The two sets of transistor pairs, Q3 and Q4, and, Q9 and Q10, can be tied together with a cable tie to help keep
both devices at a similar temperature. This reduces the amount of drift in the filter's and LFO's operating
frequencies.
These boxed IDC headers are polarised as they have a notch taken out of the side to ensure an inserted socket is
fitted the correct way around. They are fitted to the topside on the main board and on the underside of the socket
board.
10