threshold sl10 - 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 11th January 2006, 06:10 PM   #1
diyAudio Member
 
Join Date: Jun 2005
Location: drachten
Default threshold sl10

Hi There!

I got me a threshold sl10. It sounds great. better as the modified AVM. Instead of building me a P1.7, maybe I will do that later on.

Now I have several questions. The power supply caps are looking allright to me and also the caps on the pre-pcb are looking allright.

In the PS there are Mallory 4700 uf 60VDC and in the pre there are Instrument devices C221-4713 and 4705. What's the value of them?

There are also 2 red silver mica caps 50PF, I think, one in each channel, are getting a little black inside. Are they no good anymore?

And again the caps are looking good, but that does not mean they will be allright, is it?

But again the sound is very good, I've never heard anything better in my set. Maybe upgrading will made it better.
Who can help me? Thanks allready! Greetings Teake.
  Reply With Quote
Old 11th January 2006, 09:03 PM   #2
The one and only
 
Nelson Pass's Avatar
 
Join Date: Mar 2001
I think the electrolytics were 470 uF at 25V or so.

The Micas should last forever, so I wouldn't worry about them.
  Reply With Quote
Old 11th January 2006, 09:12 PM   #3
diyAudio Member
 
Join Date: Nov 2004
Location: Bruchsal/Germany
Hi Teake ,
nice to hear that the Treshold sound better than that German Pre ,
no wonder for me , i had the same expirience years ago !

Greetings from Germany

Jürgen
  Reply With Quote
Old 11th January 2006, 10:28 PM   #4
diyAudio Member
 
Join Date: Jun 2005
Location: drachten
Thanks Nelson and Jurgen.
Are the 470uF/25V the bigger ones, and the smaller ones, what value do they have Nelson?
Thanks allready. Teake.
  Reply With Quote
Old 11th January 2006, 10:34 PM   #5
diyAudio Member
 
Join Date: Jun 2005
Location: drachten
Again, and there is a quad opamp in it, can I replace that too, or does it not matter, and if I should, is there a newer one on the market? Its the RC4136N. Grtz Teake.
  Reply With Quote
Old 11th January 2006, 11:38 PM   #6
Zen Mod is offline Zen Mod  Serbia
diyAudio Member
 
Zen Mod's Avatar
 
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
Quote:
Originally posted by intense-tavda
Again, and there is a quad opamp in it, can I replace that too, or does it not matter, and if I should, is there a newer one on the market? Its the RC4136N. Grtz Teake.

http://www.passlabs.com/np/SL10%20SCH.tif



if you didn't see that already

this is servo,I presume;

probably old OP is good enough for purpose
__________________
my Papa is smarter than your Nelson !
clean thread; Cook Book;PSM LS Cook Book;Baby DiyA ;Mighty ZM's Bloggg;Papatreasure;Papa...© by Mighty ZM
  Reply With Quote
Old 11th January 2006, 11:44 PM   #7
Zen Mod is offline Zen Mod  Serbia
diyAudio Member
 
Zen Mod's Avatar
 
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
besides,you can gain more if you replace that 78 and 79 regs with something better; LM317 and LM337 at least,with some PSU layout rearranging
__________________
my Papa is smarter than your Nelson !
clean thread; Cook Book;PSM LS Cook Book;Baby DiyA ;Mighty ZM's Bloggg;Papatreasure;Papa...© by Mighty ZM
  Reply With Quote
Old 11th January 2006, 11:48 PM   #8
Zen Mod is offline Zen Mod  Serbia
diyAudio Member
 
Zen Mod's Avatar
 
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
question for Master :

in your (humble ) opinion-which one is better sounding:NS10 or SL10 ?

both are soooo wonderfully simple.......

as you can see-we already trance with NS10.........

or I should post this in full range forum ........
__________________
my Papa is smarter than your Nelson !
clean thread; Cook Book;PSM LS Cook Book;Baby DiyA ;Mighty ZM's Bloggg;Papatreasure;Papa...© by Mighty ZM
  Reply With Quote
Old 11th January 2006, 11:50 PM   #9
diyAudio Member
 
Join Date: Jun 2005
Location: drachten
He Choky!
Thanks, you mean replacing the op with lm 317/337 and take a bigger elco buffering. I saw the drawing but can't see the numbers. Maybe you can? Grtz Teake
  Reply With Quote
Old 11th January 2006, 11:57 PM   #10
Zen Mod is offline Zen Mod  Serbia
diyAudio Member
 
Zen Mod's Avatar
 
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
Quote:
Originally posted by intense-tavda
He Choky!
Thanks, you mean replacing the op with lm 317/337 and take a bigger elco buffering. I saw the drawing but can't see the numbers. Maybe you can? Grtz Teake

nope;
not replacing OP with LMs

OP is operational amplifier ,used there in each stage (4 times-two in phono section and two in line section ) for servo (bringing output to DC null) purpose.

LM317 is positive and LM337 is negative reg 3-legged chips,and I meant that you use them instead 7815 and 7915, respectively
__________________
my Papa is smarter than your Nelson !
clean thread; Cook Book;PSM LS Cook Book;Baby DiyA ;Mighty ZM's Bloggg;Papatreasure;Papa...© by Mighty ZM
  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


Similar Threads
Thread Thread Starter Forum Replies Last Post
threshold SL10 - DC output pjmont Pass Labs 11 29th February 2012 07:26 AM
threshold sl10 donadi.tv Pass Labs 1 15th February 2008 04:25 PM
Threshold SL10 modified SL10User Pass Labs 10 28th September 2007 09:24 AM
Threshold sl10 fs intense-tavda Swap Meet 3 23rd December 2006 11:22 AM


New To Site? Need Help?

All times are GMT. The time now is 12:54 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