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August 11th 03, 09:38 AM
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"John Miles" wrote in message ... In article , says... Very nice construction on the little TV conversion to display on your website! :-) No kidding. I've bugged Hans a lot about how he really should be doing all that work with a Mini-ITX PC motherboard, but all kidding aside, that project is what "homebrewing" is really all about. Thanks guys. John, the sci.electronics.repair folks didn't have anything to say about it :-( Someone else thought the series LC from the driver transistor's emiter to ground might be a "colour killer" and putting a notch in the frequency response of the driver at about the same frequency my 320 pixels are at (4MHz). I tried shorting the L altogether and there was no visible difference on the display. That same person also mentioned gamma of the tube, but I don't know much about that. I would find it hard to believe that the tube itself was the limitation here, it must be the video driver. Interestingly the fading at the top of the screen dissappears when the "brightness" control is turned up, but that makes the bulging noise floor worse and also dims thin vertical lines even more. Arrgh. 73 Hans G0UPL |
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