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Re: Capsule damage during soldering

 
Edited

You don't want to use thin solder wire as you will spend unnecessary time pushing it into the joint, adding extra heat. I usually use 0.6mm to 0.8mm rosin core. The Pinecil64 soldering iron has served me well and +- 1 degree C makes a meaningful difference. You want to be able to melt the solder fast, but not so fast the flux is spitting or smokes away instantly.

A soldering iron is several times hotter than the maximum temperature you want to reach the diaphragm. Even low melting solder is hot in comparison. A true eutectic 63/37 solder has a normal melting point, but melts and solidifies instantly with complete certainty. I can't overemphasize how important this is. Uncertainty is the main thing that leads to overheating. Not being able to tell whether the solder is melted, needs more flux, whether it's solid yet, whether it needs to be redone. With a good roll of 63/37 (and many of them do not have an accurate alloy mix), soldering is very quick and decisive. You don't need to hold the iron on for any longer than it takes for both surfaces to be "wetted". The pad does not have to be completely covered in solder, you just want to look at the edge of the solder blob and see that it is joined with the pad, rather than sitting on top like a bubble, and the moment you see that you remove the iron.


Re: Capsule damage during soldering

 

I can second your recommendations, but I'm just wondering why you use IPA. Can you explain? It does not remove oxides, only organic contaminations. Flux would remove oxides and improve wetability, but you don't want to mess with that on your capsule. At least, I'd rather not use it on capsules. That's why I proposed in another message to scrape off the oxides before soldering. And maybe remove flux residues afterwards with IPA if I'm worried about long term moisture related effects.

OP also asked advice on solder wire thickness. This depends on the dimensions of the objects to solder. I always aim for 40-60% of the padwidth, both for solder wire thickness and solder tip width. The advantage of the thicker solder wire is that it contains more flux and will have better wetting properties.

Jan


Re: Simple set up for concert recording?

 

The Thomann RB100 is a phenomenal mic - for upgrading with a 1.2um
ribbon. I have mounted two together as a Blumlein stereo pair and the
results are superb.

Best wishes

David P

On Thu, Nov 9, 2023 at 1:29?AM Dude <Danas.bollinger@...> wrote:

David, do you have any recommendations for a ribbon mic build? I have done 1 ribbon kit and 1 from scratch save for the body.

Best Regards,
Dude

On Wed, Nov 8, 2023 at 10:48 AM David Pinnegar <antespam@...> wrote:

I use a Sanyo Xacti ICR-XPS01M but these are as rare as hens' teeth
and have also used a Tascam DR40 both to great effect.

Separate mics need mic stands and setting up, which isn't particularly
audience recording friendly.

AKG D202s are great as are the D200s. The D224s aren't as robust.


For pencil mics Takstar CM60 are excellent but need phantom power.

I've really moved to ribbons but possibly too fragile for your application.

Best wishes

David P

On Wed, Nov 8, 2023 at 2:48?AM W2HX <w2hx@...> wrote:

Hello, I am a new member and a newbie to recording.



I am looking to create a simple, transportable set up to record live rock/jam band concerts from the audience without access to the soundboard. I purchased a Tascam Portacapture X8 and I have been learning the ins and outs. My first attempt for microphones were these low-cost pencil mics from amazon: I used them and found that the sound was pretty awful, even for a novice. They were very thin sounding and lacked bass.



I am looking to this group for a recommendation on a pair of mics that would be more suitable for this purpose (loud concerts recorded from the audience). I think they should be directional, but I am not wedded to pencil or booms, unless the folks here think those are the right solutions. My budget is about $200 per mic but happy to spend less if I could or could stretch a bit if necessary.



I did look at the Sennheiser MKE 440 as the sound seemed really good. What I don¡¯t love about it is that it needs its own batteries. I would prefer something that could use the phantom power of the Tascam (or no power if dynamic) or USB powered, but I am not looking for the audio to pass over USB, I think XLR would be the way to go. I also don¡¯t love the idea of the built in cable as others have noted.



Can anyone recommend a pair of mics that sound good, can use either no power or power from the Tascam or a USB-C power connector and XLR if possible. The Tascam X8 does have a 1/8¡± (3.5mm) line-in jack but not sure how well that will work.



