Mpp - Page 269 - 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 11th September 2011, 08:58 AM   #2681
MiiB is offline MiiB  Denmark
diyAudio Member
 
Join Date: May 2005
Location: Denmark
I know it can be balanced so there's no DC out...my concern is thermal drift.....simulation is one thing reality another...and it just may be so that all balances out and all works brilliantly with no offset problem,,
if not i believe it would be good to mapped the means to isolate the possible drift...Ie by separation of the two stages or to add it at the output..
  Reply With Quote
Old 11th September 2011, 11:18 AM   #2682
RCruz is offline RCruz  Switzerland
diyAudio Member
 
RCruz's Avatar
 
Join Date: Sep 2006
Location: Wallis
Blog Entries: 1
Thank you Miib

Why do you call it oneshot ?
__________________
RC
  Reply With Quote
Old 11th September 2011, 11:21 AM   #2683
MiiB is offline MiiB  Denmark
diyAudio Member
 
Join Date: May 2005
Location: Denmark
the full riaa correction in one-bundle...enough gain to work with MC's...
  Reply With Quote
Old 11th September 2011, 02:31 PM   #2684
diyAudio Member
 
Joachim Gerhard's Avatar
 
Join Date: Mar 2009
Post 2679, are you sure that the buffer fets will conduct without a gate current in the input fet ?
  Reply With Quote
Old 11th September 2011, 03:57 PM   #2685
MiiB is offline MiiB  Denmark
diyAudio Member
 
Join Date: May 2005
Location: Denmark
according to simulation there's is 15mA through.. and no problems in conduction....would you like positive potential..??
  Reply With Quote
Old 11th September 2011, 04:10 PM   #2686
diyAudio Member
 
Joachim Gerhard's Avatar
 
Join Date: Mar 2009
No, i just wonder if it works.
  Reply With Quote
Old 11th September 2011, 05:22 PM   #2687
MiiB is offline MiiB  Denmark
diyAudio Member
 
Join Date: May 2005
Location: Denmark
If you keep the 1Mohn to GND.. then to keep the RIAA-curve.. the resistor to GND must be increased to 400K..or the base response suffers..best would be if drift is not an issue and that the DC-cap is not needed...
  Reply With Quote
Old 11th September 2011, 05:25 PM   #2688
diyAudio Member
 
Joachim Gerhard's Avatar
 
Join Date: Mar 2009
Yes, the resistor value can be split. I did that before. We could of cause use a servo. More parts though and a discussion what sounds better : cap or servo.
  Reply With Quote
Old 11th September 2011, 06:07 PM   #2689
MiiB is offline MiiB  Denmark
diyAudio Member
 
Join Date: May 2005
Location: Denmark
let's see how it drifts......
A 100 nF cap can be of very very good quality...but will for sure make som kind of imprint and form some kind of signature on the circuit...but then again so will anything else also...
  Reply With Quote
Old 11th September 2011, 10:37 PM   #2690
RCruz is offline RCruz  Switzerland
diyAudio Member
 
RCruz's Avatar
 
Join Date: Sep 2006
Location: Wallis
Blog Entries: 1
There are some inexpensive High Quality Teflon 100n caps available

These are very transparent sounding (for a teflon) and very extended.

Servo might be good but it would add to the complexity of the circuit.
__________________
RC
  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 06:57 AM.


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