Pultec Eqp-1a Schematic

Following the initial gain stage, the schematic often shows a cathode follower stage (usually utilizing a or 6FQ7 tube). The cathode follower is a critical design choice because it provides a low output impedance. This is necessary because the passive EQ network that follows has a relatively low input impedance. Without this buffer stage, the impedance mismatch would cause significant frequency response anomalies and signal loss.

The input tube is typically a (or sometimes a 12AT7 depending on the specific revision). In the schematic, this is configured as a voltage amplifier. It takes the incoming line-level signal and amplifies it to a level sufficient to drive the inductors in the EQ section without introducing noise. pultec eqp-1a schematic

Original units were built without PCBs, making them easier to replicate with traditional soldering. Following the initial gain stage, the schematic often