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Re: Lang's Telinga Stereo Setup

Subject: Re: Lang's Telinga Stereo Setup
From: Walter Knapp <>
Date: Tue, 04 Mar 2003 10:10:05 -0500
Lang Elliott wrote:
> p.s. I do have the current dish. I thought Klas told me the focal point is
> even with the front of the dish, which would be about 6" out. Is this
> correct?

I just went and measured, instead of trying to do it from memory, should 
have done that to start with. I was wrong about the distance. Front edge 
of my dish is between 6 & 6 1/2" And my stereo mic is set with the tip 
even with that plane right now, though I usually have the tip a slight 
bit out. Your photos make the dish look flatter, which is why I reacted. 
 From the photos your mics look closer in than mine. Since I have 
MKH-20's I could estimate how far out your's really were.

> Lang
> 
> Mine is currently set at about 5.5". Perhaps I should move it out a bit.

I worked mine out based on listening, it's fairly easy to tell. The 
Perfect distance depends somewhat on just how far away things are. There 
is a range of a inch or two. I have worked with the tip as far out as a 
inch or so beyond the dish, and sometimes somewhat inside. Particularly 
if working fairly close louder stuff I get better sound if I defocus 
slightly.

Depending on just how far in the mic elements are in the foam I might 
even have the actual mic elements closer than yours.

I think I must have confused the measurement with my 30" dish.

Comes from spending the evening digging the brushes out of my Ranger's 
alternator, a very annoying task. Otherwise I'd be out on another frog 
foray now. I'm delayed by a day on account of that. Small lump of carbon 
not doing it's job suddenly.

Walt




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