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Re: Dismantling LDC to use capsules as ORTF in a blimp
Depends how you choose to mount the boards. If there are no components on the other side and you mount them on the same surface as the capsules - say on the lid - it seems these wires should be long enough. But it depends also on stand offs you choose. You will determine it when putting it all together. There's no way to know beforehand. And from the photo alone ? |
Re: Dismantling LDC to use capsules as ORTF in a blimp
A couple of final questions about this.
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First- my friend has the mics dismantled (photo attached), the mic capsule is connected to the pcb by two short wires (5cm) and I figure these might have to be extended to allow for mounting on the type of box suggested by @pmfalcman in the thread above. Thoughts and suggestions much appreciated.
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When I bought the pair of mics pictured, i also bought the smaller, cheaper "neat worker bee II". The construction is like a smaller bodied version of the mic above, with a slightly smaller capsule. I would like to do something with those capsules also.
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Here's a pic of the worker bee II:
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If I could ask what might be fairly naive questions- I have googled but didn't find definitive answers
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1. Is it possible to use cardioid capsules in a SASS type array? I know the pickup pattern would be different. My plan would be to have the mics dismantled as with the example above. Has anyone tried it?
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2. I spoke to Curt Olson a little while back, by email, most of you probably know Curt's winged and half-sphere stereo arrays:
Curt kindly answered my questions and indicated that cardioid capsules could be used in the half sphere array, albeit with a more directional stereo field. Looking at the mounting of the capsule in the headbasket of the mic, it's centered and a bit away from the edges, and if I understand how the winged and half sphere arrays work, the edge of the capsule needs to be flush or almost flush to the surface- because of the boundary effect?
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I'm sorry if these questions are a bit naive, it's hard to find information on these things when your test case is so specific. I'm really keen to understand.? |
Primo em288z1
Hello everyone I found a curious model to build.
I want to use the Primo EM288Z1 as a replacement for the Sanken cos-11d with the Sennheiser 5212 Radio System. I just don't understand, is it necessary to use a preamp or is it enough just to solder the mini jack? Maybe there are some nuances of connection? ?
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Re: Sound Sleuth Tabitha and the wind
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On Mar 21, 2025, at 16:18, Deviotech via groups.io <Deviotech@...> wrote:
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Re: Sound Sleuth Tabitha and the wind
Ahh, excellent. ?Thank you! ?This should be a bit easier than I thought. ?I’m really excited to try this mic out, both for instruments and field recording. ?I really appreciate these kits you’ve put together, and hope that in the future I can add a couple more to my collection! |
Re: Sound Sleuth Tabitha and the wind
开云体育This works:?? And any that will fit an AT2020 will work.Best Regards, Jules Ryckebusch? On Mar 21, 2025, at 12:55, Deviotech via groups.io <Deviotech@...> wrote:
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Re: Sound Sleuth Tabitha and the wind
开云体育The mic body will let you fit any dead cat that fits a mic that size. I’m out now but will send a link to a few.?Best Regards, Jules Ryckebusch? On Mar 21, 2025, at 12:55, Deviotech via groups.io <Deviotech@...> wrote:
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Sound Sleuth Tabitha and the wind
I think this question is mostly for Jules, but anyone else should feel free to chime in! I’ve purchased a Tabitha kit direct from JLI and am looking forward to building it! ?I want to use it for field recording but understand that the wind will be a constant foe. ?What kind of wind protection is available for this mic, is the body a standard size so that I can use kit that’s already available? ?Is there a 3d file for a diy blimp that I can get somewhere? ?I’ve got some sewing skills so I am thinking about making a dead cat for it, but I understand that I’ll likely need a structure and a layer of foam to maximize its effectiveness. ?Really, any hints will be graciously accepted here as I’m very fresh to the concept of recording outside with a large microphone like this. ?Thanks! |
Re: capsule suggestion needed for loud environment recording
Non-expert here, but in case it's useful:
I have read somewhere that the 5024 capsule is great for that application, however I believe I read that it may distort if used for loud environments such as airports (jet take offs) or loud factory settings.I made a "Simplest P48" mic to put inside my cajon, and that application may see louder SPL than what you're describing (depends on how close you are to that proverbial jet.) Depending on what you are anticipating, you might get by with the 5024 with a lower-sensitivity circuit? If you really need the capsule to handle some high SPL, there are some options, but I didn't find one with the same SNR as the 5024 that also could handle high SPL. (In my application it didn't matter, because the cajon "kick drum" was blasting loud and the SNR wasn't an issue because I didn't need to capture quieter things. Maybe similar dynamics will factor in your decision.) You might look at JLI-60Axxx capsules. Said Brad Confer from JLI: "The JLI-60Axxx mics are all varieties the same capsule.? The letter after the A (T, Y, etc.) denotes sensitivity of the element.? T would equate to a -44 +/- 3dB.? Check the sensitivity section next to the line drawing for the other suffix values.? The -102 denotes a tighter tolerance of +/-2dB. The exception to this is the JLI-60A-T.? It is a different mic than the above series, but equivalent." I ended up with a JLI-64PCX "linkwitzed modified" and used with the RCA version of the Simplest P48 circuit (with a 47k resistor). (When I tried a 5024 with that RCA/SP48 circuit, it indeed clipped the mic capsule, but "kick drum" like noises can be super loud.) Other low-sensitivity omnidirectional capsules I can find; no idea which of these are good/bad/whatever: MCE-4001???????????????? (should be identical to JLI-60AY) max SPL 115 dB JLI-60AT???????????????? 6mm sens -44dB, 58dB SNR, very flat >20Hz JLI-60AY???????????????? 6mm sens -42dB, 58dB SNR, very flat >20Hz Soberton EM-4530???????? 