help me about NP D-1 - diyAudio
Go Back   Home > Forums > Amplifiers > Pass Labs

Pass Labs This forum is dedicated to Pass Labs discussion.

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 27th October 2009, 01:38 PM   #1
crt is offline crt  Indonesia
diyAudio Member
 
crt's Avatar
 
Join Date: Apr 2007
Default help me about NP D-1

hallo everyone
sorry for my poor english

i almost finish to build Pass D-1 I/V (single version) with Shunt Reg. (salas)

[IMG]Click the image to open in full size.[/IMG]

click here for bigger image

http://img25.imageshack.us/img25/7227/p1030083copy.jpg


i have several question :
-20 K pot for ?
-i had buy 20 IRF610 and want to match them.
if i want to get 4 match, should i buy some more ?
and how to match them ? (i already read pass labs article about matching MOSFET but still confuse) at what current should i match them ?
-for output caps, can i ignore it ?
i will use Pass B-1 buffer that already have a DC blocking caps.

Right now, i dont have a DAC yet .
but i planning to use it with PCM1704

Regards
La Ode

Last edited by crt; 27th October 2009 at 01:58 PM.
  Reply With Quote
Old 2nd November 2009, 12:02 PM   #2
diyAudio Member
 
Join Date: Aug 2008
Quote:
Originally Posted by crt View Post
hallo everyone
sorry for my poor english

i almost finish to build Pass D-1 I/V (single version) with Shunt Reg. (salas)

[IMG]Click the image to open in full size.[/IMG]

click here for bigger image

http://img25.imageshack.us/img25/7227/p1030083copy.jpg


i have several question :
-20 K pot for ?
-i had buy 20 IRF610 and want to match them.
if i want to get 4 match, should i buy some more ?
and how to match them ? (i already read pass labs article about matching MOSFET but still confuse) at what current should i match them ?
-for output caps, can i ignore it ?
i will use Pass B-1 buffer that already have a DC blocking caps.

Right now, i dont have a DAC yet .
but i planning to use it with PCM1704

Regards
La Ode
- 20k pot is for adjust dc at input to 0v.
- i think its better to use out caps at d1
but you can ignore input caps at b1

btw bole minta eagle file ny pak?
hehehehehe
  Reply With Quote
Old 4th November 2009, 12:18 PM   #3
diyAudio Member
 
Join Date: Feb 2007
Location: Germany
Selamat siang!

Quote:
-i had buy 20 IRF610 and want to match them.
if i want to get 4 match, should i buy some more ?
and how to match them ? (i already read pass labs article about matching MOSFET but still confuse) at what current should i match them ?
If your IRFs are from the same wafer 20 should be suficient.

For matching it's best if you use the same voltage and current you will operate them later.

Best wishes

Ralf
__________________
My chain: DIY CD-Pro2LF -> Pass D1 clone -> Pass Aleph P1.7 clone -> Aleph X -> Duetta Top ->
  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 01:56 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