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The article mentions the advantages of transistors over vacuum tubes, but not the other way around. I believe there still are applications where vacuum tubes are preferred over transistors, like high fidelity audio. At least until recently. I don't know if there has been such advancement in transistor technology that maybe vacuum tubes are not used anymore at al where they can be replaced by transistors.(MrDeBeuker 19:40, 16 February 2006 (UTC))
All This stuff has been removed from the page because: A) This text is not about transistors B) page is about transitors and not transitor amplifiers. C) page is not about audiophiles or how transistors sound
Some argue that the larger number of electrons flowing in a vacuum tube behave with greater statistical accuracy, although this ignores the fact that vacuum tubes generally have a high-impedance control terminal (grid), and that discrete transistor circuits (as opposed to integrated circuits) can also be designed to use large currents.
Others detect a distinctive "warmth" to the sound. The "warmth" is actually distortion caused by the vacuum tubes, which some audiophiles find pleasing. This is "soft-saturation" which occurs when vacuum tubes are overdriven, causing poorly designed vacuum tube amplifiers to sound better than poorly designed transistor amplifiers. Tube amplifiers are also less prone to slew-rate limiting, which was a problem with early semiconductors and is still observed in low-cost transistor audio amplifiers.
Above speculative opinion gives no correlation between characteristics or measurements and perceived sound quality. See Tubes vs. Transistors - Is There An Audible Difference? and Transistors vs. Tubes - Brief Feature Comparison.
Vacuum tubes are also preferred in guitar amplifiers which are designed to be overdriven, because they have a different non-linear transfer characteristic than transistors, and create a different, more pleasing spectrum of harmonic distortion or "fuzz". Digital signal processing (DSP) can be used to achieve similar effects in the digital domain.
(single-ended transformer coupled to push-pull transformer coupled to push-pull capacitor coupled to push-pull direct coupled). DSP Recently, inroads have been made in digital signal processing (DSP). DSP is a technique that can (among other things) be used with A/D and D/A converters to allow a digital processor (along with a computer program) to manipulate analog signals.
I totally agree that this stuff does not belong here. I didn't have the energy to start a new page at the time. :) Snafflekid 02:11, 14 October 2005 (UTC)
If its to go anywhere, it should go to audio amplifiers or electronic amplifiers--Light current 00:50, 14 October 2005 (UTC)
I try to delete as rarely as possible. At bare minimum it is better to move it to an new page or even cut and paste the unwanted stuff onto a new wikipage and let someone else edit it IMHO. Snafflekid 02:09, 14 October 2005 (UTC)
Im not sure if you are telling me off here 'O'. Have I done something wrong IYO?--Light current 02:21, 14 October 2005 (UTC)
"though this is usually a desirable part of the sound of guitar amplifiers" There are many valve characteristics that contribute to the "valve sound" both for guitar amps and hi fi amps (valve amplifier topology also has a major influence). But the modulation of the valve characteristics by vibration is not a significant or consistent one. In some layouts the valve amp can be physically isolated from the speakers but this does not affect the sound. In fact valve manufacturers go to great lengths to minimise vibration effect and they often do this in different ways giving different characteristics. (Russian EL34s compared to Mullard EL34s). Suggest this statement be deleted. CPES 01:22, 24 April 2006 (UTC) (80.177.169.33)
Also statement "and can take advantage of the higher electron mobility in a near vacuum" is not really a main advantage but more of a tube design aspect which is not visible to the user as an advantage. Valves are not faster than trans (not anymore anyway). This aspect does not fit with rugged aspect either. KIS also applies. Suggest delete. - CPES 22:25, 27 April 2006 (UTC) (80.177.169.33)
It looks like this page has been trimmed, so I didn't want to add to it without discussion. I'd like to see a bit of information relating to cost. A quick Internet browse shows that from about 1955, the bulk price has dropped from about $5.50 per transistor to about $1.00 per 200 billion transistors.(wrong) With that drop in price, there have been enormous gains in various efficiencies (switching speed, power consumption, frequency response, consistency of manufacture, etc.). Fracture98 06:45, 27 August 2006 (UTC)
value of 1955 $ to 2005 $ "It cost $49.95 (the equivalent of roughly $500 in year-2005 dollars" this from http://en.wikipedia.org/wiki/Transistor_radio.
thst page on transistors gives a value of $361 (i think).. i don't know which one would be right
ok, just found http://stats.bls.gov/ it works out to $364
--Roger sandwich 13:52, 12 June 2007 (UTC)
Tran page is much leaner and cleaner now thanks to the good work of the electronics standardisation team and others. So what is the relevance the images of the tran curve tracer: suggest this should be deleted? Also, it would be nice if we had some images of tran packages showing surface mount thu to TO3 to give an indication of package size range. CPES 00:52, 24 April 2006 (UTC) (80.177.169.33)
This user deleted the entire page on the transistor. I fixed the page. Perhaps someone could look into this to see if this has occured before, or is occurring regularly.
11:18, 24 January 2006 82.211.102.159 - This user deleted the entire contents of the page.
It says "... allows a precise amount of current to flow through it from the circuit's voltage supply." I would recommend to replace "precise" with something like "substantial" or "significant". Using "precise" is completely wrong because in fact every individual transistor is very imprecise, and it's parameters vary widely from sample to sample, and with temperature. An electronic circuit can be made precise if a certain combination of transistors is used (like OA, operational amplifier) having high amplification but with a deep negative feedback loop. - apredtechenski, Sept 06, 2005
Agree. Ive changed it!--Light current 00:39, 21 September 2005 (UTC)
This page is an archive of past discussions. Do not edit the contents of this page. If you wish to start a new discussion or revive an old one, please do so on the current talk page. |