My Pocket Sized NBTV Reciever
Posted: Wed Oct 18, 2017 5:25 am
This is my crude attempt at creating a "portable" mechanical NBTV receiver; I got the Idea while messing around with an 80mm pc case fan, when I had and idea oh how I should complete my quest for a working mechanical television (Yes, this is my first semi-working set). I used an 8cm mini camcorder DVD as my template over a piece of black construction paper, and punched 32 holes with a screw driver. The disk turned out pretty well for me just eyeballing it, but the image it produces is far from perfect. It does not help that the disk is not even very centered. I used a bulb from an old strand of Christmas lights, and made a crude amplifier with some parts I de-soldered from an old AM/FM receiver. With low hopes (after my 12 other attempts at mechanical television) It gave me a distorted image. Since I am not willing to pay for a fan controller, I used a variable resistor to manually control the fans speed. Excited, I jammed the radio into the case of the old AM/FM radio I built the amp from. I am planning on making a proper Nipkow disk by using some plastic from a DVD case, and drilling holes with a proper template. I also want to replace the current amp with a more responsive two transistor amplifier. The last improvement I want to make is adding a speaker that hooks up to the left stereo channel for sound. If there were any actual American NBTV broadcasters, I would implement some sort of short wave receiver into my design to pick up like NBTV.