Mpp - Page 852 - diyAudio
Go Back   Home > Forums > Source & Line > Analogue Source

Analogue Source Turntables, Tonearms, Cartridges, Phono Stages, Tuners, Tape Recorders, etc.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 14th March 2013, 10:14 AM   #8511
diyAudio Member
 
Joachim Gerhard's Avatar
 
Join Date: Mar 2009
Stefanoo is convinced the the Teflon-copper V-caps are superior to anything else.
I can not commend on this. I simply have not tried them.
There is one person i trust, Hesener, that also bought a set of V-Caps so i await his response.
buzzford there is no new schematic that i am aware of. I started to work on a single ended Hybrid ( Fet, BJT, Tube ) phono coined Cro Magnon but i will not proceed with that project.
Where i am working on is a balanced input for the Paradise. That is in the beta stage.
Maybe today i will finish basic input stage. If i can get it work satisfactory i will explore
the option to fit it into the Paradise.
Stefanoo has opened a tread called " Masterpiece" in an attempt to better the Paradise.
Unfortunately he did not come up with a schematic so far. What he did instead was asking for help and schematics from me, MIIB and others. We gave him some hints and circuits but nothing seem to satisfy him. Also i do not feel obliged to make him a circuit.
That resulted in his comment that the contribution of MIIB was useless.
Fortunately he did not attack me directly so i am still willing to contribute on the Masterpiece thread. I am just not willing to do all the design work.
Stefanoo claims that he has a superior sound system and extremely good ears.
He said the Paradise is ill difined in the bass, sounds tired and does not resolve well in the treble.
He does not tell what recordings he uses plus what the alternative, better sounding phono stage is. He likes the big Audio Research Ref and the Boulder but i have no idea if he has them home.

SMD transistors : i think Zetex makes very good ones. Some posts ago i have mentined a pair that is low noise and high Hfe. I just can not remember the names.

Last edited by Joachim Gerhard; 14th March 2013 at 10:21 AM.
  Reply With Quote
Old 14th March 2013, 10:19 AM   #8512
diyAudio Member
 
Joachim Gerhard's Avatar
 
Join Date: Mar 2009
I use Polystyren caps in my RIAAs sometimes bypassed with teflon trimmers.
I also use Roederstein P-P and Mundorf silver-gold-oil.
Also RIFA PHE426 and RIFA PPS SMD.
All of this caps have very low distortion, sure under -120dB so when the V-Caps sound better it must be another reason.
I do not think that it is dielectric absorption or ERS.
In the Paradise the RIAA caps are driven by a high impedance constant current source ( the mirrors). That swaps any small parasitic there will be.

Last edited by Joachim Gerhard; 14th March 2013 at 10:22 AM.
  Reply With Quote
Old 14th March 2013, 10:24 AM   #8513
RCruz is offline RCruz  Switzerland
diyAudio Member
 
RCruz's Avatar
 
Join Date: Sep 2006
Location: Wallis
Blog Entries: 1
Hi buzz... are you planning to build the paradise with SMD trannies ?

PS: styroflex are quite stable but difficult to handle due to it's sensivity to heat.
Teflon is even more stable but the "nice" ones are very expensive.
I am now building a rig with russian NOS teflons (inexpensive but bulky) and report back.

I allready experimented with teflon in the riaa circuit and found very good extension but somehow lacking in "body".

Untill now, my preference is with polystyrene and tin foil. These are full bodied, sweet sounding with ultra minute detail.
Plain styroflex (polystyrene on alu foil) can sound dry.
Micas are really speedy and provide loads of detail but can sound edgy.
__________________
RC

Last edited by RCruz; 14th March 2013 at 10:29 AM.
  Reply With Quote
Old 14th March 2013, 10:28 AM   #8514
diyAudio Member
 
buzzforb's Avatar
 
Join Date: Oct 2010
Location: Burlington, NC
Quote:
Originally Posted by Joachim Gerhard View Post
I use Polystyren caps in my RIAAs sometimes bypassed with teflon trimmers.
I also use Roederstein P-P and Mundorf silver-gold-oil.
Also RIFA PHE426 and RIFA PPS SMD.
All of this caps have very low distortion, sure under -120dB so when the V-Caps sound better it must be another reason.
I do not think that it is dielectric absorption or ERS.
In the Paradise the RIAA caps are driven by a high impedance constant current source ( the mirrors). That swaps any small parasitic there will be.
Quote:
Originally Posted by Joachim Gerhard View Post
He said the Paradise is ill difined in the bass, sounds tired and does not resolve well in the treble.


