![background image](http://html2.mh-extra.com/html/oakley/5u/5u_builders-manual_3108376012.webp)
Integrated Circuits
LM393 dual comparator
U7, U8
LT1013 dual op-amp
U1, U2
THAT300 NPN array
U6
TL072ACP dual FET op-amp
U3, U4, U5
Miscellaneous
10-way SIL socket *
OSC1, OSC2, OSC3
* OSC1 to OSC3 are mounted on the underside of the board and soldered from the top.
IC sockets are optional but recommended for DIY projects. There are seven 8-pin and one 14-pin
DIL socket used on the VCO board.
The three ten way SIL sockets on the VCO Board, like the eight sockets on the main board, are mounted on the
underside of the board.
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