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Author Topic: Thoughts on the difference in sound between tubes and solid state  (Read 25239 times)

jcmbro

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Re: Thoughts on the difference in sound between tubes and solid state
« Reply #30 on: October 15, 2018, 09:44:30 AM »
Sounds awesome GB!

flester

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Re: Thoughts on the difference in sound between tubes and solid state
« Reply #31 on: February 05, 2019, 01:14:35 PM »
Surely the Tube Sound happened by accident. Tube amplifiers were used to make guitars louder and they did. Then SS amplifiers were used and they also made guitars louder using smaller components and less energy. But they sounded different. Why should we strive to make them sound tubey?

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jfetter

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Re: Thoughts on the difference in sound between tubes and solid state
« Reply #32 on: October 12, 2019, 10:46:00 PM »
This is a harmonic profile pics of a triode single-ended.
I'm not aware of any solid state component that can do this across wide range of output levels.
The circuit is a 6sn7 / ne5532 hybrid.



teemuk

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Re: Thoughts on the difference in sound between tubes and solid state
« Reply #33 on: October 15, 2019, 03:43:04 AM »
Any asymmetrically distorting circuit will produce similar profile. E.g. single-ended common emitter amp.

And no, triode (in a specific circuit) won't do it across a wide range of output levels either: With small signal input the magnitude of distortion is negligible, as usual. With modest overdrive the distortion profile is as depicted. And with harder overdrive the magnitude of distortion increases (this including higher order harmonics), second and third harmonics becoming less prominent overall.

With a push-pull circuit the same triode produces almost no even order harmonic distortion at all, as usual.
« Last Edit: October 15, 2019, 03:45:36 AM by teemuk »

Loudthud

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Re: Thoughts on the difference in sound between tubes and solid state
« Reply #34 on: October 15, 2019, 05:00:38 AM »
With a push-pull circuit the same triode produces almost no even order harmonic distortion at all, as usual.
That is true, until you start drawing grid current on the input side like when you overdrive a power amp. Depending on the source impedance, odd harmonics will drop out.

See experiment with TDA2040 here:
https://music-electronics-forum.com/showthread.php?t=48223

jfetter

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Re: Thoughts on the difference in sound between tubes and solid state
« Reply #35 on: October 15, 2019, 07:59:26 AM »
Same hybrid ckt but high level out.

 

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