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Cheap, Makeshift Parabolic Dishes?

cx b All Messages By This Member #35800 Hey all - I'm curious if people here have any recommendations for cheap, makeshift parabolic reflectors? I'd like to experiment a bit with the idea, but I'm hesitant to spend $80 on some meticulously curved glass. Are there any interesting alternatives? Thanks!
Ralf R Radermacher All Messages By This Member #35801 Am 13.11.23 um 10:46 schrieb cx b: I'm curious if people here have any recommendations for cheap, makeshift parabolic reflectors? Metal or plastic lamp shades. Ralf -- Ralf R. Radermacher - K?ln/Cologne, Germany Blog : Audio : Fotos :
Nils All Messages By This Member #35803 Plastic squirrel baffles can be used.?
Casey All Messages By This Member #35806 开云体育 In the past, getting old used satellite dishes was the way, but with modern beamforming they aren't always parabolic anymore and so aren't as common these days, not necessarily cheap, etc. If you have time to mess around with DIY creation, you can inflate mylar and back it in various ways to make your own: -c On 11/13/23 01:46, cx b wrote: toggle quoted message Show quoted text Hey all - I'm curious if people here have any recommendations for cheap, makeshift parabolic reflectors? I'd like to experiment a bit with the idea, but I'm hesitant to spend $80 on some meticulously curved glass. Are there any interesting alternatives? Thanks!
Charles Clark All Messages By This Member #35807 开云体育 old satellite dish from dish... Sent using Zoho Mail ---- On Mon,13 Nov 2023 13:05:09 -0500 fotoralf@... wrote ---- toggle quoted message Show quoted text Am 13.11.23 um 10:46 schrieb cx b: > I'm curious if people here have any recommendations for cheap, makeshift > parabolic reflectors? Metal or plastic lamp shades. Ralf -- Ralf R. Radermacher - K?ln/Cologne, Germany Blog : Audio : Fotos :
Casey All Messages By This Member #35808 开云体育 Do you mean the Dish network? Do you know if those are actually parabolic? On 11/13/23 14:47, Charles Clark via groups.io wrote: toggle quoted message Show quoted text old satellite dish from dish... Sent using Zoho Mail ---- On Mon,13 Nov 2023 13:05:09 -0500 fotoralf@... wrote ---- Am 13.11.23 um 10:46 schrieb cx b: > I'm curious if people here have any recommendations for cheap, makeshift > parabolic reflectors? Metal or plastic lamp shades. Ralf -- Ralf R. Radermacher - K?ln/Cologne, Germany Blog : Audio : Fotos :
Charles Clark All Messages By This Member #35809 开云体育 Yes dis network.. I am fairly certain they are parabolic or at least close. I made one into a sun reflector once and it easily focused the sunlight into and area about the size of a ping pong ball. I am confident that is close enough for you to use for a parabolic Mic. if you can find one with its receiver head still in place just mount your Mic on the head pointed to the dish. I am sure it would not take much fiddli g to find the focus point of the dish.? According to net satellite dishes are a bit off from true parabolic but still should focus sound well enough to build a good "parabolic" antenna.? ? ? Now here is something to check out. You could build a true parabolic reflector like this one and place your Mic on a holder separate from the reflector.? ? https://www.popularmechanics.com/science/a21833/diy-parabolic-mirror/? ? ? Just some thoughts... Sent using Zoho Mail ---- On Tue,14 Nov 2023 02:20:52 -0500 mbuilders@... wrote ---- toggle quoted message Show quoted text Do you mean the Dish network? Do you know if those are actually parabolic? On 11/13/23 14:47, Charles Clark via groups.io wrote: old satellite dish from dish... Sent using Zoho Mail ---- On Mon,13 Nov 2023 13:05:09 -0500 fotoralf@... wrote ---- Am 13.11.23 um 10:46 schrieb cx b: > I'm curious if people here have any recommendations for cheap, makeshift > parabolic reflectors? Metal or plastic lamp shades. Ralf -- Ralf R. Radermacher - K?ln/Cologne, Germany Blog : Audio : Fotos :
Michael Chang All Messages By This Member #35840 I made one from my neighbor's discarded parabolic heater that he bought at Costco. The rest was easy.? toggle quoted message Show quoted text On Mon, Nov 13, 2023 at 4:46?AM cx b <clistburnham@...> wrote: Hey all - I'm curious if people here have any recommendations for cheap, makeshift parabolic reflectors? I'd like to experiment a bit with the idea, but I'm hesitant to spend $80 on some meticulously curved glass. Are there any interesting alternatives? Thanks!
