What Electronic Projects are you working On

[Michael GilliganParticipant @michaelgilligan61133]

Posted by Johnboy25 on 10/05/2015 07:51:41:

… I can't understand what the obsession is about with valves I learnt my electronics on thermionic devices but still believe semiconductors are just as good.

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It's the behaviour in over-drive conditions … Valves produce mostly even harmonics when over-driven, and the distortion is therefore inoffensive [and may improve the perceived sound].

Despite the many attempts at producing 'soft clipping' in semiconductor circuits: Over-driven semiconductors produce all the harmonics and tend to a square wave output … this is offensive to the ears, and damaging to equipment. [e.g. many a blown tweeter]

MichaelG.

[StevoParticipant @stevo]

One test rig for model glow engines

Programmabe servo endpoints…. tachometer… integral glow panel.. From 2 picaxe chips and a bit of analogue bodgery!

[Neil WyattModerator @neilwyatt]

That I like, Steve. I never got past a box with 2 d-cells and an ammeter in it.

Neil

[Author]

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