Ok, enough from me. Thank in advance for your thoughts.



73 Eugene W2HX

Youtube Channel:





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David Pinnegar, B.Sc., A.R.C.S.
- - - - - - - - - - - - - - - - - - - - - - - -
+44 1342 850594




--
- - - - - - - - - - - - - - - - - - - - - - - -
David Pinnegar, B.Sc., A.R.C.S.
- - - - - - - - - - - - - - - - - - - - - - - -
+44 1342 850594


Re: Simple set up for concert recording?

 

What I've been using for the last 30 years for binaural recordings is small electret capsules in a PIP configuration (first with the Walkman Pro, then on DAT, then on MiniDisc, and now with the DR-70):
I mount the capsules on each branch of my glasses near the ears. You can also fix them to holders fashioned out out of stiff wire that you slip around your ears.
Those are excessively inexpensive and easy to build- just solder the capsules to a recycled headphones cord.
The tricky part is to find capsules that are matched in sound and level that do not distort at high SPL. And thy are incredibly susceptible to wind noise: You can't use those outside unless it's very still or wear a special angora headband.
And if you want to record live shows with those you must remain silent and still, and make sure the people around you aren't too rowdy...
I find the imaging very good: translates well to speaker or headphones listening. but it gives a mostly omnidirectional pickup, so they'll reflect the acoustics they're in.
My experience.

Le 2023-11-08 20:11, Richard Lee a ¨¦crit?:
On Tue, Nov 7, 2023 at 06:01 PM, Jules Ryckebusch wrote:

If you want to build something that will
Work and sounds good try these:
This is a good setup.
My $0.02 is that these recorders often have much better performance on their XLR inputs than the 3.5mm PIP jack.? You can build the *SimpleP48* circuit into the male XLR plug to take full advantage of this.
An alternative is a *Binaural* recording setup.? Our own Len Moskowitz sells

which is a very reasonable high quality product.? You clip the mikes to your hat or other suitable headgear.? These are omnis so aren't as susceptible to wind noise.


Re: Capsule damage during soldering

 

I want to add here that a little practice and being quick when you solder to the capsule and you will be fine. I have not damaged on and have soldered multiple capsules.

Do clean the pads with a bit of isopropyl first. Use a temp controlled soldering iron and good solder. I still use 63/37 Kester Eutectic.


Best Regards,

Jules Ryckebusch

On Nov 9, 2023, at 06:09, Richards <jrichards@...> wrote:

?If you really want to remove heat then cover the mic holes with a little sticker and put some water between it and the heatsink.
_______________________________________

Gee ... um ... I would not chance doing that. I suspect water inside the capsule is contraindicated - and it would be easy to accomplish with capsules with rear air ventilation.

I do not always melt the pre-soldered pads. Instead, I use a low melting temperature solder to solder the lead wires atop or to the original solder pads. The new solder often activates the old solder so it becomes one gooey mess before cooling, and if not, the wires are soldered atop the original pads. Hope this makes sense. JHR





Re: Capsule damage during soldering

 

If you really want to remove heat then cover the mic holes with a little sticker and put some water between it and the heatsink.
_______________________________________

Gee ... um ... I would not chance doing that. I suspect water inside the capsule is contraindicated - and it would be easy to accomplish with capsules with rear air ventilation.

I do not always melt the pre-soldered pads. Instead, I use a low melting temperature solder to solder the lead wires atop or to the original solder pads. The new solder often activates the old solder so it becomes one gooey mess before cooling, and if not, the wires are soldered atop the original pads. Hope this makes sense. JHR


Re: Capsule damage during soldering

 

If you really want to remove heat then cover the mic holes with a little sticker and put some water between it and the heatsink. I suppose thermal pads would work just as well if they fit well in the jig. Hasn't someone measured mic drift from soldering before?

On the manufacturing side there are solutions to this problem - press-fit leadout pins, solder wires before swaging the capsule, extra vias in the PCB for press-fit connections, etc.

