Added a mic but noise...

[rds2dys]

Thanks to many guides in this forum, I have added a mic inside my TX as shown in the picture below.

http://i38.photobucket.com/albums/e108/ds2dys/CIMG1585.jpg

It works ok with the Voice Memo but sometimes (not always) there is some noise which sounds like from an old radio's volume.

I tried to add an RC filter(0.1uF and 10kohm) but no help so left only the mic.

Any suggestion would be appreciated.

Jinseok

[NarrowRoad]

It looks like the metal body of the mic resting on that ground plate is probably a bad idea. Try insulating the mic; either with tape around the mic or tape on the ground plate. I don't know if anything uses the ground plate so be careful about covering it completely with tape; it's probably better just to wrap the mic in tape. BTW, thanks for the pic, I didn't know it was that easy. I think i'll try it myself. Have you done any long-term recording? I'm wondering if the battery can last for a 3-4 hour recording.

[Drunkard]

I don't know what your expecting, but an electret microphone (http://en.wikipedia.org/wiki/Electret_microphone) doesn't usually have the best noise floor.

[Nobitsu]

bluetooth headset connectivity with palm = best mic + no annoying noise + no void warranty.
Someone should program such a program!!

[NarrowRoad]

bluetooth headset connectivity with palm = best mic + no annoying noise + no void warranty.
Someone should program such a program!!

Sounds like a battery killer to me. Keep it simple.

[cllo]

Sounds like a battery killer to me. Keep it simple.

lol, y would u care about it being battery killer. the tx have all the battery i will need. No matter how much i use it, it will for sure last me one whole day.
BTW, i am a heavy user and most of the time i use wifi, so it will be all good.

[dmitrygr]

streaming video over wifi kills battery of mine in 6 hours, even with dynamic clocking enabled and topping out at 200 mhz

[Nobitsu]

But look at it this way, not everyone would be voice recording for 6 hours straight and it wouldn't hurt to try right? :P

[NarrowRoad]

lol, y would u care about it being battery killer. the tx have all the battery i will need. No matter how much i use it, it will for sure last me one whole day.
BTW, i am a heavy user and most of the time i use wifi, so it will be all good.

Because I would use it to record lectures up to 3 hours long. If I start recording with a battery less than full it may not last that long.

[rds2dys]

I don't why but the noise has been getting worse today and now the noise is much louder than any recorded voice. I tried to change other mic but the same. I'm sure there was not problem with soldering. So I removed the mic. Funny thing is, now without mic, Voice Memo still record and play the noise. I'm afraid I ruined something, but my TX is still working fine except the mic..... ?!#@%!@#$%!$

[JAmerican]

Yea, I stopped using my mic because it has a small range that it can pick up before it sounds terrible. You can't talk to loud near it or it just sounds terrible.

I haven't tried it with my replacement TX though so let me see.

EDIT: Actually my mic sounds great but it still can't handle loud sounds near it. I used the mic from a broken UX :)

JAmerican

[Nobitsu]

I think soldering a mic to the palm is too much work. I think it's best just to buy an external mic and use it when you need to.