aion TERMINA Manuel - Page 5

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BUILD NOTES

Bass trimmer

This trimmer, along with R3 and R4, sets the frequency and gain ratio of the op-amp clipping stage. It

impacts both filters, including the range of the Bass knob.

Set it to about 45% rotation for the stock Timmy circuit (4.5k + 0.68k || 9.1k = 3.3k). Or, if you don't care

to use this trimmer at all, you can use 3.3k for R3 and omit R4 and the trimmer entirely.

IC selection

The original Timmy has used both the JRC4559D and LM1458 throughout its production. Most V2's

used the 4559, while the V3 now uses the 1458. Use a socket and try both of them to see which one you

like better.

TERMINA TRANSPARENT DRIVE