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 Post subject: Wanted : electret condenser microphone capsules...
PostPosted: Fri Nov 10, 2017 1:48 pm 
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Joined: Fri Feb 01, 2002 1:01 am
Posts: 1761
Location: Mideast USA
Hi all. Please check behind your spider webs for any vented electrets. Typical 9.5mm size or low profile; with or without pins/leads.

They look like :

Attachment:
Vented.jpg
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Attachment:
vented2.jpg
vented2.jpg [ 12.33 KiB | Viewed 807 times ]

Attachment:
vented3.png
vented3.png [ 64.69 KiB | Viewed 807 times ]


Miguel



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 Post subject: Re: Wanted : electret condenser microphone capsules...
PostPosted: Sat Nov 18, 2017 12:30 pm 
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Joined: Sat Aug 12, 2006 4:17 pm
Posts: 1276
Electronics Goldmine has these:
Image
http://www.goldmine-elec-products.com/p ... ber=G20765


Signed Janitor Tzap


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 Post subject: Re: Wanted : electret condenser microphone capsules...
PostPosted: Sun Nov 19, 2017 5:14 pm 
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Joined: Fri Feb 01, 2002 1:01 am
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Location: Mideast USA
Thanks, Tzap.

The venting is at the connection side. Yours show the perforations at the sound side.

Ordered some but coming from a chinese vendor is a roulette; if they ship exactly what they show pictured or whatever they want.
I do not think they know what they are selling. Should be here in a week and then will have a good or bad surprise with a complain from me.
But for $1.60 a dozen, its worth the gambling... Will see.



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 Post subject: Re: Wanted : electret condenser microphone capsules...
PostPosted: Sun Nov 19, 2017 6:31 pm 
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Joined: Sat Aug 12, 2006 4:17 pm
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Okay,

But I think you've got a longer wait, since they are being shipped from China.
{I was thinking it was going to be at least a month before you'd get them. If you went "FREE SHIPPING".} :razz:

If you just need one, go dumpster diving for a cheap crappy {wired} phone.
Image
Or
An old Cordless Phone.
Image
Just crack it open and grab the condenser mic out of it.


Signed: Janitor Tzap


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 Post subject: Re: Wanted : electret condenser microphone capsules...
PostPosted: Mon Nov 20, 2017 7:40 am 
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Joined: Fri Feb 01, 2002 1:01 am
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Location: Mideast USA
:x Have about 2 dozen from canibalized gadgets and telephones of all sorts, none is vented :cry:

Drilled low the sides of one carefully with 0.40mm holes and still works, seems I did not break anything inside, but unsure the plastic spacer inside got drilled all the way trough. One more week to see if wasted my wait time. :sad:



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 Post subject: Re: Wanted : electret condenser microphone capsules...
PostPosted: Mon Nov 20, 2017 9:19 am 
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Joined: Sat Aug 12, 2006 4:17 pm
Posts: 1276
Are you trying to make a "Noise Canceling" circuit?
Or are you wanting to make an Omnidirectional Microphone?

Because the images of capsules you have posted here, are designed just for that type of application.
The Link I put in to Goldmine Electronics of the Panasonic WM-54BT, is a Omnidirectional Microphone.


Signed: Janitor Tzap


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 Post subject: Re: Wanted : electret condenser microphone capsules...
PostPosted: Mon Nov 20, 2017 11:34 am 
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Do not care about directionality, but the noise cancelling feature does not bother to have.
Building scuba intercoms and pressure at depth would burst the electret film if not vented...



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 Post subject: Re: Wanted : electret condenser microphone capsules...
PostPosted: Wed Dec 13, 2017 3:39 pm 
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Electrets arrived from China last week. As expected, not vented, another idiot vendor and the typical ignorant advertising.
Am drilling the ones I have for the project. Done. Erase the blackboard...



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 Post subject: Re: Wanted : electret condenser microphone capsules...
PostPosted: Thu Dec 14, 2017 12:43 pm 
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Externet wrote:
Electrets arrived from China last week. As expected, not vented, another idiot vendor and the typical ignorant advertising.
Am drilling the ones I have for the project. Done. Erase the blackboard...
This is why I said go look at Electronic Goldmine.
At least they have a Toll free number: 1-800-445-0697.
Thus, you can talk too an actual person, and ask if the mic they have is rear vented.

I personally prefer checking the electronic supply companies in the USA first for an item, before considering getting it from over seas{China}.

I've been burned to many times now too consider purchasing a item off e-bay from a seller in China.


Signed: Janitor tzap


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 Post subject: Re: Wanted : electret condenser microphone capsules...
PostPosted: Mon Jan 01, 2018 3:44 pm 
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Joined: Thu Oct 26, 2006 7:11 pm
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Location: Maryland
Don't know what you paid for the mics, but look at this:
http://www.taydaelectronics.com/microphones/condenser-microphone-2-2k-ohm-1-5v.html
$0.25 Ea!



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