Hi,
Even though it seems I won't find time to try:
Shouldn't the Zen v. 9 make a nice preamp when substituting the power-fet with a famous 2sk170 and readjusting the currents & voltages?
Signalwise, it would be a purist SE-approach, and even the output-cap wouldn't hurt that much since it's inside the fb-loop.
The potential issue I can see is limited output current/highish output impedance.
I might have been tried by someone, cause it seems so obvious, doesn't it?
Rüidger
Even though it seems I won't find time to try:
Shouldn't the Zen v. 9 make a nice preamp when substituting the power-fet with a famous 2sk170 and readjusting the currents & voltages?
Signalwise, it would be a purist SE-approach, and even the output-cap wouldn't hurt that much since it's inside the fb-loop.
The potential issue I can see is limited output current/highish output impedance.
I might have been tried by someone, cause it seems so obvious, doesn't it?
Rüidger
Wow, thats great. Cant wait to see it
Thanks a lot for responding A new chapter in the Zen preamp history, who would have thought that? I was afraid that the statement "this pretty much finishes the preamp offerings in the Zen series" was gonna hold!!
Thanks a lot for reconsidering!
Steen
(quite happy )
steenoe said:Wow, thats great. Cant wait to see it
A new chapter in the Zen preamp history, who would have thought that? I was afraid that the statement "this pretty much finishes the preamp offerings in the Zen series" was gonna hold!!
Thanks a lot for reconsidering!
Steen
I don't wanna be rude-but why not susy then?
susy or blowtorch or whatever-they seems all are along the pretty similar line (except susy approach
)just for illustration-thinking of little ZM about these ideas......nothing new under the sun.....from other deviant thread
http://www.diyaudio.com/forums/attachment.php?s=&postid=950209&stamp=1151491647
btw-I like boundaries and tasks stated from Papa....
he sometimes show almost psychotic urge to please the children
Hey thats easy to understand
This is the Pass forum!! Loads of us guys around here knows Mr. Pass from the past!! Personally I know his amps way back from the late 70'es Allways, allways was Mr. Pass's amp's superior! I have listened to loads of amp's, but the best are Pass's amps! I heard the Treshold A400 and 4000's and they were the greatest at their time!
Mr. Pass is "God" on this forum
Just in case you missed itSteen
Err...Who is Papa I think you may find something in the US Patent Office If your looking for "Pass"
I think you may score a few hits on any search engine
Not to forget, passdiy.com firstwatt.com and passlabs.com
And, you may find countless publications, highly praising his work...
You may even notice the title of this Forum Catagory
Without Mr. Pass... We would all be in the Solid State Forum??? Who is Mr. Solid State?
I think you may find something in the US Patent Office If your looking for "Pass"I think you may score a few hits on any search engine
Not to forget, passdiy.com firstwatt.com and passlabs.com
And, you may find countless publications, highly praising his work...
You may even notice the title of this Forum Catagory
Without Mr. Pass... We would all be in the Solid State Forum??? Who is Mr. Solid State?
Hi,
that was exactly that kind of answer I hoped for: I tried, but something else seems to be better.
In quite a few MC-phono amps, we have a SE FET as first stage, sometimes cascoded, sometimes paralleled.
If we look at the ono's first stage, which is cascoded and is fed by a cap multiplier: is a aleph-style CCS beneficial or not? Might be worth to try...
thanks,
Rüdiger
that was exactly that kind of answer I hoped for: I tried, but something else seems to be better.
In quite a few MC-phono amps, we have a SE FET as first stage, sometimes cascoded, sometimes paralleled.
If we look at the ono's first stage, which is cascoded and is fed by a cap multiplier: is a aleph-style CCS beneficial or not? Might be worth to try...
thanks,
Rüdiger
Lovoltechs vs. other JFets
The Lovoltechs have a triode / resistive region up to around 4V and in the Zen V9 they are operated exactly in this region. Maybe this region is even higher at lower currents
It might be still be a good idea to try a preamp with the Lovoltechs, and the low voltage isn’t an issue if you use them in a cascode circuit.
And there are countless preamp circuits around using SK170s so you would have to be very creative to come up with something that hasn’t been tried before.
The Lovoltechs have a triode / resistive region up to around 4V and in the Zen V9 they are operated exactly in this region. Maybe this region is even higher at lower currents
It might be still be a good idea to try a preamp with the Lovoltechs, and the low voltage isn’t an issue if you use them in a cascode circuit.And there are countless preamp circuits around using SK170s so you would have to be very creative to come up with something that hasn’t been tried before.
I'm bringing back this thread because I have a question that might have been raised (and answered) here, but I'm not sure.
Might the LU1014 serve well as the cascode device (replacing the mosfet) being controlled by a SK170 or the like? I'm thinking about this for a preamp (mc phono, to be precise) and not for the input stage which might be a transformer.
Might this be possible (does it have the, uh, guts)? Would it provide any benefit over the mosfet?
Might the LU1014 serve well as the cascode device (replacing the mosfet) being controlled by a SK170 or the like? I'm thinking about this for a preamp (mc phono, to be precise) and not for the input stage which might be a transformer.
Might this be possible (does it have the, uh, guts)? Would it provide any benefit over the mosfet?
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