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Re: DIY: Parabolic mirror




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@skynet.be
> To: ko6th_greg@hotmail.com
> CC: amsat-bb@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@arrl.net
>>> To: amsat-bb@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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