Recreating the Analog Beauty of a Vintage Tektronix Oscillator
1 min read
Summary
In the 1980s, Tektronix produced the SG505 oscillator module with some of the lowest levels of distortion available at the time, but it used many custom parts that are no longer manufactured.
Blogger and engineer Paul has undertaken the difficult task of creating a modern version of the SG505 using readily available parts, a challenge he describes as “a tall order”.
So far he has been successful in tracking down substitutes for many of the required components, including a modern J-FET, but is still searching for a dual-gang precision wirewound 10k single-turn potentiometer without a physical stop, to adjust the module’s frequency.
Such components are no longer in production and were custom-made for Tektronix, meaning he will have to engineer the part himself.
He is still in the planning stages of the project, and is looking forwards to performing an FFT analysis to compare the results with the original SG505.