I guess another idea is to epoxy a leaf spring to a part of the microphone which will press on the pads and maintain contact, or press wires to the pads.


Re: Simple set up for concert recording?

 

¿ªÔÆÌåÓý

Thanks guys. I don¡¯t think I¡¯m up to this type of project (make my own). But the lavalier-style, stealth setup is appealing. For my part, I will mostly be recording in bars or small venues that would have no problem with a tripod set up. But should the day come that I want to tape in bigger places, that binaural set up seems like a great idea.

?

?

73 Eugene W2HX
Subscribe to my Youtube Channel:?

?

From: [email protected] <[email protected]> On Behalf Of Richard Lee via groups.io
Sent: Wednesday, November 8, 2023 8:11 PM
To: [email protected]
Subject: Re: [MicBuilders] Simple set up for concert recording?

?

On Tue, Nov 7, 2023 at 06:01 PM, Jules Ryckebusch wrote:

If you want to build something that will

Work and sounds good try these:?

This is a good setup.

My $0.02 is that these recorders often have much better performance on their XLR inputs than the 3.5mm PIP jack.? You can build the SimpleP48 circuit into the male XLR plug to take full advantage of this.

An alternative is a Binaural recording setup.? Our own Len Moskowitz sells

which is a very reasonable high quality product.? You clip the mikes to your hat or other suitable headgear.? These are omnis so aren't as susceptible to wind noise.


Re: Simple set up for concert recording?

 

On Tue, Nov 7, 2023 at 06:01 PM, Jules Ryckebusch wrote:
If you want to build something that will
Work and sounds good try these:?
This is a good setup.

My $0.02 is that these recorders often have much better performance on their XLR inputs than the 3.5mm PIP jack.? You can build the SimpleP48 circuit into the male XLR plug to take full advantage of this.

An alternative is a Binaural recording setup.? Our own Len Moskowitz sells

which is a very reasonable high quality product.? You clip the mikes to your hat or other suitable headgear.? These are omnis so aren't as susceptible to wind noise.


Re: Primo EM200 + simple P48

 

Operating voltages - these are specified as below.
EM258? 1.5V - 10V
EM200? 3V? ? - 10V
EM204? 3V? ? -10V?
The main use for these electrets is for PIP power with Vds at 3V or less ... so they are specified to give 'some performance' at those low voltages.

But they invariably give much better performance at 5V and there will be smaller improvements up till 10V.? In SimpleP48, operating at 10V sacrifices a bit of the circuit's excellent practical RFI immunity for more low distortion spl and slightly better noise.

Primo may have changed their FET but I wouldn't operate their capsules with standing Vds > 10V.? There are similar FETs which take more voltage but they aren't as quiet as the NECs used by Primo & the better electret makers

Not as a selling ploy but just for information, although the EM200 and EM204 are end of line, we do have quite a good stock of each type, in terms of DIY quantities.
:o Any members with loadsa $$$ to clean up Nick's stock of EM200 & EM204 and reserve them for MicBuilders?? These are probably the best Cardioid electrets with built in FETs and ideally suited for SimpleP48


Re: Simple set up for concert recording?

 

David, do you have any recommendations for a ribbon mic build? I have done 1 ribbon kit and 1 from scratch save for the body.?

Best Regards,
Dude

On Wed, Nov 8, 2023 at 10:48 AM David Pinnegar <antespam@...> wrote:
I use a Sanyo Xacti ICR-XPS01M but these are as rare as hens' teeth
and have also used a Tascam DR40 both to great effect.

Separate mics need mic stands and setting up, which isn't particularly
audience recording friendly.

AKG D202s are great as are the D200s. The D224s aren't as robust.


For pencil mics Takstar CM60 are excellent but need phantom power.

I've really moved to ribbons but possibly too fragile for your application.

