6X4 POWER SUPPLYThe power supply PCB was the first section to be built and tested. The DC output from the 6X4 rectifier tube is good and clean. I purchased my 6X4's from Tube Depot.com. I purchased the Hammond 270FX power transformer from Mouser Electronics.
BALANCED AMPLIFIERThe output stage of a Pultec EQP-1A is a "Balanced Amplifier Topology". A balanced amplifier operates with a "balanced input signal" and the signal remains "balanced" throughout the entire amplifier. Theoretically, a "perfectly balanced" Balanced Amplifier can significantly reduce Even-Order distortion.
TRANSFORMERSOne of the challenges of building your own Pultec EQ is deciding which transformers you would like to use. Quality transformers are not cheap. So, getting it right the first time is important. For this build, I chose a Sowter 1475e input transformer and a
PASSIVE EQ STAGEThe passive EQ stage is currently being breadboarded on my bench. I will need to create a PCB layout for it once I am finished testing. Stay tuned.
Thanks for reading,