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abcpet

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  2. audioguru fm transmitter

    in Electronics chit chat

    Posted

    to mr. Audioguru,
    I want to build this, but I have some questions about it ( how the schematic compares to the picture)

    I see 14 capacitors in the schematic, but I seemed to only counted 13 capacitors in the picture of the completed picture

    I see some bigger power? precision? resistors on the picture. What power rating, etc should they be?

    What do the 2 vari-caps do?
    I'm also really unsure about what capacitors to use.


    Thanks really much

  3. T.V ( No display )

    in Service Manuals

    Posted

    something similar happened on a old CRT TV i had a long time ago. I used it for about 4 years, then the picture went all crazy. For 1 week, the picture would be displayed for some thme (about 30 secs), then the screen was off ( blank ) for about 30 secs. Finally, the screen just went all blank. While this was happening, the sound was alright. Now, the TV is taken apart by me, I salvaged a lot of parts from it :)
    I have no clue why this happens? anyone knows what might cause this?

    I also have a old computer, and there's a problem with the CRT moniter's display. Most of the time, the screen is stretched , the  left + right part of the screen would  be cut-off. A pin was missing from the VGA connecter, but the funny thing about this is 80% of the time when I press hard on the sides, or top of the moniter or just bang it,  the screen on the moniter would fit the screen and not be stretched for a few seconds, to a few minutes. Now its just abandoned.

    Weird, if anyone knows why this happened, its appreciated

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