Best wishes

David P

On Wed, Nov 8, 2023 at 2:48?AM W2HX <w2hx@...> wrote:
>
> Hello, I am a new member and a newbie to recording.
>
>
>
> I am looking to create a simple, transportable set up to record live rock/jam band concerts from the audience without access to the soundboard. I purchased a Tascam Portacapture X8 and I have been learning the ins and outs. My first attempt for microphones were these low-cost pencil mics from amazon: ? I used them and found that the sound was pretty awful, even for a novice. They were very thin sounding and lacked bass.
>
>
>
> I am looking to this group for a recommendation on a pair of mics that would be more suitable for this purpose (loud concerts recorded from the audience). I think they should be directional, but I am not wedded to pencil or booms, unless the folks here think those are the right solutions. My budget is about $200 per mic but happy to spend less if I could or could stretch a bit if necessary.
>
>
>
> I did look at the Sennheiser MKE 440 as the sound seemed really good. What I don¡¯t love about it is that it needs its own batteries. I would prefer something that could use the phantom power of the Tascam (or no power if dynamic) or USB powered, but I am not looking for the audio to pass over USB, I think XLR would be the way to go. I also don¡¯t love the idea of the built in cable as others have noted.
>
>
>
> Can anyone recommend a pair of mics that sound good, can use either no power or power from the Tascam or a USB-C power connector and XLR if possible. The Tascam X8 does have a 1/8¡± (3.5mm) line-in jack but not sure how well that will work.
>
>
>
> Ok, enough from me. Thank in advance for your thoughts.
>
>
>
> 73 Eugene W2HX
>
> Youtube Channel:
>
>
>
>



--
- - - - - - - - - - - - - - - - - - - - - - - -
David Pinnegar, B.Sc., A.R.C.S.
- - - - - - - - - - - - - - - - - - - - - - - -
+44 1342 850594






Re: Primo EM200 + simple P48

 

Nick Roast:
Not as as selling ploy but just for information, although the EM200 and EM204 are end of line, we do have quite a good stock of each type, in terms of DIY quantities.
I'm told that the EM258 is also out of production. Here's an except from an email from someone at Primo when I was asking about bulk orders last year:
We have other models that perform similar, to recommend.? EM358 or EM419 are replacement options to consider.

Is this a one-time purchase or do you plan to make and sell a multiple finished product to the public in the future?? If this is a one-time order, we still have stock available of the?EM258?that we could sell, but only as a last time buy.? A bulk purchase would be full box quantity of 500pcs.
Though of course there may be enough of them still floating around for them to be available for DIY stuff for years to come.


Re: Simple set up for concert recording?

 

Hello, Eric. This is VERY informative for a newbie like myself. Yes, I do want to record good bass, something that those cheap pencil mics I used definitely lacked. Your comment about the omni directional was very interesting (and the lack of real bass response at a distance for the condensers). I am now considering using two different mics on the stand and then mixing in post.

One mic I have recently been researching is the AT2035 which is directional. You mentioned the 3031 which may be similar in audio quality but omni. I was hoping that it being a large(r) diameter condenser that it might be better on the low frequencies, but perhaps not - based on your message. What about a directional dynamic mic? Might that be useful in conjunction with a condenser? I will have to research my Tascam X8 to see if I can turn on the phantom voltages for some ports only (condenser) and not all ports (dynamic).

I might have to give up the stereo ability if I use two different mics. Or maybe still a pair of mics for stereo and a third mic for its better bass response. But alas, that might be getting too complicated...

Thanks again

73 Eugene W2HX
Youtube Channel:?


From: [email protected] <[email protected]> On Behalf Of eric benjamin via groups.io
Sent: Wednesday, November 8, 2023 5:15 PM
To: [email protected]
Subject: Re: [MicBuilders] Simple set up for concert recording?

I have no experience with those particular microphones. But there is a general problem with the low-frequency response of cardioid microphones. Theytend to have a free-field response that begins to roll off below about 150 Hz. Proximity effect gives a compensatory LF boost. As an example, I have several Audio Technica AT3031s.? AT?specs them as having a response that extends down to 30 Hz. But there is a footnote stating that the measurement is at 12 inches. At that distance the proximity effect begins below 174 Hz. It's actually more complicated than that. But the net result is that the microphone is quite flat down to low frequencies when it is placed 12 inches from the source but it is down many dB at low frequencies when it is 20 feet from the source, as it would be when used in a concert recording.
So how to get the low frequency response that you desire? The simplest answer is to use an omnidirectional microphone. The Audio Technica omnidirectional microphone equivalent is the AT3032 and it has no attenuation at 30 Hz. Unfortunately spaced omni microphones do not give great?stereo recordings.
An alternative method would be to use equalization in the form of a shelf filter to compensate for the LF loss in the microphone. I can't?give a very good recommendation for how much boost to use.