SMD transistors : i think Zetex makes very good ones. Some posts ago i have mentined a pair that is low noise and high Hfe. I just can not remember the names.
Funny, that is the exact opposite description that i have hard from everyone else. Anyhow. It must have been the balanced version i saw. I have been looking at this also, not because of superiority, just fun. I have folded simplsitic now, and haev your Paradise in the batters box. Thanks about the recommendations. I looking at NOS polystyrenes recommended by Jacco. He is a walking part catalogue. Ill give a look at the ones you mentioned.
__________________
...Shape the sound , Man!
  Reply With Quote
Old 14th March 2013, 10:31 AM   #8515
diyAudio Member
 
buzzforb's Avatar
 
Join Date: Oct 2010
Location: Burlington, NC
Quote:
Originally Posted by RCruz View Post
Hi buzz... are you planning to build the paradise with SMD trannies ?

PS: styroflex are quite stable but difficult to handle due to it's sensivity to heat.
Teflon is even more stable but the "nice" ones are very expensive.
I am now building a rig with russian NOS teflons (inexpensive but bulky) and report back.

I allready experimented with teflon in the riaa circuit and found very good extension but somehow lacking in "body".

Untill now, my preference is with polystyrene and tin foil. These are full bodied, sweet sounding with ultra minute detail.
Plain styroflex (polystyrene on alu foil) can sound dry.
Micas are really speedy and provide loads of detail but can sound edgy.
I purchased some of the old FT series teflon, as you did. Haven't tried them yet. SpaceEggCorp tesetd some of the older teflons and showed they were not so well suited for RIAA, but i forget which ones he tried. I am really digging this SMD thing. Its all about fun, you just get the byproduct of amazing performance. Vishay PLT have ppm of 5. WHAT! I may try some form of SMD RIAA, but not for a while. I was asking about low noise bjt's for output stage of balanced pre.
__________________
...Shape the sound , Man!

Last edited by buzzforb; 14th March 2013 at 10:34 AM.
  Reply With Quote
Old 14th March 2013, 11:00 AM   #8516
diyAudio Member
 
Joachim Gerhard's Avatar
 
Join Date: Mar 2009
You can try Zetex FMMT618TA, 718TA.
Beware that they have only 20V Vce.
There are versions of this transistors that can stand more voltage.
For example FMMT619, 719 can stand 40V.
There are some that have even more.
You can find that in the data sheet.
  Reply With Quote
Old 14th March 2013, 11:02 AM   #8517
diyAudio Member
 
Joachim Gerhard's Avatar
 
Join Date: Mar 2009
here :
FMMT618 Datasheet pdf - NPN Low Sat Transistor - Zetex Semiconductors

I also find that Stefanoos description of the Paradise sound is wrong.
I find it sounds very dynanic and open.
  Reply With Quote
Old 14th March 2013, 11:02 AM   #8518
diyAudio Member
 
buzzforb's Avatar
 
Join Date: Oct 2010
Location: Burlington, NC
Thank you. One last question. Have you ever given PPS caps a try? Superior stabiltiy, but doesn't say much for their sound.
__________________
...Shape the sound , Man!
  Reply With Quote
Old 14th March 2013, 11:16 AM   #8519
just another
diyAudio Moderator
 
wintermute's Avatar
 
Join Date: Aug 2003
Location: Sydney
Blog Entries: 22
I've deleted a couple of posts. I've also Suggested to Stefanoo that he has made his opinion known and should move on. For that to be successful I would appreciate it if no one else takes him to task over his statements.
__________________
Any intelligence I may appear to have is purely artificial!
Some of my photos
  Reply With Quote
Old 14th March 2013, 11:17 AM   #8520
diyAudio Member
 
Joachim Gerhard's Avatar
 
Join Date: Mar 2009
I use RIFA PPS SMD all the time.
I think they have " no sound ".
That was also the opinion of Allen Wright ( RIP ) of Vacuum State.
I can tell you that guy was a tweak master.
His Real Time Preamp landed several times in the reference class. There are some that think that this is the best Preamp ever made.
The only problem with the PPS SMDs is that they are not easy to get at better then 5% tolerance. I found in praxis that they match better then this.
I select and measure all of my RIAA caps anyway.

Last edited by Joachim Gerhard; 14th March 2013 at 11:23 AM.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



New To Site? Need Help?

All times are GMT. The time now is 11:17 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2