hH? - rediffusion


The Convertor-Box Circuit

We are currently developing a DIY converter for viewing Rediffusion Cable TV. Below are images of the original converter circuit.

Track Side of PCB Component Side of PCB


Below is an abortive experiment on how to completely cock up 'interpreting' the conversion circuit... 

 + _____________________________________________
     |     |          |       |      |
     |     |         _|_      |     _|/
     |     |         | |   L1 3     _/_
     |     |         |_|10k   3     /|10pf
     |     |          |       |      |
100nf|   + |10uf      |       |------|------------o O/P (with ref. to 0V)
    _|_   _|_  _______|_____|/      _|_
    ___   ___  |      |BC109|\      ___
     |     |   |      |       |______|4.7pf
     |     |   |330pf |       |
     |     |  _|_    _|_     _|_    ____   10nf
     |     |  ___    | |     | |<--|____|---||--- o
     |     |   |     |_|     |_|1k  200R           \
     |     |   |      |       |                     ><><><><><
     |     |   |      |       |          10nf      /
     |     |   |      |       |      +----||----- o
     |     |   |      |       |      |             |
0V __|_____|___|______|_______|______|__________   |
                                                   |
L1 = 1 turn 1/4" approx.                        O/P+ RF
                                              Transformer

Please note that this is only an experiment and therefore is guaranteed not work to any degree :o)


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Disclaimer: All the info given here is incomplete, there's always something missing. This is basically to cover our own backs, but for someone with a bit of sense it shouldn't be too hard to fill in the blanks. The authors of this page and the carriers do not take any responsibility whatsoever for any action you may carry out as a result of you reading or using this information. Any documentation provided is given for research purposes only.

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