Author Topic: Capacitor Identity Mystery Solved  (Read 1371 times)

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Online calzapTopic starter

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Capacitor Identity Mystery Solved
« on: March 04, 2014, 06:23:27 pm »
Last December I asked for help in identifying several capacitors
(https://www.eevblog.com/forum/projects/name-that-cap!/msg340184/#msg340184).  One of two that weren't identified is the brown ceramic shown below.  I had speculated that it might be a Matsushita, but wasn't convinced because the M wasn't fully enclosed in a box (see pic of a black Matsushita capacitor below).  Or maybe it was a stylized version of the CM that many manufacturers use to indicate ceramic multilayer.  In January in response to Dave's teardown of a Sennheiser microphone (blog 571), I asked what the tin can was that appeared at about 17:40 into the video and speculated that it might be an oscillator (see pic below).  I quit following the thread after a couple of days, but then just looked again, and sq6rdy has posted a reply that it is a SAW filter made by muRata.  Sq6rdy is absolutely right; that's what it is.  However, the muRata logo on the can looks a lot like the one on the brown capacitor.  A little searching turned up a pic of a recently made muRata cap (see blue cap below).  I'm convinced that my cap was made by muRata.  Double thanks to sq6rdy.

Mike in California
 

Offline NiHaoMike

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Re: Capacitor Identity Mystery Solved
« Reply #1 on: March 04, 2014, 06:43:04 pm »
That black part looks more like a MOV.
Cryptocurrency has taught me to love math and at the same time be baffled by it.

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Online calzapTopic starter

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Re: Capacitor Identity Mystery Solved
« Reply #2 on: March 04, 2014, 06:49:02 pm »
Yup, you're right;  the black part is a MOV.

Mike in California
 


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