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  • en Telephone pulse to DTMF converter

    Description: During a visit to the local recycling station I stumbled over an old GNT-A F68 telephone, and it was a bargain I could not say no to. When I...
  • en PH3 phono amplifier

    Description: My brother decided that now was the time to join the world of vinyl records and then needed a phono amplifier. We looked at different alternatives and ended up with...
  • en High voltage powersupply

    Description: For a long while my brother and I have missed a high voltage power supply for testing of eg. vacuum tube constructions and now we have finally build one. This...

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