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Here's all the data one could reasonably ask for. However, don't expect a tutorial unless you're willing to pay for it.

First off all silicon semiconductor junction capacitances do indeed have the characteristics of a K=12 dielectric. There's no getting around that. I'm not talking about silicon dioxide which is an insulator used at the gates of MOSFETs, but of all intrinsic silicon junctions.

Links:

Picking Capacitors Parts 1&2:

http://home.comcast.net/~wjungieee/wsb/Picking_Capacitors_1.pdf

http://home.comcast.net/~wjungieee/wsb/Picking_Capacitors_2.pdf

These will familiarize you (if you read them attentively) with the electrical and some of the sonic consequences of dielectrics having a range of K values. These articles are about component capacitors, but the parameters apply to all capacitances sharing these types of dielectrics.

See text on charge storage effect and nonlinear base capacitance in audio power amplifiers in the following links:

http://www.audioprecision.com/publications/technical_papers/Comparison_of_Non-linear_Distortion_Measurement_Methods.pdf

http://www.tubetechnology.co.uk/faq_tube_ren.pdf

A link with a table listing dielectric properties of different materials including silicon as used in semiconductors:

http://www.inrf.uci.edu/research/posters/Microwave_Measurements_on_Dielectric_Constants_Prof_Chen_Lee_UCI_949-824-7462_Jeong_Park.pdf

There's plenty more where this came from to substantiate the facts I have been illustrating about the audible superiority of tubes over transistors. I recommend you google or read up on technical materials related to semiconductors (which being an electronics design engineer I am already well familiar with). I believe any unsubstantiated opinions remaining are yours.


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