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Old 15th October 2011, 01:33 PM   #2871
nanana is offline nanana  Sweden
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that "patent" really cracks me up... as if the differences between a tube cascode or a JFET cascode were fundamentally different in operation or principle. the patent system is broken. it needs to be thrown in the crapper.
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Old 15th October 2011, 01:52 PM   #2872
EUVL is offline EUVL  Europe
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> I found the Modushop front and back plate not of sufficient quality for a piece like this.

Joachim,

You have seen the stuff we did for Jan in real.
You know how to get in touch if you want mechanical parts.
Jan already asked us for you and I said yes.
Personalised service only for friends.



F5X -- the EUVL Approach


Patrick
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Old 15th October 2011, 02:09 PM   #2873
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PBN Audio's fully balanced version of Borbely's all jfet and Fet totally discrete MC preamp with jfet /Fet voltage regulators and large external power supply using caps and chokes. Not exactly pocket change, but worth it if you like the best.



olympiapguts12.10.jpg

Olympia-P

Last edited by ticknpop; 15th October 2011 at 02:14 PM.
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Old 15th October 2011, 03:04 PM   #2874
RCruz is offline RCruz  Switzerland
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Quote:
Originally Posted by nanana View Post

i myself didn't take cascode seriously until i started using constant current loading with it. depending on the load, it was then possible to "shape" the spectrum back into a more "gaussian" distribution of the harmonic distortion: 2nd, then 3rd, etc.... the timbre is never normal when the odds are in the same magnitude.

using the high Gm VHF triode as a first step has been proven to work delightfully, but you do have to live with the rush. for me, it is still the reference. who's going to etf?
Hi nanana

Agree with you regarding the "gaussian" armonic distortion distribution.

What is a Gm VHF triode ? why do you need to live with "the rush" ?

What is etf ?

Sorry for the load of question marks, but that is how I normally get there
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Old 15th October 2011, 03:58 PM   #2875
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Quote:
Originally Posted by ticknpop View Post
large external power supply using caps and chokes.
As good as identical to the CPS (/P) power supply of Mr Norbaek's LX preamp.
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Old 15th October 2011, 04:27 PM   #2876
nanana is offline nanana  Sweden
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ahhh, forgive my assumptions....

Gm is the vacuum tube era's symbolic expression for transconductance. VHF is "very high frequency", from the old radio standard of up to 250 MHz. and "rush" is the amplified mix of johnson, flicker and 1/f noise that you hear in a tube preamp working with a signal level of under 1mV, or so.

Last edited by nanana; 15th October 2011 at 04:31 PM.
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Old 16th October 2011, 11:19 AM   #2877
RCruz is offline RCruz  Switzerland
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Thank you.... It is a nice word "rush" instead of "hiss"
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Old 18th October 2011, 07:10 PM   #2878
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I am back home so more soon.
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Old 18th October 2011, 10:07 PM   #2879
RCruz is offline RCruz  Switzerland
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Welcome back
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Old 18th October 2011, 10:19 PM   #2880
RCruz is offline RCruz  Switzerland
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Quote:
Originally Posted by Joachim Gerhard View Post
That was an LA Audio Pre-Pre with tubes. It sounds nice and cozy but can not compete in transparency and dynamics with something like the Suesskind. I keep it though as a benchmark.
Any details about the Suesskind PSU ?
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