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Type: Posts; User: Eightbysix

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  1. The video ram chips (F7 & F8?) aren't in sockets....

    The video ram chips (F7 & F8?) aren't in sockets. I worry about de-soldering them. if it's an essential next step I'll do it, but is there something else I can try first?
  2. So i checked chip G5-pin3 and was getting 8MHz. I...

    So i checked chip G5-pin3 and was getting 8MHz. I was surprised at the voltage range though, it looks like approximately +- 1v, and I was expecting +-5v
    Here is the trace, in case I'm reading it...
  3. So I got the oscilloscope, I read the book - I...

    So I got the oscilloscope, I read the book - I need something to sample now.
    What would you guys recommend I check first?
    Is there a schematic for this model (3008) that I can use to make educated...
  4. I have a friend who restores old arcade games who...

    I have a friend who restores old arcade games who tells horror stories about discharging old CRT tubes, so happy to delay that for now - but thanks for the details Dwight.


    Brightness adjusted -...
  5. Thread: Hello!

    by Eightbysix
    Replies
    3
    Views
    334

    It's a 3008 - details on this thread...

    It's a 3008 - details on this thread. I posted some new info, but it either hasn't been moderated yet, or I messed it up when posting (is there a way to tell?), in which case I'll do it again...
  6. Thread: Hello!

    by Eightbysix
    Replies
    3
    Views
    334

    Hello!

    Hi,

    Thought I would introduce myself. Had a Vic 20 for my first computer - I must have been around 10 years old. Fond memories of playing Snake Pit which I've since dug out on an emulator, and...
  7. That's a very kind offer, thankyou. I had a go at...

    That's a very kind offer, thankyou. I had a go at fixing it however and even though I do say so myself, it's not a bad job.
    56686

    I put the chip back in, applied the pencil-under-the-video-board...
  8. PET 3008. Father/Son repair project. Display looks like a maze.

    Hi,

    Many years ago, I got a 3008 from a car boot sale. It worked at the time although I remember having to wedge something under the screen to get it to display ;). It went up into the loft and...
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