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Propeller Head Plaza Technical and scientific discussion of amps, cables and other topics. |
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Propeller Head Plaza Technical and scientific discussion of amps, cables and other topics. |
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In Reply to: Re: Ok, but why? posted by john curl on August 21, 2006 at 10:59:40:
From the information I have on hand, the transconductance of a vacuum tube is very similar to that of FET.i.e. For both FETS/Vacuum tubes,
Gm is changes in linear proportion to current change.
Whilst that of BJT, Gm changes with the square root of the current change, which you mistakenly attribute to FETs.
From your discussion, it is not clear why tubes are superior to transistors simply on the basis of the Child-Langmuir law (i.e. 3/2 power law), the transconductance of transistors devices (albeit by different mechanisms for each device), can be compensated for. Or is there any clarification here you want, this is especially true of FETs.
Music making the painting, recording it the photograph
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Follow Ups
- Re: Ok, some clarification - theaudiohobby 12:11:22 08/21/06 (4)
- Re: Ok, some clarification - john curl 13:57:46 08/21/06 (3)
- Re: Ok, some clarification - theaudiohobby 20:50:13 08/21/06 (2)
- Re: Ok, some clarification - morricab 03:02:35 08/22/06 (1)
- Re: Ok, some clarification - theaudiohobby 05:08:13 08/22/06 (0)
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