now in the 48" class we are talking about cooking lunch and exploding
eggs. I expected someone to stop in with a 6' dish cooking pizza but
no one has yet. Maybe another one of those many lurkers that won't
admit it. :)
Rich
--- In Lang Elliott <>
wrote:
> Well, then maybe that's why I chose to mount my mike elements at
5.5". I
> think I asked Klas some time ago and then adjusted my design to be
close to
> the point of focus.
>
> In the event he does not get back to your by dawn. Point the dish
at
> the sun and use a small piece of paper to find the focus. The answer
> is about 5.5". btw the telinga can set the paper on fire on a sunny
> day.
>
>
> --- In Lang Elliott <>
> wrote:
> > Klas:
> >
> > If you're listening, can you tell me again where the focal point
is
> for your
> > current Telinga parabola?
> >
> > Lang
> >
> > Mine are set in a bit because that was necessary given the setup I
> created.
> > However, if I make the receiving tube longer and glue a rubber
> gasket inside
> > to hold the rear of the mikes firmly, I could certainly extend
them
> out to
> > the edge of the parabola. I'll probably do this for the coming
> season.
> >
> > Lang
> >
> > 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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