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scientificguitarist - Don't Tell Ray - PT2399-Based Oil Can Delay

DIY oilcan delay kit

"When it comes to delay, we are all aware of the tape, analog, digital, and even magnetic drum style delays like the Echorec. However, there is one design that has been almost lost to time, and that is the oil can delay. Invented by the founder of Tel-Ray, the oil can delay operates by using a spinning magnetic disk with carbonized rubber read and write heads. The disk spins in a can of special oil that helps to keep the rubber heads lubricated and to help prevent the leakage of the magnetically stored data.

In the guitar pedal world, there has been a small resurgence of interest in the oil can delay due to its unique, murky sound. Old Blood Noise Endeavors and Catalinbread both have digital emulations of them, but as far as I could tell, no DIY designs existed. I decided to see what I could do with the ubiquitous PT2399. Over the course of a few months, I spent hours reading and watching everything I could find on them, detailing things like delay time ranges, RPM, methods of degradation, etc. so that I could take them into account as best I could. While I don't claim this circuit to be an exact emulation, it does a great job of getting some of that super old school vibe in a DIY-able circuit. And because it's supposed to mimic a Tel-Ray, I have decided to call it Don't Tell Ray."

cred: scientificguitarist.wixsite.com

#tel ray #DIY #oilcan delay #scientificguitarist #diy projects

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scientific guitarist - echowreck delay

A PT2399-Based Work-Alike of the Classic Echo Machine namely the Binson Echorec

“In a discussion of classic delay/echo effects, the ones that most frequently get mentioned are the EchoPlex EP-3, Roland Space Echo, and the Binson Echorec. The EP3 and Space Echo are tape delays, while the Echorec is based around a magnetic disk that spins past 4 playback heads.There have been some DIY projects in the past that have attempted to replicate the sound of the Echorec with varying amounts of success. The awesome Multiplex from 1776 Effects cops the general vibe of the Echorec, but uses only two delays instead of 4. The FV-1 chip also makes it possible to get a high level of accuracy and detail, but I'm a cheapskate and wanted to see what I could do with the old standby, PT2399.The Echorec has a fixed delay time of approximately 300 ms, but I wanted to give a little more flexibility, so I added adjustable (but synchronized) delay times and decided to add tap tempo for good measure. Additionally, there is filtering on both the playback and feedback paths.​Don't want to read all about how it works below? Go get all the project stuff you need here.“

cred: scientificguitarist/echowreck

#scientificguitarist #echowreck #echorec #DIY #DIY Projects