps the problem is the casting of the plastic.

It is a common problem on external microphones to only have a very small hole to allow the sound to reach the mic.
I usually modify any external mic to have a larger hole in front of the mic, by using a 5mm or larger drill to remove excess pastic.

Possibly you can try something like that, or perhaps the mic has an electrical fault.

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oe7abh
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Re: Wind noise on internal microphone

Post by oe7abh » Mon Dec 05, 2022 8:07 am

Hi Roger,

the internal microphone had an electrical fault.
I replaced it with another one from the tinkering box.
No more wind noise without modulation. Voice reproduction is good. :D

The included antenna was also very very bad, it is resonant on 560Mhz - so unusable for amateur radio - I had to replace it too. With this antenna the BitError rate in DMR at the hotspot went up to 7%. When I used a good antenna, everything was good again -> BitError rate less than 0,5% ! I did not get a good unit unfortunately. :(

An external microphone has always worked well, no fault here.
In the future I will buy again a radio of the brand "TYT", maybe I have more luck here. 8-)

Greetings from Tyrol, 73 Alfred
http://tyrofly.at/

VK3KYY
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Re: Wind noise on internal microphone

Post by VK3KYY » Mon Dec 05, 2022 8:41 am

oe7abh wrote:
Mon Dec 05, 2022 8:07 am
Hi Roger,

the internal microphone had an electrical fault.
I replaced it with another one from the tinkering box.
No more wind noise without modulation. Voice reproduction is good. :D

The included antenna was also very very bad, it is resonant on 560Mhz - so unusable for amateur radio - I had to replace it too. With this antenna the BitError rate in DMR at the hotspot went up to 7%. When I used a good antenna, everything was good again -> BitError rate less than 0,5% ! I did not get a good unit unfortunately. :(

An external microphone has always worked well, no fault here.
In the future I will buy again a radio of the brand "TYT", maybe I have more luck here. 8-)

Greetings from Tyrol, 73 Alfred
http://tyrofly.at/
The RT-3S and MD-UV380 are the same radio hardware and both are made in the TYT factory.

I don't think TYT or Retevis actually test the radios in the factory


Anyway, at least you have fixed the problem.

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PU4BLA
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Re: Wind noise on internal microphone

Post by PU4BLA » Fri Dec 09, 2022 1:30 am

Have you tried to do this test in UHF ?
I'm testing 2 x RT3S Retevis radios with Opengd77 in UHF
and I don't observe the problem reported.

G4EML
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Re: Wind noise on internal microphone

Post by G4EML » Fri Dec 09, 2022 1:35 am

If you read the thread you will see that the radio in question had a faulty microphone which has now been replaced.

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PU4BLA
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Re: Wind noise on internal microphone

Post by PU4BLA » Mon Dec 12, 2022 3:43 am

your hardware doesn't have metal shielding between the circuits, maybe the noise is due to the lack of internal shielding. Mine doesn't have this problem

Recards

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oe7abh
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Re: Wind noise on internal microphone

Post by oe7abh » Fri Dec 16, 2022 12:00 pm

If anyone has this problem, I can recommend these (internal) microphones. They work perfectly!
https://www.amazon.de/sourcingmap-Elekt ... C87&sr=1-1

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