Just finished my new v12r.... after listening a bit I found bypassing the output zobel cap (4.7u) with a small 47 styrene to be a major improvement.
More extension in the highs, better transient reproduction and fuller more detailed bass.
For Vref decided on a "soft" cap and the results are outstanding.
More extension in the highs, better transient reproduction and fuller more detailed bass.
For Vref decided on a "soft" cap and the results are outstanding.
Super Linear Cathode Follower - Allan Wright
http://www.vacuumstate.com/fileupload/SP_15_Article.pdf
You can see it in the output.
Calvins buffer is an expansion of the concept. From what I understand, it is an attempt to operate the cascode in true voltage mode, keeping the drain of the buffer device(tube,jfet)constant.
http://www.vacuumstate.com/fileupload/SP_15_Article.pdf
You can see it in the output.
Calvins buffer is an expansion of the concept. From what I understand, it is an attempt to operate the cascode in true voltage mode, keeping the drain of the buffer device(tube,jfet)constant.
No, I just added a new shunt to the previous folded build.
But I would like to try the SLCF....🙂
But I would like to try the SLCF....🙂
For what? To make a super linear buffer for this open loop some second harmonic climbing with level phono? The B1 type buffer it has suits it better IMO. Its like adding precision optics to a slingshot otherwise.😀
This is why I have a DCB1 instead of the final buffer, so the coupling cap can be .1 uF and be of top quality.
Rush
No argument from me. I knew RCruz had been talking of Calvin buffer with Joachim, so i was unsure of how far he had taken it. Other than possibly adding the B1 on the output, like Rush, I see no reason to change anything. Sounds to good.
Your boards are actually soldered. I haev to get a couple 33r resistors to make 43R on output stage Rs and then they will be headed your way.
There is a b1 already in the folded just before the output cap when Rush's has a DCb1 for using a smaller cap. Simple repositioning.😉
Thanx! Will be waiting.🙂
Thanx! Will be waiting.🙂
B1, DCB1. I am so confused😀
Is shipping within Europe cheaper than to continental US. If so I might send RCruz his TX2575 resistors through yuo if it will save on postage and you dont mind.
Is shipping within Europe cheaper than to continental US. If so I might send RCruz his TX2575 resistors through yuo if it will save on postage and you dont mind.
I am interested in buffers, but Calvin's works with simetrical psu... not applicable anyway.
And in this case I was only reporting about changes made in the shunt.
And in this case I was only reporting about changes made in the shunt.
They both use a coupling cap in this case, its only you save on a bigger cap when adding a further supply. If the negative polarity supply is already there in a combo pre, then why not.
I know. I have built both, just forgot the DC part in my writing above. I have learned a few things.😀
I like Rush's idea very much....
Ricardo, now it's up to you: make a (no-longer-simplistic) folded cascode RIAA front end + DCB1 o/p stage with six (!) SSLV V.1.2R 😀
Ricardo, now it's up to you: make a (no-longer-simplistic) folded cascode RIAA front end + DCB1 o/p stage with six (!) SSLV V.1.2R 😀
Allready have a dcb1 with two v12r
So maybe I could power the folded with four (instead of two) v12r ad get to the inline six.
I like the inline six sound but even more the v12... with smaller pistons... they really scream.
So maybe I could power the folded with four (instead of two) v12r ad get to the inline six.
I like the inline six sound but even more the v12... with smaller pistons... they really scream.