Tape Op Omnis

ubertar · Post by **ubertar** » Mon Jan 09, 2006 6:05 am

Here's a list of data for the capsules digikey has-- it looks like panasonic WM-61A (digikey part # P9925-ND) is the best choice. I think I'm going to order a couple of those, unless someone has a better suggestion.

Scodiddly · Post by **Scodiddly** » Mon Jan 09, 2006 6:09 am

WM-61A is the right choice.

ubertar · Post by **ubertar** » Mon Jan 09, 2006 6:18 am

Thanks, Scott.

crookedsound · Post by **crookedsound** » Mon Jan 09, 2006 8:16 am

THANKS! I really appreciate it. I'm glad I found this out before heating up the iron!

If anyone wants a deal on these Knowles capsules...let me know! ha

I have four of them.

Or...I'll take suggestions if anyone thinks they are good for any other diy type project.

Eric

ubertar · Post by **ubertar** » Sat Jan 14, 2006 12:03 pm

Got the new capsules-- I have a question: I want to set up a pair of these, for binaural recording. Do I need two 9v batteries, or will it work to hook up both circuits to the same battery? Would two circuits to the same battery provide 9v to each circuit and draw twice the current from the battery, or would they split the voltage?

Phiz · Post by **Phiz** » Sat Jan 14, 2006 12:52 pm

It depends how you wire it up. A single 9V battery certainly can supply enough current to run two capsules. Here is a badly drawn schematic of how to do it:

ubertar · Post by **ubertar** » Sat Jan 14, 2006 1:45 pm

Thanks Scott!

oops-- I meant, thanks, phiz!

and yeah, I was going from the original schematic from the article. I can put 2 and 2 together. Actually, I'm not doing a separate mic connector to the capsule, but wiring straight from the capsule to the rest of the circuit, and adding an on/off switch to the 9v. It's not hard to follow the schem and see what to do.

Scodiddly · Post by **Scodiddly** » Sat Jan 14, 2006 2:57 pm

Phiz wrote:It depends how you wire it up. A single 9V battery certainly can supply enough current to run two capsules. Here is a badly drawn schematic of how to do it:

That looks incomplete - where's the mic capsule? I'm guessing it's on the other end of the XLR marked "mic" - the same kind of setup as the original TapeOp article, where the capsules were mounted in XLR plugs.

Phiz · Post by **Phiz** » Sat Jan 14, 2006 3:00 pm

Scodiddly wrote: That looks incomplete - where's the mic capsule? I'm guessing it's on the other end of the XLR marked "mic" - the same kind of setup as the original TapeOp article, where the capsules were mounted in XLR plugs.

Yeah, I was assuming he was going with the orginal seperate power supply style design. Did I guess right?

crookedsound · Post by **crookedsound** » Sat Jan 14, 2006 4:09 pm

What would you use for the head?

Would you need a manikin head? or a styrofoam wig head?

What material should that be made of for the best results?

ubertar · Post by **ubertar** » Sat Jan 14, 2006 4:31 pm

crookedsound wrote:What would you use for the head?

Would you need a manikin head? or a styrofoam wig head?

What material should that be made of for the best results?

I'm going the cheapest and most lifelike route available... using my head. I'm going to stick 'em in my ears.

Tchad Blake wrote:When I'm outside and walking around, and really in the field, I use my little portable setup -- two omnidirectional Sony ECM50 Lavalier mics which I stick in my ears, attached to a headband that keeps the wires in place.

ubertar · Post by **ubertar** » Sat Jan 14, 2006 8:09 pm

Schweet. I hooked up the binaural thing tonight and tested it out by shaking a tambourine and moving it up and down, in front and behind me, and it works really well. I got to try out a neumann head when I was in school, and the effect is the same. I'm going to use this a lot.

RefD · Post by **RefD** » Sat Jan 14, 2006 11:46 pm

okay, this has moved to the front of my DIY to-do queue!

ubertar · Post by **ubertar** » Sun Jan 15, 2006 12:27 pm

Here's a clip: http://www.ubertar.com/creot/binaural.MP3

You have to wear headphones or earbuds for it to work.

strdsk · Post by **strdsk** » Mon Jan 16, 2006 11:48 am

I just built one of these mics and admit that I did not yet build the power supply or check for continuity as I built it. The instructions that I found said that phantom power could be used to power it as long as it was shut off when I plugged the mic in and allowed 10 minutes foe discharge. When I plugged the mic in it worked but had a very low output, was distorted to all hell, and seemed to have a hum or buzzing problem. Was I mislead with this phantom power advice and do I need to use the mic's proprietary power supply for proper operation? Please keep in mind that I am a DIY beginner and had a bitch of a time soldering that Panasonic WM-55A 103 capsule to some leads! Maybe I applied heat for too long and burnt out it's inner element? Also, how the heck do you even check your projects for continuity as you go? Thanks VERY much in advance...Joe

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Tape Op Omnis

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