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Re: Machine Gun microphone

Subject: Re: Machine Gun microphone
From: "Michael Oates" msohooates
Date: Fri Sep 7, 2007 10:45 am ((PDT))
Hmmm, Not sure if I want to go ahead with this if I am going to get lots of=
 the spectrum
missed in the recording. The way I would build it, it would not be cheap. I=
f I start to
add up all the extra bits apart from the tubes, =A3200 is a more likely fig=
ure, so not
exactly cheap just to try! And it would take a few weeks to make.

I would like to hear from someone who had had some success with this type o=
f microphone,
especially if comb filter effects can be avoided. This could be the reason =
why information
on this type of mic is hard to find and is widely being used.



>I have had one of these since the 1970s. Built it from plastic
>piping, and was never happy with the performance, but it does work.
>It was the original shotgun microphone for those with little money.
>Mine was originally built for a limited spectrum of sound with quite
>a few fewer tubes than the project you plan. They are a fun project
>if you want to try one. I'd be interested in how your project turns
>--- In  "Michael Oates" <>
>> Has anyone every made and used a machine gun microphone. There is
>> much about these on the internet, but I have found this:
>> I am concidering making one using 90 tubes of 8mm diameter
>> tube with lengths from 1m down to 9mm. (That is two more rings of
>> tubes than shown on the example making it 88mm diameter instead of
>> 67mm) I was thinking of fitting a Rode NT1A as the condenser mic.
>> I really want to know if anyone has tried such a beast. Based on
>> length of tubes I would use, it should work from about 150Hz to
>> range and appears to be very directional.
>> My idea of using more tubes that in the example it to fill in the
>> gaps in the frequency range, but I don't know if that's needed.
>> Cost would be about =A3120 for the tubes plus a bit more for for
>> fitting some windshield around it with fake fur on a wire frame
>> former covering the full length.
>> Thanks,
>> Mike

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