It will be interesting to know what you find with your tests, Rich.
I'm wondering if the "no noticeable decrease in gain with a barrier"
effect is particular to less-rigid dish materials. Because the dish
warps under its own weight a bit the focus also becomes somewhat
warped or stretched, thus the gain at any specific point is already
compromised. A barrier might make up for this a bit by obstructing
the diffusion or by offering a pressure zone.
Based on this conjecture, would you say I'm on - A:) good caffeine,
or B:( Bad caffeine?
-John Hartog
--- In "Rich Peet" <>
wrote:
>
> I will put this on this list as non-pay test project 34.
> I have a hard time understanding how the gain would be the same in
> this test. I would expect something more of a gain drop, and it
> having a frequency component to the loss in gain. Thinking 11db
drop
> on my dish.
>
> The more important issue I need to test and understand is the
behavior
> of the physical space of an certain frequency amplified wave by a
> parabolic. I am hearing that people don't think that a barrier will
> allow a dish to see only half a dish and I will look into that.
>
> Thanks for helping define the issue. Back to working #32 within the
void.
>
> Rich Peet
>
>
> > > But the design had a baffle seperating the two mics as in your
link.
> > > Phil
> It did use a barrier between the mics. The
> > design does work without a barrier, though with a somewhat
different
> > sound. Gain is pretty much the same with or without a barrier.
> >
> >
>
> ....
>
> > Walt
> >
>
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