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DaveS
audio school
Joined: 08 Mar 2010
Posts: 6
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 Posted: Sat Dec 10, 2011 11:53 am Post subject: anyone build diy dynamic mics? |
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I couldnt find much info on building dynamic mics. Mostly plans for sub kicks and electrets.
I am looking for schematics and some transducer suppliers.
Any ideas?
Thanks!!! |
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kslight
george martin
Joined: 13 Oct 2009
Posts: 1251
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| Posted: Sat Dec 10, 2011 12:45 pm Post subject: Re: anyone build diy dynamic mics? |
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| They're definitely out there...don't have any direct links for you but isn't a sub kick mic just a speaker wired backwards? |
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DaveS
audio school
Joined: 08 Mar 2010
Posts: 6
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| Posted: Sat Dec 10, 2011 1:09 pm Post subject: Re: anyone build diy dynamic mics? |
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Sure is. But I was looking for suggestions on other aspects of dynamic micssuch as transformers to use etc.
Maybe it's too easy - wire a capsule to a step-up transformer then to XLR.....
is it that easy? |
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ubertar
ghost haunting audio students
Joined: 18 Feb 2004
Posts: 3260
Location: Brooklyn, NY
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| Posted: Sat Dec 10, 2011 2:18 pm Post subject: Re: anyone build diy dynamic mics? |
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| DaveS wrote: | Maybe it's too easy - wire a capsule to a step-up transformer then to XLR.....
is it that easy? |
Personally, I wouldn't consider that DIY. Wind your own voice coil, attach it to a diaphragm so it can move in relationship to a magnet, and now we're talking. Better yet, wind the transformer too-- but that's for extra credit. The one thing you left out was the enclosure, and the openings needed to create the pickup pattern, unless you want omni.
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Scodiddly
TOMB Moderator
Joined: 10 Dec 2003
Posts: 3154
Location: Libertyville, IL, USA
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| Posted: Sat Dec 10, 2011 5:57 pm Post subject: Re: anyone build diy dynamic mics? |
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By that standard almost nobody is building DIY condensor mics either, since the capsule is kind of important!
There are people building ribbon mics, which are technically dynamic mics. |
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ubertar
ghost haunting audio students
Joined: 18 Feb 2004
Posts: 3260
Location: Brooklyn, NY
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| Posted: Sat Dec 10, 2011 6:45 pm Post subject: Re: anyone build diy dynamic mics? |
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| Scodiddly wrote: | By that standard almost nobody is building DIY condensor mics either, since the capsule is kind of important!
There are people building ribbon mics, which are technically dynamic mics. |
True, on all counts.
almost nobody is building DIY condensor mics
What most people do is DIY assembly, not building, or at least something in-between. Still a worthy accomplishment, but not to be put in the same category as making the capsule. Now that's impressive! (That's not to say that making the housing and doing the circuitry, etc. isn't impressive-- it is, and I have a lot of respect for what you do... it's just that making capsules is on a whole other level).
There are people building ribbon mics
I was one, for a while. I'd love to get back to that, if I could find the time. I made a bunch of motors for phase II of the ubertar ribbon mic, but they've just been sitting around waiting to be completed into mics. Ribbon mics are the easiest kind to do from scratch... nowhere near on the level of making a condensor capsule.
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my new record:
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“In this field, the number two is important. We count one, two, infinity.” Jill Tarter |
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Brett Siler
resurrected
Joined: 05 Dec 2003
Posts: 2341
Location: Evansville, IN
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The Scum
deaf.
Joined: 04 Jul 2003
Posts: 1994
Location: Denver, CO
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| Posted: Sun Dec 11, 2011 3:36 pm Post subject: Re: anyone build diy dynamic mics? |
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10 or 12 years ago I made some ribbon mics...smallish horseshoe magnets with a tiny sliver of foil in the gap, with a sugarcube transformer for coupling. They worked, but not well enough to turn into a buttoned up package.
The mechanical construction was pretty precarious - I only had hand tools at the time.
With modern neodymium magnets, and all of the sources of information & parts on the internet, it's probably easier now. I've got sketches of a ribbon motor that could be machined from delrin if & when I find the time again.
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strdsk
re-cappin' neve
Joined: 01 Oct 2004
Posts: 798
Location: Illinois...near Chicago
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| Posted: Mon Dec 12, 2011 3:43 pm Post subject: Re: anyone build diy dynamic mics? |
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DaveS....what is your skill level? That's an important question to ask out of the gate. I learned tons from taking apart old dynamic mics. Pretty easy actually. Ribbon mic fab is fun too. You can even use ribbon assemblies made for speaker tweeter use coupled to a tranny. You can use very small tweeters with a trannt for dynamics. But yes...porting and chassis build outs are the hardest thing by far when figuring directionality. My definition of DIY is literally do it yourself...meaning...assemble it yourself....as in....don't make Shure assemble it for you. No matter what anyone tells you...that is DIY at it's finest. Anything else is called a scratch build....which yes...almost no one does because they cannot. See stuff I build at www.facebook.com/tonaleclipse Best...JD!
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willhouk
alignin' 24-trk
Joined: 16 Jun 2008
Posts: 63
Location: Carson City, NV
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| Posted: Tue Dec 20, 2011 5:23 pm Post subject: Re: anyone build diy dynamic mics? |
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A friend of mine had a "mic" that was a headphone speaker duct taped to the inside of a plastic cup. The 1/8" went to 1/4" then to a practice amp. It sounded like crap but in a kind of cool way.
Is that a DIY dynamic mic?
I know it's not, I'm just kidding. Reading this thread reminded me of ol' "Cup Mic."
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Be well, do good work, and keep in touch. |
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strdsk
re-cappin' neve
Joined: 01 Oct 2004
Posts: 798
Location: Illinois...near Chicago
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| Posted: Tue Dec 20, 2011 5:32 pm Post subject: Re: anyone build diy dynamic mics? |
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In a way it IS kind of a grassroots, home brew, ghetto fabulous version of DIY....yes! Anything that sparks creativity...necessity is the mother of invention!
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Brett Siler
resurrected
Joined: 05 Dec 2003
Posts: 2341
Location: Evansville, IN
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LesW
audio school
Joined: 24 Apr 2010
Posts: 4
Location: tiger, ga
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| Posted: Wed Dec 28, 2011 9:55 am Post subject: Re: anyone build diy dynamic mics? |
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You can certainly design dynamic mics. They are typically more complicated than either condensers or ribbons. Many communicating chambers are usually required.
A machine shop and electroacoustics knowledge would be helpful!
If you just want capsules then search alibaba. Plenty out there but perhaps not in small quantities.
Just have a look at the humble Shure SM57 design. Not trivial. four chambers.
http://www.google.es/patents/US3240883?printsec=drawing#v=onepage&q&f=false
Some of Alpha Wiggins variable d designs were far more complicated!
Les
L M Watts Technology
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frans_13
alignin' 24-trk
Joined: 07 Mar 2011
Posts: 62
Location: Bavaria, Germany
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| Posted: Sun Jan 01, 2012 6:02 am Post subject: Re: anyone build diy dynamic mics? |
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I once got a broken Jecklin (not the electrostat version) pair of headphones and put the working capsule (nearly 2 inches diameter!)in a soapbox with some holes and a XLR connector. Made everything sound boooooom - it was the only thing you could put in front of a Marshall valvestate that made it remotely sound like an amp. That mic was used for years and years on stage and now & then gets out for a subkick-kinda thing.
I once even sang a whole track with it. |
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