Spatial Inc preamp

[amolas]

In the past, my father owned a Spatial inc preamp, which sounded very well !

I know that it uses a technology called T-FET Valves...

But I was not able to get more information about it. So now, I'd like to build such a preamp.

Does anyone have any information about this preamp ?

PS : I don't know if it's the good place to ask... but I hope you will able to help me !

Have a nice day

Antoine

[lineup]

Looks like Richard Knapp may have been the constructor of this preamplifier.
But found almost nothing about this amp, besides at his own website,
where he tells how good he is:

Audio Science & Engineering

Audio Engineering: invented numerous audio and sound technologies, including: coherent pre, mic, line, and power amplifiers [TFET]; multi-band noise reduction, compression, expansion, and exciter systems; non/powered loudspeaker systems; true-3D stereo recording system.

Audiophile Electronics: designed the Spatial Coherence Preamplifier and Power Amplifier, audiophile amplifiers that received world-wide acclaim as "by far the best sound."

Semiconductor Physics: invented the TFET-Valve Coherent Amplification Technology [2 patents] implemented in the Spatial, Inc. audiophile electronics, using an original discovery of electron-velocity modulation to linearize the transconductance functional.

Audio Phenomenology: solved the issue of auditory differences among amplifier technologies, a problem debated for decades, using coherent information theory as it applies to semiconductor physics.

http://www.msoracle.com/rktech.htm

[amolas]

Thank you for answering to my post

I 've read this website, I will try to contact him, because it seems that his job is no more linked with audio...
Perhaps he will give me some details...


Any other informations ?

[lineup]

Originally posted by amolas
Thank you for answering to my post

I 've read this website, I will try to contact him, because it seems that his job is no more linked with audio...
Perhaps he will give me some details...

Any other informations ?

Yeah, contact him.
I am sure he will be glad to talk about his unique amp.
If so, maybe you will find others that wants to build this, too.

[SY]

Check out that website. Fruitcake city.

[poobah]

"Spin" was created by the author from his extensive exploration into alternate realities of consciousness.

Well... at least that sentence made sense. So, this guy invented spin?

[Nixie]

Has anyone looked at the mentioned patents? They are 4241316 and 4496909 (don't waste your time with the USPTO website; PDF versions can be downloaded for free from a number of sites, such as pat2pdf.org).

[Nixie]

I just read it, and the core idea is in the latter patent's summary:

In accordance with the method, the nominal operating point for a Field Effect Device is chosen so that the electric field in the drain depletion region is biased in the carrier partial velocity saturation regime. With this biasing, the transconductance and output conductance of the field effect device have the same current dependence so that the rario of these two parameters is independent of current. Thus the gain of the device is independent of bias source noise, so that the bias source noise does not modulate the input signal. In addition, if a device is biased in accordance with the present invention, the drain noise modulation of the edge of the drain depletion zone emulates that created by a gate input, so that the depletion zone noise may be considered as a gate input noise, andd the transconductance is not intermodulated by that noise. Accordingly, the output of the device is substantially free of noise intermodulation components and has maximum coherence with an equivalent gate input so as to both minimize the noise output by the field effect device and allow maximum reduction of the noise when using feedback.

Removing modulation with power supply noise is not interesting because one can just have a very well filtered power supply. What is, however, interesting is his claim that his biasing method ameliorates the effects of modulation with the device's intrinsic noise. Is it BS or is there something to it? Hopefully someone here will answer this for us.

[GK]

Originally posted by lineup
Looks like Richard Knapp may have been the constructor of this preamplifier.
But found almost nothing about this amp, besides at his own website,
where he tells how good he is:


http://www.msoracle.com/rktech.htm

Maybe I'm a bit dumb, but that guys website makes absolutely no sense to me whatsoever.

[Nixie]

The hell with the website, that's marketing; what about the patents?