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Tube emulation with transistors
Tube emulation with transistors
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Old 2nd February 2014, 07:29 PM   #1
fireworks is offline fireworks  Switzerland
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Default Tube emulation with transistors

Here is an interesting web page with transistor circuits that emulate tubes:
Tube emulation with solid state devices

Has anyone built amplifiers with such circuits ? If so, what are your impressions ?
Also, if you have other links to such circuits, please post them here.
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Old 2nd February 2014, 08:39 PM   #2
smoking-amp is offline smoking-amp  United States
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Nice triode

Nice triode
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Old 2nd February 2014, 09:11 PM   #3
fireworks is offline fireworks  Switzerland
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Thanks, that looks interesting. I'll take a better look later.
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Old 3rd February 2014, 10:32 AM   #4
Vincent77 is offline Vincent77  Europe
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Quote:
Originally Posted by fireworks View Post
Here is an interesting web page with transistor circuits that emulate tubes:
Tube emulation with solid state devices

Has anyone built amplifiers with such circuits ? If so, what are your impressions ?
I have built and tried most of these guitar FX and while usable, they don't really sound like tubes.
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Old 3rd February 2014, 03:08 PM   #5
speakerfritz is offline speakerfritz  United States
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played arounded with the DC biasing of Transistors back in 1980.
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Old 3rd February 2014, 05:07 PM   #6
Elvee is offline Elvee  Belgium
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Quote:
Originally Posted by fireworks View Post
Also, if you have other links to such circuits, please post them here.
Some ideas here:
http://www.diyaudio.com/forums/solid...ept-c-vac.html
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Old 3rd February 2014, 05:29 PM   #7
fireworks is offline fireworks  Switzerland
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Default What is their sound ?

Vincent77

and others who have tried those emulators in real life, what were your results with them ?
My interest lies in experiencing the "tube sound". I'm thinking of building and/or designing an amplifier using these circuits instead of real tubes.
There are many advantages to doing that including cost, weight since there is no output transformer, etc..

Since I'm interested in a (HI-FI) amplifier, not a guitar one, I think that those emulators might be enough. Obviously, for guitar amp. the emulator should give the same distortion as a tube in the very non-linear regime.
For a audio amplifier, it only needs to be faithful in the "almost linear" regime.
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Old 3rd February 2014, 05:32 PM   #8
fireworks is offline fireworks  Switzerland
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Quote:
Originally Posted by Elvee View Post
Elvee,

That's interesting, I had the same idea of amplifying the current output of a tube.
Did you build your circuit and if so, how does it sound compared to the original tube or just tubes in general ?
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Old 3rd February 2014, 06:06 PM   #9
stocktrader200 is offline stocktrader200  Canada
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My first tube project is successful.
I am building a board for an amp using 12ax7 as the output boosted 100x
I should be able to get 50 Watts out of an E88CC.
The test amp sounds great with no global feedback
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Old 3rd February 2014, 06:10 PM   #10
fireworks is offline fireworks  Switzerland
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stocktrader,

Is the test amp a pure tube circuit or does it contain a "booster" ?
Also, what kind of booster you will be using ? Is it Elvee's ?
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