Hello Richard, Thank you for valuable advices. What diameter was the pipe you made? Vladimir....
17925
Roger
krokavadet
Apr 10, 2012 12:58 pm
Vladimir, I think Onlinecomponents use to have a $100 miniumum order. Roger...
17926
kihava
Apr 10, 2012 4:14 pm
Hello guys! Thanks for a great group! I just got me an MXL 2006 for 70 euros. I found it has exactly the same circuit boards as the MCA SP-1. The capsule is...
17927
kristof Bastiaensen
kuribas
Apr 10, 2012 5:09 pm
... Well, if there is room for improvement, it's always welcome. I did test the circuit with a 0.1ohm resistance, and the response was flat in the audio range...
17928
Sergei Steshenko
sergstesh
Apr 10, 2012 6:22 pm
Can we assume that in such a tube velocity is proportional to sound pressure and the 'k' coefficient: velocity = k * pressure does not depend on frequency in...
17929
ricardo
ricardo_lee
Apr 10, 2012 7:43 pm
... Standard British Drainpipe circa 1980. About 6" Don't make it too small. Is this for a commercial project? Let us know how you get on; especially on the...
17930
Sergei Steshenko
sergstesh
Apr 10, 2012 8:46 pm
Which might be the effect of antialiasing filter before your ADC. Regards, Sergei. ... [snip] ... [snip]...
17931
ricardo
ricardo_lee
Apr 10, 2012 10:03 pm
... There is a dependence on absolute temperature but the dependence on pressure is negligible (apart from the effect of pressure on density which is a direct...
17932
ricardo
ricardo_lee
Apr 10, 2012 10:16 pm
... If it is within 0.1dB at 20kHz and doesn't peak up again at supersonic frequencies, I would say it is beyond reproach. I agree with Sergei that the drop...
17933
David Pickett
kriegerjoh
Apr 10, 2012 11:48 pm
... Perhaps not, but it would still be excellent value for €220! David...
17934
Sergei Steshenko
sergstesh
Apr 11, 2012 6:51 am
I saw the 'k' coefficient nowhere, I just asked about proportionality which seems intuitive to me. My point is that we don't care about the exciter (speaker...
17935
kristof Bastiaensen
kuribas
Apr 11, 2012 10:05 am
... I measured my ribbon (2.5 micron) at 0.15 ohm, so just a little more that the 0.1 ohm I used for testing. The frequency response is within 0.5db, that's a...
17936
ricardo
ricardo_lee
Apr 11, 2012 1:33 pm
... Figs 10.8 & 10.9 in section 10.4.2 of the Clio Manual is a typical impedance curve of a bass unit measured probably in free air. You see the bass...
17937
migrason
Apr 11, 2012 1:39 pm
Hello to all I recently purchased a used Karma K6 active ribbon mic for 50$. At that price, i figured i could'nt go wrong. I'm finding that it distorts way too...
17938
Sergei Steshenko
sergstesh
Apr 11, 2012 4:09 pm
Why ? Suppose we have two parallel infinite walls, and in one of them "half-infinite" diameter driver is installed. Our observation point is on the driver...
17939
bluejinn
Apr 11, 2012 8:35 pm
... I have the same microphone. I plan to do the zapnspark direct connect mod, and change capsule. I have a few spoken word voice takes for an A/B comparison....
17940
Bilbal
bilbal44
Apr 11, 2012 8:44 pm
KitsRUs Kit 98 Preamplifier ( www.kitsrus.com/pdf/k98.pdf ) is a possibility for a mic. head amp. Does anyone have any ideas for component substitution to make...
17941
Eric Benjamin
ericbenjamin2
Apr 11, 2012 8:49 pm
Just to fuel this discussion, I have the following from a personal communication from Joerg Wuttke: at SCHOEPS ... Obviously this was a rather intense...
17942
ricardo
ricardo_lee
Apr 12, 2012 12:48 am
... OK. "Plane Wave" is perhaps not the best description of what we are trying to achieve. Maybe "free field" but even that is open to misinterpretation. ...
17943
ricardo
ricardo_lee
Apr 12, 2012 1:01 am
... Sheesh! That's twice as long as I thought he had. And 3x as long as mine. I got best results stuffing the whole tube and quite firmly except for the...
17944
Eric Benjamin
ericbenjamin2
Apr 12, 2012 4:00 am
E. Benjami wrote:> > have a tapered wedge as I have seen described in various publications? Ricardo wrote:> Have you ever tried to make a tapered fibreglass...
17945
Sergei Steshenko
sergstesh
Apr 12, 2012 6:28 am
I think we should rather use "running wave generator" term - to emphasize the point that there are no standing waves involved. Regards, Â Sergei....
17946
kihava
Apr 12, 2012 6:52 am
... Please report back on the mods when you have them done!...
17947
LESLIE WATTS
wattsfurniture
Apr 12, 2012 10:53 am
The minimum 1/4 wavelength tapered wedge end termination is what we had IIPC. Wedge was metal "hardware cloth" welded to wedge form and stuffed with glass...
17948
sy@...
mel.famie
Apr 12, 2012 12:21 pm
Ribbons can be fragile- is the ribbon stretched or torn? Crap in the gap? I'd definitely look mechanical first before starting to change electronics....
17949
Keith
keithtcary
Apr 12, 2012 3:59 pm
Before getting too complicated I'd check that the ribbon isn't touching the magnets. You may need to use a magnifier. We're hopefully dealing with pretty close...
17950
ricardo
ricardo_lee
Apr 12, 2012 5:28 pm
... I started with "end termination" and when that proved wonky, just stuffed it until things got better by which time, nearly the whole tube was stuffed. ... ...
17951
LESLIE WATTS
wattsfurniture
Apr 12, 2012 6:51 pm
... From: ricardo To: micbuilders@yahoogroups.com Sent: Thursday, April 12, 2012 1:28 PM Subject: [micbuilders] Re: Pipe as planewave generator ... Bruce...
17952
vladimir_godyna
Apr 12, 2012 7:33 pm
It's noncommercial project. Ordered Visaton W100 as speaker....
17953
migrason
Apr 13, 2012 2:00 pm
I had'nt thought of that possiblity. I will look into the dirt situation...with surgical gloves. Thanks for your replies....