Re: Simple set up for concert recording?

 

I have no experience with those particular microphones. But there is a general problem with the low-frequency response of cardioid microphones. Theytend to have a free-field response that begins to roll off below about 150 Hz. Proximity effect gives a compensatory LF boost. As an example, I have several Audio Technica AT3031s.? AT?specs them as having a response that extends down to 30 Hz. But there is a footnote stating that the measurement is at 12 inches. At that distance the proximity effect begins below 174 Hz. It's actually more complicated than that. But the net result is that the microphone is quite flat down to low frequencies when it is placed 12 inches from the source but it is down many dB at low frequencies when it is 20 feet from the source, as it would be when used in a concert recording.
So how to get the low frequency response that you desire? The simplest answer is to use an omnidirectional microphone. The Audio Technica omnidirectional microphone equivalent is the AT3032 and it has no attenuation at 30 Hz. Unfortunately spaced omni microphones do not give great?stereo recordings.
An alternative method would be to use equalization in the form of a shelf filter to compensate for the LF loss in the microphone. I can't?give a very good recommendation for how much boost to use.


Re: Simple set up for concert recording?

 

I use a Sanyo Xacti ICR-XPS01M but these are as rare as hens' teeth
and have also used a Tascam DR40 both to great effect.

Separate mics need mic stands and setting up, which isn't particularly
audience recording friendly.

AKG D202s are great as are the D200s. The D224s aren't as robust.


For pencil mics Takstar CM60 are excellent but need phantom power.

I've really moved to ribbons but possibly too fragile for your application.

Best wishes

David P

On Wed, Nov 8, 2023 at 2:48?AM W2HX <w2hx@...> wrote:

Hello, I am a new member and a newbie to recording.



I am looking to create a simple, transportable set up to record live rock/jam band concerts from the audience without access to the soundboard. I purchased a Tascam Portacapture X8 and I have been learning the ins and outs. My first attempt for microphones were these low-cost pencil mics from amazon: I used them and found that the sound was pretty awful, even for a novice. They were very thin sounding and lacked bass.



I am looking to this group for a recommendation on a pair of mics that would be more suitable for this purpose (loud concerts recorded from the audience). I think they should be directional, but I am not wedded to pencil or booms, unless the folks here think those are the right solutions. My budget is about $200 per mic but happy to spend less if I could or could stretch a bit if necessary.



I did look at the Sennheiser MKE 440 as the sound seemed really good. What I don¡¯t love about it is that it needs its own batteries. I would prefer something that could use the phantom power of the Tascam (or no power if dynamic) or USB powered, but I am not looking for the audio to pass over USB, I think XLR would be the way to go. I also don¡¯t love the idea of the built in cable as others have noted.



Can anyone recommend a pair of mics that sound good, can use either no power or power from the Tascam or a USB-C power connector and XLR if possible. The Tascam X8 does have a 1/8¡± (3.5mm) line-in jack but not sure how well that will work.



Ok, enough from me. Thank in advance for your thoughts.



73 Eugene W2HX

Youtube Channel:



--
- - - - - - - - - - - - - - - - - - - - - - - -
David Pinnegar, B.Sc., A.R.C.S.
- - - - - - - - - - - - - - - - - - - - - - - -
+44 1342 850594


Re: Capsule damage during soldering

 

The hole also means the diaphragm can stay cooler than the rest of the capsule, in case the metal jig gets warm

On 8 Nov 2023, at 18:14, Casey via groups.io <mbuilders@...> wrote:

?Thanks -- but in the jig he posted it looks like you set the capsules in the slots and then put the enclosing piece in place, i.e. you're not pushing them into the hole? Maybe just to make it easier if you don't feel like taking the jig apart to swap out capsules?

