Restoring the Fairchild 670 #MusicMonday

Watch Vintage King restore a Fairchild 670. What is  a Fairchild 670? Here’s more from Universal Audio WebZine:

…the stereo Fairchild 670 is probably the “Holy Grail” of compressors in studio gear esoterica, not only because of its price but its extreme rareness and the difficulties in maintaining such a piece. The 670 can get fetch $30,000 and beyond on the vintage market. With its 14 transformers, 20 vacuum tubes, and 6 rack-space encompassing girth, the Fairchild 670 is the heavyweight champion of compression, weighing in at 65 lbs.

Originating from the early 1950’s, the design of the 670 uses a single push-pull stage of amplification with an extremely high control voltage. The Fairchild 670 is a variable-mu tube limiter. Variable-mu limiters are unique in that they use tubes for gain reduction, and not just as amplifiers. The audio path is quite simple, and compression happens directly in the audio path, rather than sending out to a separate compression circuit.

Learn more!

 


As 2022 starts, let’s take some time to share our goals for CircuitPython in 2022. Just like past years (full summary 2019, 2020, and 2021), we’d like everyone in the CircuitPython community to contribute by posting their thoughts to some public place on the Internet. Here are a few ways to post: a video on YouTub, a post on the CircuitPython forum, a blog post on your site, a series of Tweets, a Gist on GitHub. We want to hear from you. When you post, please add #CircuitPython2022 and email circuitpython2022@adafruit.com to let us know about your post so we can blog it up here.

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CircuitPython – The easiest way to program microcontrollers – CircuitPython.org


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