Re: How do I modify this TV to use with PONG?

it looks like a live chassis you will need to isolate it!!
  ----- Original Message -----
  From: Matt Rossiter
  To: rasterlist@vectorlist.org
  Sent: Wednesday, August 27, 2008 3:30 PM
  Subject: Re: RASTER: How do I modify this TV to use with PONG?

  Thanks John,

  Hopefully I can get a few pointers from this group on how to bias those transistors because I'm not exactly sure myself.

  Q204 from http://games.rossiters.com/manuals/Pong/TV-Schematic.jpg (Highlighted in Blue)
  B=2.45v
  C=55.5v
  E=1.89v

  Q408 from http://games.rossiters.com/manuals/Pong/Video-IF-Module.jpg (Highlighted in Blue)
  B=2.81v
  C=14.43v
  E=2.16v

  Would I be able to bias those transistors using one of these models? http://web.telia.com/~u85920178/begin/bias-00.htm
  Obviously I would have to figure out the values for the resistors.

  -----

  "You want to insert the signal at the base of Q408 (second schematic) after disconnecting the "Tank" (L407). You MUST have a line isolated monitor/TV, and I am not sure how to bias the base of Q408 correctly - you need to research that a bit!

  For the first schematic you want to again insert the signal to the Video Amp - Q204 on that page. Again the Base bias needs to be set correctly..."

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Received on Wed Aug 27 02:05:26 2008