symasym 5.3 parts - diyAudio
Go Back   Home > Forums > Design & Build > Parts
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Parts Where to get, and how to make the best bits. PCB's, caps, transformers, 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 16th February 2008, 07:25 PM   #1
diyAudio Member
 
Join Date: Jan 2008
Default symasym 5.3 parts

I plan to build a symasym 5 but am having a hard time finding all the components, some of the resistors specificly. If anyone out there has built one please let me know where you found everything. Is there a consensus on the best supplier to order from? I've tried Allied, B&D, Newark.
  Reply With Quote
Old 16th February 2008, 07:28 PM   #2
diyAudio Moderator
 
pinkmouse's Avatar
 
Join Date: Apr 2002
Location: Rotherham, England
Here's Aak's BOM with part numbers and sources.
Attached Files
File Type: pdf symasym_aaks_pcb_bom.pdf (15.6 KB, 145 views)
__________________
Rick: Oh Cliff / Sometimes it must be difficult not to feel as if / You really are a cliff / when fascists keep trying to push you over it! / Are they the lemmings / Or are you, Cliff? / Or are you Cliff?
  Reply With Quote
Old 17th February 2008, 07:34 PM   #3
diyAudio Member
 
Join Date: Jan 2008
Thanks you, that helps alot.
  Reply With Quote
Old 11th June 2017, 07:11 PM   #4
diyAudio Member
 
Join Date: Jun 2017
Hi, i was build symasym 5 , but i have problem with biasing, why i can't make biasing at 24 mv always read 0 volt,?
  Reply With Quote
Old 11th June 2017, 07:25 PM   #5
Mooly is offline Mooly  United Kingdom
diyAudio Moderator
 
Mooly's Avatar
 
Join Date: Sep 2007
If it is this one:

SymAsym5 - Project

then you need to check that the voltage across the 100nF cap that is connected to the vbe multiplier increases as you turn the bias preset. You need at least somewhere in the region of 2.5 volts before the output stage will conduct.

Is the amplifier otherwise OK, having no DC offset and playing music OK ?
  Reply With Quote
Old 11th June 2017, 07:39 PM   #6
diyAudio Member
 
Join Date: Jun 2017
Did you mean at point 100nf 2.5 volt with ground or the other one, sory if my english is not good
  Reply With Quote
Old 11th June 2017, 07:44 PM   #7
diyAudio Member
 
Join Date: Jun 2017
It's just 0.50, how can i make it be 2.5 volt?
  Reply With Quote
Old 12th June 2017, 06:11 AM   #8
Mooly is offline Mooly  United Kingdom
diyAudio Moderator
 
Mooly's Avatar
 
Join Date: Sep 2007
2.5 volts reading across the cap, not to ground. That's an approximate figure, if the voltage is significantly below that with the bias preset turned up then you have some construction or component problem.

You should also have around 0.34 volts across R10 which is a 68 ohm.
  Reply With Quote
Old 12th June 2017, 03:19 PM   #9
diyAudio Member
 
Join Date: Jun 2017
Ok, already, but still like before, i will cek all component, thanks, i will ask you than if any problem with my symasym
  Reply With Quote
Old 13th June 2017, 03:49 PM   #10
diyAudio Member
 
Join Date: Jun 2017
Hi mooly i already checking and recheck all component, do you think that pcb's problem?, i used fiber
  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
Symasym PCB Khron Solid State 58 17th May 2012 07:18 AM
modified symasym amp, need help space2000 Solid State 3 4th June 2008 06:28 AM
PARTS PARTS PARTS!!! Infocus Powerview 820, triplet, ballast, light, power supply!!! marioinla Swap Meet 1 31st August 2004 04:22 PM


New To Site? Need Help?

All times are GMT. The time now is 11:09 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2
Wiki