![]() But each lesson learned was invaluable, and after a while I figured out not only how to make great gear, but I began learning how circuits worked and what it was made these old designs so great. Along the way I made a lot of mistakes, of course: bad grounding (“hummmmm.”), popped caps, burned up power supplies, toasted transistors and opamps, etc. This was long before sites like DIYRE came along, of course, and I had to figure out how to do things pretty much from scratch. I love DIY! I got my start building gear almost two decades back by scouring the internet (a much smaller internet back then) for schematics of classic gear in hopes of building the stuff I couldn’t afford to buy. One reason that I have an issue with Drip’s stuff is that they don’t provide any schematics for their boards and on top of that, the power supply circuits on the boards do not usually follow the original schematics.Today's post is by Joel Cameron of Rascal Audio, who's collaborating with us on a new EQ kit. These amps operate at 500VAC and it is essential that safety is considered above anything else when building these amplifiers. Other important EE tools are a variac, isolation transformer, good soldering rig, and good clippers/strippers. I also think that an oscilloscope is mandatory if you are going to be building any electronic gear beyond simple circuits. Although these Drip pultec eqp1as are an easier Drip build, they are still complicated and require a lot of soldering. I wouldn’t recommend tackling a build like this unless you have Electrical Engineering skills and tools at your disposal. By building these from the ground up and hand selecting the parts, I have been able to control what goes into the units and ensure that the units are truly matched and amazing. Most of the original Pultecs that I have played with have had noise issues, or have not been matched. By using high quality film resistors, and the best tubes and transformers around, we are able to build vintage gear that is absolutely amazing sounding and highly sought after. The unique thing about these is that they are a passive eq that uses a really nice tube amplifier for make up gain. I believe that this is one of Drip’s best board kits yet as Greg Drip is finally designing front panel boards which makes the builds much cleaner!. By building them myself, I have an appreciation for the circuit, can hand pick the components, and I can truly ensure that the units are matched. These Drip Pultec Eqp1a equalizers are the latest installment to the studio. JJ Gold Pin ECC88 & Electro Harmonix 12AX7 tubes.Panasonic Film Caps in EQ filter section.Sowter Transformers and inductors (The absolute best audio transformers available.).Drip Pultec EQP1A I have been working in the lab to bring Some custom drip pultec eqp1as to life. ![]()
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