This bass booster preamp is from an English publication (1966). We can mount it with more modern equivalent transistors. C5 and C7 may have values in the range of 1 to 47 nF, depending on the desired reinforcement.
![](/images/sampledata/cir/CB3970E_0001.png)
This bass booster preamp is from an English publication (1966). We can mount it with more modern equivalent transistors. C5 and C7 may have values in the range of 1 to 47 nF, depending on the desired reinforcement.