Erica Synths DIY Polivoks VCO kit - Manual (Page 7)

➎
Solder IC sockets and trimpots. Solder OP2 – it has to be soldered
directly without the socket. Solder PSU socket.
➏
Solder transistors! See the picture below that helps to identify the
transistors. KT315 are NPN transistors, KT361 is PNP transistor. Colors
of cases may vary, but the main thing is that KT361 has cyrillic letter G
in the middle of the case.
KT315G
KT361G
KT315B