cx b All Messages By This Member #35844 Do the dimensions matter? i'm seeing a lot of shapes and sizes... are there simple rules-of-thumb that people use? toggle quoted message Show quoted text On Thu, Nov 16, 2023 at 5:16?AM Michael Chang <lambdaarts@...> wrote: I made one from my neighbor's discarded parabolic heater that he bought at Costco. The rest was easy.? On Mon, Nov 13, 2023 at 4:46?AM cx b <clistburnham@...> wrote: Hey all - I'm curious if people here have any recommendations for cheap, makeshift parabolic reflectors? I'd like to experiment a bit with the idea, but I'm hesitant to spend $80 on some meticulously curved glass. Are there any interesting alternatives? Thanks!
Johan Vandermaelen All Messages By This Member #35845 Size matters. The larger, the better the bass respons will be. This is in direct relationship of the wavelength. E.g. the disc is 68cm diameter: frequencies above 500Hz will have a boost and high directivity toggle quoted message Show quoted text Op do 16 nov. 2023 21:01 schreef cx b <clistburnham@...>: Do the dimensions matter? i'm seeing a lot of shapes and sizes... are there simple rules-of-thumb that people use? On Thu, Nov 16, 2023 at 5:16?AM Michael Chang <lambdaarts@...> wrote: I made one from my neighbor's discarded parabolic heater that he bought at Costco. The rest was easy.? On Mon, Nov 13, 2023 at 4:46?AM cx b <clistburnham@...> wrote: Hey all - I'm curious if people here have any recommendations for cheap, makeshift parabolic reflectors? I'd like to experiment a bit with the idea, but I'm hesitant to spend $80 on some meticulously curved glass. Are there any interesting alternatives? Thanks!
Charles Clark All Messages By This Member #35848 开云体育 Yes it will effect sound quality. But portability might be something to consider. Sent using Zoho Mail ---- On Thu,16 Nov 2023 23:00:41 -0500 clistburnham@... wrote ---- toggle quoted message Show quoted text Do the dimensions matter? i'm seeing a lot of shapes and sizes... are there simple rules-of-thumb that people use? On Thu, Nov 16, 2023 at 5:16?AM Michael Chang <lambdaarts@...> wrote: I made one from my neighbor's discarded parabolic heater that he bought at Costco. The rest was easy.? On Mon, Nov 13, 2023 at 4:46?AM cx b <clistburnham@...> wrote: Hey all - I'm curious if people here have any recommendations for cheap, makeshift parabolic reflectors? I'd like to experiment a bit with the idea, but I'm hesitant to spend $80 on some meticulously curved glass. Are there any interesting alternatives? Thanks!
kennjava All Messages By This Member #35849 Just about any curved "dish" shape will provide some focusing and gain. for common items that would serve as reflectors. Lots of hits if you google "DIY parabolic mic".
Dibutil Ftalat All Messages By This Member #35852 Yes, the size matters. Making a bigger head will improve bass separation but will not reproduce acoustic panorama faithfully. The whole point of the dummy head is to reproduce acoustic character of the real head so that replay matches the resembling spacial phase shifts. Not only the size matter there but density distribution, resonance cavities, impedance of the materials, etc.?
JAMES B All Messages By This Member #35857 https://theelectronicgoldmine.com/products/g20898c?mc_cid=95eb77a4eb&mc_eid=6b88d3e52c

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