when you have side wind hitting the dish, which you always have when
pointing up into the sky, there will be strong turbulence in the dish.
A base filter must be used before the first input transistor,
otherwise it will cause severe distortion, OR a piece of cloth
working as a wind shield, covering the entire opening of the dish.
At 21:05 2012-09-20, you wrote:
> > Hi all =AD interesting discussion =AD I=B9ve used friends=B9 parabolas=
> and have been
> > considering trying to rig up a home-made version as well.
> > a few questions...avocet wrote:
> > =B3Always use a maximum bass roll-off - you can put the bass back later
> > if necessary.=B2
> > I=B9m wondering how you=B9d do this ? Why wouldn=B9t you roll off the b=
> > post-recording instead? I really don=B9t see how you could simply =8Cpu=
> > bass that was never recorded...not meant as a criticism, necessarily =
> > more that I=B9m intrigued by this statement, particularly as your (avoc=
> > posts seem to indicate an incredible depth of recording-related knowled=
> > also =AD it seems to me that the material used to construct the
> parabola would
> > have an impact on the sound =AD would the plastic or nylon surface of a=
> > umbrella dampen/muffle the sound at all ? I was trying to figure
> out a way to
> > coat the surface with something more reflective, but wonder if it=B9s t=
> > necessary ?
>"While a picture is worth a thousand words, a
>sound is worth a thousand pictures." R. Murray Schafer via Bernie Krause.
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