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U3
K155ИД1
OK1-OK6
EL817
R12
330Ω
U3 socket
16 pin socket
J3, J4
Pin strips
6.1. Take the resistor R12 and bend it, like pointed in item 3.1. Insert resistor into the board holes
marked as R12 and solder it leads.
6.2. Actions for tube driver IC and its socket mounting are similar as pointed in item 5. Check your
work results with picture below.
6.3. One end of the OK1 ... OK6 symbol on the PCB has a half-hole at one end of the symbol. In
optocouplers OK1 ... OK6 first pin of the case marked by small dot. Install the optocouplers so that the
end with the dot is at the end of the half-hole symbol on the PCB. Press the IC firmly into the holes
into the PCB and solder the pins taking care not to create any solder "bridges" between the pins.
6.4. Cut the desired number of male pins and solder them into position J3, J4.
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6. Tube driver circuit components
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