–3.11 – Connecting the Direct Output to RCA Output Connectors
–3.12 – Connecting the Direct Output to an active Linestage
–3.2 – Connecting the Buffered Output
3.11 – Connecting the Direct Output to RCA Output Connectors
The direct output can be connected to an RCA output.
Simply connect the outputs using suitable shielded cable from the UVC Module to the RCA output connectors. Connectors are labelled on the PCB.
Make sure the sockets used do not allow electrical contact between RCA Socket ground and the chassis. Connect the RCA output pairs ground connection to the middle connection of a given output connector. Connect the Signal wires (L/R) to the respective connections of the output connector.
However note should be taken of the high output Impedance (up to 50KOhm in shunt mode and 25KOhm in standard mode) of this output. This may result in hum when using poorly shielded cables and high frequency roll-off when long cables are employed.
3.12 – Connecting the Direct Output to an Active Linestage
It is preferable to use the direct output to drive a buffer stage or line stage placed in the same chassis as the UVC. Such a circuit may be realised using the Universal Tube Stage (UTS) Module or indeed any other tube or solid state line stage.
Connect the ground (GND) connection to the line stage to the ground connection of the UVC and then connect the left & right signal lines as required.
3.2 – Connecting the Buffered Output
The Buffered output is (optionally) fitted with a minimalist zero feedback J-Fet Buffer of conventional design. This is based around the military grade, metal encased LSK389A monolithic dual J-Fet. Using this expensive but exceptional part combined with the split rail power supply allows to dispense with any input and output coupling capacitors, such as found necessary in some other recent buffered passive preamplifier designs.
This buffer is to provides an output that is compatible with driving long cables and offering a low output impedance well into the radio frequency range. This buffer turns the UVC into a stand alone buffered passive preamplifier.
When using this output it is necessary to fit the optional LSK389A Transistors as shown to the left.
Following this simply connect the Outputs using suitable cable or wire (shielding is optional but recommended) from the UVC Module to your output connectors. Connectors are labeled on the PCB.
Make sure the sockets used do not allow electrical contact between RCA Socket ground the Chassis.
Connect each RCA output pairs ground connection to the middle connection of the buffered output connector.
Connect the Signal wires (L/R) to the respective connections of the output connector.
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