Jadis JS1 DAC OCXO clock upgrade

This week we upgraded the fabulous Jadis JS1 D/A converter.

In this particular case it’s the MKIII version. Both powersupply and D/A converter were upgraded. The digital section was upgraded by an OCXO clock. The 5PPB OCXO clock needs 1 Ampere current by start-up and the digital mainboard of the Jadis couldn’t provide that large amount of current. We had to connect a separate 5V/1A powersupply to the mainboard by a custom made 5.5/2.1 dc-connector.

Of course we upgraded the analog section of the D/A converter as well by replacing the capacitors and replacing the bypass-capacitors in the output-stage. Also all internal signal-wires were replaced by silver/gold wires.
All tubes were replaced: The ECC82 were replaced by Psvane and the 6922 tubes were replaced by 6N23P (NOT the EV-version) tubes.

We also did some upgrading at the Jadis powersupply. The EL84 was replaced by a NOS Philips EL84, a very effective RFI/EMI filter was placed and we put some silver capacitors in the circuit.

And how it sounds..??….well… say no more….
…..one of the best DAC’s I have ever heard !!!

1 thought on “Jadis JS1 DAC OCXO clock upgrade”

  1. Hallo Hans,
    Ik ben zeer tevereden over jouw modificaties aan mijn Jadis set!
    De JD1mkll met grote voeding en dac JS1mklll plus voeding zijn standaard al een superset, maar nu nog een veel groter podium. Iedere digitale vervorming is absoluut afwezig.
    Het klinkt alsof er een absolute top draaitafel staat inclusief een topelement. Een solo-instrument staat tastbaar in de ruimte. Extreem precies wat betreft instrument klankkleur en uiterst nauwkeurig wat details betreft. En zeer precies wat betreft instrument klankkleur en uiterst nauwkeurig wat details betreft.
    Het is een nieuw geluid !!
    De investering is het dubbel en dwars waard.
    Hartelijk dank en met vriendelijke groet, Eric Palthe

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