[amsat-bb] Re: DIY: Parabolic mirror
Greg D.
ko6th_greg at hotmail.com
Sun Aug 17 11:39:48 PDT 2008
That's the idea, though "DIY" is just a little bit of a stretch... :-)
Greg KO6TH
----------------------------------------
> Date: Sun, 17 Aug 2008 14:27:59 +0200
> From: amvm at skynet.be
> To: ko6th_greg at hotmail.com
> CC: amsat-bb at amsat.org
> Subject: Re: [amsat-bb] Re: DIY: Parabolic mirror
>
> http://medusa.as.arizona.edu/lbto/tech/mirror.htm
>
> Greg D. schreef:
>> 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
>> garage...
>>
>> Greg KO6TH
>>
>> (*) 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
>>> merit.
>>>
>>> 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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>>
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>
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