Scart Plugs

Discussion in 'Home Cinema Building DIY' started by sounddog, Mar 16, 2003.

  1. sounddog

    sounddog
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    Anyone know what I can get decent scart plugs for ... all anyone seams to sell are cheepie plastic bodied things.

    Second question ... for RGB SCART cable ... am I correct I need 4 75ohm cores ... one each for RGB plus the composite connected for Sync?

    Thanks

    Vikki
     
  2. Flimber

    Flimber
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    CPC: metal-bodied, gold-plated, £1.56, IIRC.

    HTH,

    Mike.
     
  3. groundy

    groundy
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    The CPC plugs are quite nice - look exactly like the ones Russ Andrews uses. If you want something more, you can also buy the QED, IXOS or Supra plugs, all around £10 each.
     
  4. lynx

    lynx
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    Mike, what one are you refering to ? The only one i could see was a made up cable at £10.52 ( see image ).
    [​IMG]
     
  5. groundy

    groundy
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  6. sounddog

    sounddog
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    Thanks for the pointer to the CPC plugs ... can anyone confirm I am correct with wiring needed for RGB (no audio) is 1 coax for each of RG & B plus 1 for composite (for sync)?

    Thanks
     
  7. groundy

    groundy
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    That's correct but don't forget the ground wiring. You need to wire as follows:

    Pin 5 Blue Ground
    Pin 7 Blue Signal
    Pin 9 Green Ground
    Pin 11 Green Signal
    Pin 13 Red Ground
    Pin 15 red Signal

    Pin 17 Composite (Sync) Ground
    Pin 20 Composite (Sync) Signal.

    You can wire in a switching voltage to Pin 8 if you want auto-av selection and you may need a small voltage on Pin 16 to force RGB unless you can put the display device into RGB mode manually.

    Pin 8 is "Function Select". When it's voltage is between 0 and 2V (DC) the TV is in TV mode. When it is between 5 and 8V the TV goes in to widescreen mode (if applicable). If it is between 9.5 and 12V the TV goes in to AV mode.

    Pin 16 is "RGB control". When its voltage is between 0 and 0.4V the AV mode displays the signal on the Composite Video pin (pin 20). When it's voltage is between 1 and 3V the AV mode will display the R,G,B signals.

    The input impedance on Pin 8 is around 10k ohms and the input impedance on pin 16 is 75 ohms so you may need to terminate with appropriate resistors.
     
  8. sounddog

    sounddog
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    So ... assuming good soldering, etc. ...

    Has anyone compared a good pre-wired SCART cable (i.e. a QED Squart) to one wired with (for sake of example) Van Damme Red Series 75ohm 4 core cable or individual Van Damme 75ohm cables for each core?

    Thanks
    Vikki
     
  9. Jason S

    Jason S
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    Not made a complete cable up, but did build a convertor / adaptor to connect to a good quality scart lead / games console.

    http://80.3.184.41/images/RGB.JPG

    The cable I used is some 75ohm coax I got from maplin, and the socket came from ARD. If I can find a better plug I'll swap it over. Phono's are gold plated from Maplin. Total cost was probably around a tenner.

    The initial reason I built this was to connect my XBox console via my Amp (for video switching), but could see other uses for it too,after I'd built it.

    But, before you start, consider will the cable fit the plug, RGB +Sync is 4 cores, if you need switching as well thats another 1or 2 cores. I could only just fit the 4 cores used into the socket I used, and I had to modify the socket to achieve that. Also, how good is your soldering, it's tight in that socket, and the quality of solder joint can make all the difference.

    The quality is easily as good as that of the cables I've bought from Keene, (RGB + C breakouts for DVD, NTL etc). But... I've had to modify the pre-bought cables to carry pin 16 as well as my TV will not allow me to hard set RGB :(

    Had a bit of a cable building thing going on this weekend creating 3 mains cables at the same time, whic hwas a surprisingly worhtwhile effort!
     
  10. powlest

    powlest
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    I find these plugs to be very good indeed, need flat cable mind :)
     
  11. Flimber

    Flimber
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    How "flat" ?

    Mike.
     

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