[EL34 SE V Amplifier Full Kit]
Analog Metric
www.analogmetric.com
5
PRECAUTIONS
•
Do not use any body parts to touch the metal parts of the kit after power up or power
off, since the high voltage capacitors may not fully discharge. It may cause serious
electric shock.
•
Use a power transformer with fuse (1-3A) socket to limit the supply current in case of
short circuit or incorrect assembly.
•
Double check the assembled components with the part list.
•
Do not attempt the measure the voltage by multimeter with hand after power up. The
probes of the multimeter should be mounted by some stands to the points of the
measurement before switching on the power supply.
•
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
1.
Solder the resistors on the top of the board, and then the tube sockets according to the
part list. The resistance of the Dale resistors should be faced upward for easy of future
debugging.
2.
Solder all remain components on the bottom of the board. Notice to the direction of
the electrolytic capacitors C1, C4, C6, C7, and C8. There is no direction of the thin
film capacitors. Double check the direction of the electrolytic capacitors, as it may
cause hazardous.
3.
Apply two 6.3V DC/AC (1.5A) to H2, and one or two 280V DC (100mA) to P1. The
tube filament will be growing up gradually. Turn off the power supply if there is a
suddenly dropping in the supply voltage at P1, H1, and H2, and double check all the
electrolytic capacitors.
4.
Connect the output transformer to B+, ROUT and LOUT.
