18 way Edge connector PCB that fits Neve module rear connectors on 1272, 1073 , 1064, 1066, 1080, 1081 etc.
R1 R2 R3 & C1 are all for 1272 modules. None need to be fitted for other full mic pre eq modules as it has them internally already.
- R1 is for 1272 1st stage gain boost
- R2 is used for pot on 1272 to limit its range. Link for full level control or fit 5k1 for 6dB range
- R3 is for 1272 2nd stage gain boost usually 1k5 and 100uF. Same as an internal boost in 1073 output stage