"J. Coon" wrote:
> Magic wrote:
> > I've built a pair of DIY mics for doing a bit of recording with my MD..
> >
> > Ok, here's my questions:
> >
> > I know that by increasing the value of the capacitor I can reduce the bass,
> > but is there a way to boost the treble slightly?
>
> If you could point us towards the schematic you are using, it would help.
Ok, I got the GIF.
First let me say that any passive filter attenuates signals, they don't boost them.
The circuit you sent to me is called a high pass filter (Or bass roll off). It
passes frequencies above a certain frequency, determined by the RC time constant.
If you increase the size of the capacitor, you lower the cut off frequency and you
get more bass. if you decrease the size of it, you get less bass.
If you put a capacitor from the mike terminal 1 to mike terminal 2, and replace the
existing capacitor with a resistor, you will have a low pass filter, with little
or no hgh frequencies getting through. I am not recommending that, just used it as
an example. Your beast bet is to fiddle with the size of the capacitor, drop it
from 4.7 uF to half of that, say 2.5 or even less. You will get less bass, and
consequently hear more of the highs.
>
>
>
> >
> >
> > The mic spec. states a power supply range of between 1V and 10V, with 4.5V
> > being the "optimum supply". What difference will runnig the mics on this
> > voltage make, as I am currently using a 9V cell. ?
>
> Do they show a frequency responce curve?
>
> > Final Q, just in case somebody knows... Is there a way to shrink heat shrink
> > tubing without a hot-air gun? I want to make a stick-mic for my MD and would
> > like to encase the capsule and leads, but don't have a hot-air gun
> > (hairdryer wont be hot enough I'm sure!).
>
> A hair dryer will probably work. Alternately, you can shrink it with the
> soldering iron. Just hold it over the heated ironand rotate it like it is on a
> BBQ rotisary. Be careful and don't get it too hot, or touch the iron with it
> or your fingers. <G>
>
> --
> Jim Coon
> mailto:[EMAIL PROTECTED]
> If Gibson made cars, would they sound so sweet?
>
> My first web page
>
> http://www.tir.com/~liteways
>
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--
Jim Coon
mailto:[EMAIL PROTECTED]
If Gibson made cars, would they sound so sweet?
My first web page
http://www.tir.com/~liteways
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