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theo wrote:On our NBTV site I cannot find any information - or other people - how had done some experiments, on and with a ‘Jeffree Cell’ originally used in the (mechanical) video projector from Scophony. The fact that you can modulate RF frequency’s and thereby make an optical modulation of a light beam, sounds very interesting. Is there anybody out there, how has some experience with the phenomena? Used crystal's ???
theo wrote:On our NBTV site I cannot find any information - or other people - how had done some experiments, on and with a ‘Jeffree Cell’ originally used in the (mechanical) video projector from Scophony. The fact that you can modulate RF frequency’s and thereby make an optical modulation of a light beam, sounds very interesting. Is there anybody out there, how has some experience with the phenomena? Used crystal's ???
theo wrote:Hello Harry. Thank you for the response (I am not looking every day on this site). Nice to see that I am not alone in my interests. Strangely I have this first link, although the content, found elsewhere on the net??? But thanks anyway.
As I understand, you did some experiments on this desing and prefere the Kerr Cel.
Strange, as I understand correctly, the Jeffree must be far supperir to the Kerr.
The delay experiment looks promising and will look in to that myself.
I used that delay line for something completely different. Look at; http://www.theofaberalmere.nl/assets/delayline-vco.pdf design is published in electronics magazines unfortinaly only in Dutch. I always thought that the delay line itself, was glass and reflected the 4.43 wave. The transducers (crystal like) where mounted on the edges. When I tested the several delay lines, I found the bandwith rather large. More that 1MHz. And that must be, otherwise the color-signal will be limited. But that’s an other story all together. Did you ever manage to build a working cel, Kerr or Jeffree???
theo wrote:Harry, again thanks for de response and link’s. I will look into maters and don’t think that heat will be a problem. One side of the transducer will be in the liquid. The Kerr cell is promising, because simple polaroid filters are now day’s available (camera shop). But the use of dangers liquids sound’s less attractive. Keep you posted. First, I have to finish a video program. It will be aired very soon and a lot of edit and researds, still has to be done.
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