On 12/28/10 2:31 AM, Per Jensen wrote:
I have a viewfinder from a seventies video camera i purchased at a flea
market, the camera is gutted, and i am left with the VF, and seperate
unit, running on 12 volts and takes composite video. It's an JVC unit
like this:
http://buy.id.ebay.com/buying/id/display/250707923511_JVC-Camera-Electronic-Viewfinder-CVF503-NEW
I just wanted to draw up an schematic, but i don't know what sits inside
a big white potted "box" - presumably some kind of high voltage tripler
circuit. I have about 1000 VAC going into it and around 5 KV on the EHT
suction cup.
Anyone have a general schematic for one of these 1,5 - 2" CRT
Viewfinders and would like to share ?
I bought a couple Panasonic viewfinders like that with the 40mm CRT. The
high voltage module has a multiplier in it. I carved away the red
silicone insulating form open and looked at it - I think it held at
least six diodes and ceramic disc capacitors.
I can look for any documentation I might have.
--
David Forbes, Tucson AZ
http://www.cathodecorner.com/
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