On 11/8/23 10:08, jack wrote:
So the diaphragm isn¡¯t pressured when you insert the capsule into the hole
On 8 Nov 2023, at 17:50, Casey via groups.io <mbuilders@...> wrote:
?Thanks! Why do the jigs always have smaller holes through the bottom? I could see it making sense in a blind hole situation so the part would slide in and out without air compression/rarefaction, but why in a jig like that?

On 11/8/23 05:42, Nick Roast wrote:
This is the jig and heatsink we use for soldering 10 mm capsules. The loose piece is held in place with elastic bands to keep the capsules steady and in good thermal contact with the sink. We have been using lead free solder for many years, its not as shiny and can often look like a dry joint, but it has been problem free.







Re: Simple set up for concert recording?

 

¿ªÔÆÌåÓý

Dow, et. al.? Thanks very much for your suggestion, I find it very interesting. I think what I got from your suggestion is perhaps I should consider two different mics instead of two of the same mics. Maybe one that gives better bass response and one that gives better treble response and then I can mix them later. It does appear that the bass drum mic in that kit is designed for the lower frequencies.

?

Thanks for the suggestion. More to think about!

?

?

73 Eugene W2HX
Youtube Channel:?

?

From: [email protected] <[email protected]> On Behalf Of Dow Fereday via groups.io
Sent: Wednesday, November 8, 2023 11:51 AM
To: [email protected]
Subject: Re: [MicBuilders] Simple set up for concert recording?

?

Hi

Ive noticed a TASCAM set of 4 drum mics, 2 dynamic and 2 capacitor (48V)?

for ?160?

thought they might work well with your recorder you'll need a stereo bar but the kit comes with 2 mic clips

is your recorder able to record 4 channels at once? have you tried the onboard mics?

you'll also need 2 or 4 xlr leads

if you dont like the sound of the dynamics you could?

allways sell them on

but test them out?at a very loud concert first

?

All the best

Dow Fereday

LTS Studios UK


Re: Capsule damage during soldering

 

Thanks -- but in the jig he posted it looks like you set the capsules in the slots and then put the enclosing piece in place, i.e. you're not pushing them into the hole? Maybe just to make it easier if you don't feel like taking the jig apart to swap out capsules?

On 11/8/23 10:08, jack wrote:
So the diaphragm isn¡¯t pressured when you insert the capsule into the hole
On 8 Nov 2023, at 17:50, Casey via groups.io <mbuilders@...> wrote:

?Thanks! Why do the jigs always have smaller holes through the bottom? I could see it making sense in a blind hole situation so the part would slide in and out without air compression/rarefaction, but why in a jig like that?

On 11/8/23 05:42, Nick Roast wrote:
This is the jig and heatsink we use for soldering 10 mm capsules. The loose piece is held in place with elastic bands to keep the capsules steady and in good thermal contact with the sink. We have been using lead free solder for many years, its not as shiny and can often look like a dry joint, but it has been problem free.




Re: Capsule damage during soldering

 

So the diaphragm isn¡¯t pressured when you insert the capsule into the hole

On 8 Nov 2023, at 17:50, Casey via groups.io <mbuilders@...> wrote:

?Thanks! Why do the jigs always have smaller holes through the bottom? I could see it making sense in a blind hole situation so the part would slide in and out without air compression/rarefaction, but why in a jig like that?

On 11/8/23 05:42, Nick Roast wrote:
This is the jig and heatsink we use for soldering 10 mm capsules. The loose piece is held in place with elastic bands to keep the capsules steady and in good thermal contact with the sink. We have been using lead free solder for many years, its not as shiny and can often look like a dry joint, but it has been problem free.




Re: Capsule damage during soldering

 

Thanks! Why do the jigs always have smaller holes through the bottom? I could see it making sense in a blind hole situation so the part would slide in and out without air compression/rarefaction, but why in a jig like that?

On 11/8/23 05:42, Nick Roast wrote:
This is the jig and heatsink we use for soldering 10 mm capsules. The loose piece is held in place with elastic bands to keep the capsules steady and in good thermal contact with the sink.? We have been using lead free solder for many years, its not as shiny and can often look like a dry joint, but it has been problem free.