[[[[5687
5687
5687
5687 Tube
Tube
Tube
Tube Pre-Amplifier
Pre-Amplifier
Pre-Amplifier
Pre-Amplifier ]]]]
Analog
Analog
Analog
Analog Metric
Metric
Metric
Metric
www.analogmetric.com
4
•
Turn off the power supply if you observe any smokes or hear strange sound coming
out from the transformer or board. If there is short circuit, the transformer will be
getting very hot shortly.
PROCEDURES
PROCEDURES
PROCEDURES
PROCEDURES
1. Hook up all the components according to the schematic, part list, and photos.
Notice to the polarity of the high voltage electrolytic capacitors (C1, C4, C6, C9).
There are no polarities of the thin film capacitors.
2. Apply either one or two 260V DC to J3 and 12.6V DC to J4. Connect the GND of
these two connector. If you only have one 260V DC, connect the two '260V DC'
pins together.
3. If everything work fine, the tubes will be led up gradually. Then, apply signals to
connectors J1 and obtain corresponding output signal at J2.
4. Enjoy it.
