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 24th June 2012, 10:31 AM   #2021
Dimitris
diyAudio Member
 
dimkasta's Avatar
 
Join Date: May 2010
Location: Athens
Quote:
Originally Posted by rjm View Post
The output noise of the phonoclone is defined by the op amp, not the input resistors, so there is technically no advantage in using low noise resistors.
But if there is some noise on the input from those resistors, isn t that being amplified with the rest of the signal?
  Reply With Quote
Old 25th June 2012, 10:52 AM   #2022
rjm is offline rjm  Japan
Richard Murdey
diyAudio Member
 
rjm's Avatar
 
Join Date: May 2004
Location: Kyoto
Blog Entries: 94
Yes, but the additional noise from the amplification circuit itself is larger.
__________________
RJM Audio (phonoclone.com / G+)
  Reply With Quote
Old 10th July 2012, 08:18 AM   #2023
bucurb is online now bucurb  Romania
diyAudio Member
 
Join Date: Sep 2004
Location: Bucharest
Default VSPS 300i schematic

Where could I find actual VSPS 300i complete schematic, please?

Thank you!
  Reply With Quote
Old 10th July 2012, 08:29 AM   #2024
Dimitris
diyAudio Member
 
dimkasta's Avatar
 
Join Date: May 2010
Location: Athens
Here you go
RJM Audio - The Very Simple Phono Stage
  Reply With Quote
Old 10th July 2012, 04:51 PM   #2025
rjm is offline rjm  Japan
Richard Murdey
diyAudio Member
 
rjm's Avatar
 
Join Date: May 2004
Location: Kyoto
Blog Entries: 94
300i is the same schematic as the current board revision 300m so you can download the schematic including the voltage regulator from the PCB page.
__________________
RJM Audio (phonoclone.com / G+)
  Reply With Quote
Old 11th July 2012, 03:51 PM   #2026
bucurb is online now bucurb  Romania
diyAudio Member
 
Join Date: Sep 2004
Location: Bucharest
Default Thanks!

Thanks,

I did fix all issues.
In the VSPS 300 Dual-Mono MM Phono Stage with X-reg setup it's furnished, for capacitors C3, two white coaxial AV 1.7uF (1.9uF measured). Did someone try other capacitor brands please? Any comments about C3, please?
Warm regards,
Ion
  Reply With Quote
Old 11th July 2012, 05:17 PM   #2027
Dimitris
diyAudio Member
 
dimkasta's Avatar
 
Join Date: May 2010
Location: Athens
Caps are like ice cream... depends on what you like and how much money you got to spend
If your pockets are deep enough, they can even have gold in them (both ice cream and caps )
Now before you go around changing stuff, make sure that you give your phono a chance to properly break-in. That includes both C3 and the regulator caps, inner and outer wiring and the entire construction in general. From my experience, a month of moderate daily listening is more or less enough. And changing as much as a bridge wire or resoldering a component can bring the process back for the system.
After that, you can start switching stuff, giving them in turn enough time to break-in before you make any judgement on their performance.
Now if you need a more specific answer on cap brands, you will have to balance yourself price and performance expectations. Personally I also took into account my personal no-specific-reason liking towards brands and looks (yeah I admit it... I m shallow). I tried the vishays that Richard sent me with the kit for a month or so, then switched to Mundorf Supremes (no oil, no gold, plain black ones). A friend also built a p2p phono very close to VSPS and tried Solen and Auricaps, but he is using a custom made transformer stepup that I really do not like, and he keeps switching them before (imho) they have the chance to break-in and get comfortable.
From my up till now experience, I still vote for Mundorf. I would like to test some VCaps at some point, but for now my pockets a bit shallow...
  Reply With Quote
Old 12th July 2012, 02:09 AM   #2028
rjm is offline rjm  Japan
Richard Murdey
diyAudio Member
 
rjm's Avatar
 
Join Date: May 2004
Location: Kyoto
Blog Entries: 94
C3 is worth upgrading from stock, but you probably have to spend at least $15 ea. for something that sounds significantly better. Suggest 2.2 uF Multicap or Mundorf.
__________________
RJM Audio (phonoclone.com / G+)
  Reply With Quote
Old 12th July 2012, 04:12 AM   #2029
bucurb is online now bucurb  Romania
diyAudio Member
 
Join Date: Sep 2004
Location: Bucharest
Hello,

I appreciate your answers. Thank you for your ideas.
In my opinion $15 x 2 it's less important. Your experience is very important for me.
I would wish make the sound of my VSPS as good as, reasonable, possible.

More details about what Mundorf, in your experience, would be more appropriate for VSPS 300i, please?
Or what Multicap capacitor, please?

Have a nice day!

Warm regards,
Ion
  Reply With Quote
Old 12th July 2012, 02:55 PM   #2030
rjm is offline rjm  Japan
Richard Murdey
diyAudio Member
 
rjm's Avatar
 
Join Date: May 2004
Location: Kyoto
Blog Entries: 94
As dimkasta wrote above, its really not a case of what is appropriate or not but rather what you feel comfortable with, and comfortable paying...
__________________
RJM Audio (phonoclone.com / G+)
  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 06:45 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