4.5mm sens -42dB "110 max SPL" 58dB SNR, flat >30Hz Soberton EM-6050???????? 6mm sens -43dB "110 max SPL", 58dB SNR, flat >30Hz CUI CMEJ-0627-42-SP????? 5.5mm sens -42dB "115 acoustic overload", 60dB SNR, flat >100Hz? (330Ohm internal resistor) CUI CMC-6035-130T??????? 6mm sens -42dB "130 acoustic overload", 70dB SNR, flat >100Hz Brad at JLI also said "the highest SPL rated 6mm I have is 110-120, depending on the version." Not sure which capsule he meant there, my notes are incomplete. He also said "if you can use a larger mic, I have a 25mm cap that will do 130dB..." (presumably the JLI-2590A which is a 3-wire.) Some links for the above: René from this list said: ""I think the CUI CMC-6035-130T might be good. 70dB snr is good, but it is a weighted measurement, about 58dB is the old norm. Some JLI datasheets also quote the snr as weighted, others not. Datasheets for mic capsules are very hit or miss..." Hope that's helpful, -Casey |
Re: capsule suggestion needed for loud environment recording
开云体育That capsule had a max SPL of 110dB. If you go straight to a condenser without built in FET you can pad it with a capacitor. I’ve used the 2555B with a 220pF capacitor as a drum mic. It handles a very high SPL.Best Regards, Jules Ryckebusch? On Mar 18, 2025, at 18:20, JAMES B via groups.io <guardtech@...> wrote:
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capsule suggestion needed for loud environment recording
Hello Folks,
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I'm finally trying to get back to completing my SASS project using the? PUI 5024 capsules.
The SASS with the 5024's is intended for use in quiet, natural ambient recordings.
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Since I will already building that and will have the my shop "in motion" I wanted to address a question I had.....
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I have read somewhere that the 5024 capsule is great for that application, however I believe I read that it may distort if used for loud environments such as airports (jet take offs) or loud factory settings.
I'd like to build a second SASS but for louder situations.
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Is there a mic capsule better suited for loud subject matter that one of you folks might suggest, or is the 5024 also usable in louder situations?
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thank you
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Re: Where can I find a 5 pin connector for my dual true condenser Alice?
开云体育
AN A5M ?? DIGIKEY OR MOUSER
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Re: Where can I find a 5 pin connector for my dual true condenser Alice?
On Sat, Mar 15, 2025 at 9:17?AM Scott Helmke via <scott=scotthelmke.com@groups.io> wrote: I think they're looking for a Switchcraft A5M, which is a whole plug - --
Best Regards, Jules Ryckebusch 214 399 0931 |
Re: Where can I find a 5 pin connector for my dual true condenser Alice?
I think they're looking for a Switchcraft A5M, which is a whole plug - but the insert is what you find. Or copies of that design.
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-Scott On 3/15/25 08:54, JAMES B wrote:
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---- Scott Helmke ---- scott@... ---- (734) 604-9340 ---- "I have ceased distinguishing between the religious and the secular, for everything is holy" - Joe Henry |
Re: Where can I find a 5 pin connector for my dual true condenser Alice?
On Saturday, March 15, 2025 at 09:04:14 AM EDT, JAMES B <guardtech@...> wrote:
is this type what you are referring?to?
On Saturday, March 15, 2025 at 08:21:29 AM EDT, Muninn via groups.io <ninmiso@...> wrote:
Like on of these, the one that mount inside the chassis with a screw. Can't find them anywhere!
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Re: True Condenser OPA High Impedance Stage
#dualopaalice
You have a right to toot that horn a bit. was the post that got me started with this whole crazy obsession back in November. I was looking for any information I could find about how to make my 603s sound better and this was the post that really lit a fire under me. Since then, I've completely destroyed a 603s, bought two more used and re-implemented them with better components and replaced and re-biased the JFETS. They now sound "better" but I needed more.
I found Scott Helmke's "Alice" mic through your blog and got super inspired. That led me to Jules' OPA Alice but I do things the hard way and wanted a front-address mic to stick under the bridge of my contra bass. I've been iterating on that for awhile and am narrowing in on a prototype using my own PCBs, 3D printed parts, brass tubes and copper mesh. It sounds pretty good but there is still measurable distortion in the mids because I was just guessing on the PCB design. It sounds better than the 603s mics I modded and I'm pretty sure this next PCB design is a lot better, after studying up on it. Now I'm thinking about building an OPA into an MXL 990 with an RK47C capsule. Like I said. I'm obsessed. ?
I've come pretty far in 3 months but there is so much to learn. The breadcrumbs of information left by you, Matt and Jules are like beacons of light to me and I really appreciate it. There really are not many good resource for this information -- especially in the age of ChatGPT. |
Re: True Condenser OPA High Impedance Stage
#dualopaalice
Not to toot my own horn, but schematics of many mics I've tinkered with are on audioimprov.com. Not well organized, but there is a list of topics.
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3-pattern electret made with 2 cardioid electret capsules (works great with TSB2555s):
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3-patterns with double side "true condenser" capsule (2 cardioids back to back):
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Variable pattern mic with one diaphragm grounded, backplate at 70V DC and signal taken there, other diaphragm variable 0-140V DC, grounded for audio:
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and the ever popular basic mic circuits:
I need to add the OPA Alice to the basic circuits.
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