[amsat-bb] Re: DIY: Parabolic mirror
ko6th_greg at hotmail.com
Thu Aug 14 22:04:30 PDT 2008
Best "form" is probably not to have one. Wasn't there a post recently talking about making a mirror by spinning casting resin in a shallow round dish? Perhaps a good use for that old record (*) player gathering dust in the
(*) an ancient mechanical instrument for storing music in an analog form
> Date: Thu, 14 Aug 2008 15:59:26 -0400
> From: ka2pbt at arrl.net
> To: amsat-bb at amsat.org
> Subject: [amsat-bb] Re: DIY: Parabolic mirror
> agree ..... what would be a good form to start with rather than the bottom
> of some random water tank??
> Assuming you had a proper form ... I think the construction process has
> The next step would be to coat the fiberglass shell with something metallic
> ... foil ... screen ????
> On Thu, Aug 14, 2008 at 2:04 PM, Franklin Antonio wrote:
>> At 07:34 AM 8/14/2008, Joe wrote:
>>> Too bad it's not parabolic, and probably far from even spherical.
>> Precisely. Apparently the author thinks "parabolic" just means some kinda
>> symmetrical concave surface.
>> This guy obviously isn't an antenna guy.
>> I've found Make magazine to be a crock in general. Too bad.
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