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Peter Wieck[_2_] Peter Wieck[_2_] is offline
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Default Introducing a New Horse to the Stable

https://www.eeweb.com/tools/parallel-wire-inductance

This website will allow you to calculate inductance by giving it the gauge, type and nature of the wire you are using. You will find, pretty quickly, that the distances involved in the typical component of say 40 cm (16") square are such that the actual inductance realized will be infinitesimal in "real life".

Again, getting to practical matters: there are common-sense applications and techniques for wiring electronics, much dependent on the nature and use intended. Part of my hobby is the restoration of vintage Zenith TransOceanic tube radios - and wire location/component location can be critical for high-band Short Wave sensitivity. It is common sense to shield power-supplies in pre-amplifiers, especially those that contain phono or NAB pre-amp sections. And, wire-dressing is always good practice. But worrying about straight-wire inductance at audio frequencies is much akin to worrying about skin-effect...

Now, Trevor clearly has a 'thing' about negative feedback, which is entirely his choice, and doubtless for sufficient and good reasons. But, again, in the real world, negative feedback, done properly, has many more advantages than disadvantages. Done badly - Ouch! Keep in mind that in its most practical application, it dates back to 1927, and was patented by Bell Labs in 1937. So, it is a pretty well established technique, such that any thoughtful designer not totally strangled by the bean-counters will get it right very nearly all of the time.

https://en.wikipedia.org/wiki/Negati...is_of_feedback

Go down to the "distortion" section. As brief as it is, it conveys some very good information.

In point-of-fact, part of the TIP-Mod for your 120 involved increasing capacitance within the feedback loop to reduce bass roll-off.

Peter Wieck
Melrose Park, PA