Questions tagged [vacuum-tube]
Any device that incorporates an evacuated chamber in which free-floating electrons are manipulated.
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Interference between speaker and vacuum tubes
I'm building my own guitar tube amp, and now I have a dilemma. The speaker magnet is so close to the preamp tubes that I'm worry about interference between both.
Should I be worried or that is not a ...
user22230
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Noise from solid state rectifier in tube amp
Recently I was talking to a friend about solid state rectifiers in tube amps. He told me that solid state rectifiers induces noise in the power supply, because the breakdown current of the silicon ...
user22230
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How to perform a frequency response test in a tube amp output transformer?
I have an output transformer, which is a clone from an original Fender 5e3 transformer, I would like to know how it's behavior in typical frequencies. How can I perform such test using instruments ...
user22230
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Inductor Fed VR Tube
Would it be beneficial to feed a voltage regulator tube with an inductor (as in the following pic)?
I'm thinking that a 50vdc air-gaped reed relay coil would do the trick. They measure about 1.9k ...
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Types of wire and applicability for guitar amps
I'm working on a DIY project for a tube amp. Next step will be to buy the right components and then actually mount everything.
I have some experience with amplifier theory but have never built one. ...
user22230
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Negative Feedback and life cycle of Vacuum tubes
There are many guitar tube amplifiers schematics that don't use negative feedback.
I was wondering how the negative feedback can help in the life cycle of the tubes? (If can help)
user22230
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Vacuum tubes heaters supply, AC or DC?
Which way is better to feed the heaters of a vacuum tube on a guitar amp, AC or DC?
With the same transformer, is it possible to change between AC and DC supply for the heaters?
user22230
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What are these symbols?
Well I have these schematic of a vaccum tube amplifier, and I'm having some problems to understand some symbols.
What are these symbols in red?
What does exactly CW mean? It should be a logarithmic ...
user22230
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Op Amp for Heater Supply?
Can someone recommend a good op amp that can run on a potentially noisy 6.3V tube amp heater supply?
So desired / required characteristics are:
Single supply < 6.3V (although I think the 6.3V is ...
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IN-12A Nixie Tubes and K155ID1 (74141 clone) Power
I'm working on a design with some Nixie tubes (a clock, specifically to start, but I'm gonna have a ton left over for other things), and due to the rather expensive nature of the K155ID1/74141 ICs, I'...
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Replacing MOSFET with tube
I am working on making a flyback driver with a 555 timer. The only part I need is a MOSFET power transistor. I am wondering is it possible to substitute a triode vaccum tube (14GT8) for the MOSFET?
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Vacuum tube LED flasher
I am wondering if I can make a vacuum tube oscillator for a LED flasher.
The problem is I only have 4 vacuum tubes: 14GT8, 12AU6 and 2 12BA6 tubes. I have a 12 volt DC power supply, 10 volt AC, 20 ...
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Lighting up an old vacuum tube
Does anybody know how to light up a vacuum tube? I have about 9 of them and only 1 I can see the name. It is a 12DT8. Is it possible to find the heater without the datasheet by using a multimeter etc.....
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Trying to get that tube sound from a gainclone amp
A Gainclone amplifier makes for a nice simple benchmark/monitor amp. It is a class AB linear amplifier capable of 20 W - 120 W of power, and is based on a monolithic amplifier chip such as the LM1875, ...
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Can someone explain this tube amplifier circuit for me?
I have a tube radio that has really low output (I mean the sound is barely audible at full volume). Probably some capacitor in the LF amp failed. However, after I downloaded the schematic diagram, I ...
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Mathematical models for vacuum tubes?
Are there any commonly accepted algebraic models for vacuum tube operation (triode, tetrode, and pentode)? In the same way that BJTs have a Gummel-Poon or Ebers-Moll model, and (macroscale) MOSFETs ...
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