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=== Notes ===
* A link be used instead of the ferrite beads if you don't care about power-rail noise.
*Note that in the schematic the second op amp of the TL072 (the Inverted Out) show wrong pin numbers. 5 and 6 should be swapped. The polarity is right though.
== CC-BY-NC ==
Readers are permitted to construct these circuits for their own personal use only. Ken Stone retains all rights to his work.
== See also ==
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== References ==
* ''[https://web.archive.org/web/
== External links ==
=== Suppliers ===
* [https://web.archive.org/web/20180329091015/http://www.elby-designs.com/webtek/
[[Category:CGS
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