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C5 0 Ohm jumper Bridge the component holes with a
C6 0 Ohm jumper Bridge the component holes with a
Install the polarized electrolytic bypass capacitor
Make sure that the polarity of C17 matches the polarity of the silk-screen on the PCB.
Make sure the negative indication of the capacitor is away from the positive indication of
the PCB.
Install the bipolar transistors.
Make sure to match the shape of the TO-92 case to the outline shown on the PCB silk-
screen. There should be a space of about 3/8” between the top of the PCB and the bottom
of the transistor bodies.
Description, rating, function
, 40 volt NPN, mono relay
Install the tone control pots.
As previously noted with other multi-pin packages, we offer the following hints:
1. For each pot installed, just solder one pin first. Make sure that the pot sits flat to
the PCB. Melt that first connection, if necessary, to get the pot to sit flat.
2. Solder the remaining connections once you’re sure that the pot is sitting flat.
R14 9 mm dual 10K
Treble control
R16 9 mm dual 10K
Bass control
Volume and Balance Motor Pot Installation
This kit uses motor pots from two different vendors. The Bourns pot, which goes into A2
on the silkscreen on the left side of the PCB, is used for balance. Prepare a long and a
short piece of 26 AWG solid wire according to Figure 42.
Figure 42-Motor POT wire preparation
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