Symasym 5.3 - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State

Solid State Talk all about solid state amplification.

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 April 2010, 01:50 PM   #1
jandr49 is offline jandr49  United Kingdom
diyAudio Member
 
Join Date: Feb 2010
Default Symasym 5.3

Hi

Would Symasym 5.3 be considered a suitable project for a relative beginner - Perhaps I shouldn have asked this question earlier but I got a bit carried away a few months ago and started building it, but now I'm close to being able to power it up and putting it in a case I'm starting to get cold feet and wonder if I've taken on too much.

Encouragment please!!!!

Richard
  Reply With Quote
Old 16th April 2010, 02:55 PM   #2
diyAudio Member
 
Join Date: Jan 2008
You already got this far, so means to say you're almost done. As long as you followed the instructions on the documentation, then you're just doin' fine.
  Reply With Quote
Old 16th April 2010, 03:03 PM   #3
Bigun is offline Bigun  Canada
diyAudio Member
 
Bigun's Avatar
 
Join Date: Jan 2009
Blog Entries: 2
It's the best time, the moment of power-up, GO FOR IT !

Some precautions I took:

a) double check that all the parts are the correct ones and installed correctly - it's easy to have simple errors like the output drivers transposed (i.e. the NPN device is where the PNP should be and vice versa)

b) measure the resistance between the + and - supply rails with an ohmeter - a value of close to zero means stop, something ain't right

c) for the first power-up take the fuses out of the power rails and replace them with large 10 Ohm resistors. Don't connect speakers. I assume you have fuses, if not just put the resistors into the power feed. If the resistors get very hot you have something wrong. If the resistors are OK you can look for things like excessive dc-offset at the output so you don't inadvertently hurt your speakers. These resistors will drop the voltage so your amp will not be at full operating voltage but it does provide a crude current limit. It saved my 2nd amplifier build from blowing up.

d) if all looks good, pop in the real fuses and give it a go !
__________________
"The test of the machine is the satisfaction it gives you. There isn't any other test. If the machine produces tranquility it's right. If it disturbs you it's wrong until either the machine or your mind is changed." Robert M Pirsig.
  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
Troubleshooting your Symasym anatech Solid State 235 22nd September 2011 09:40 PM
blowtorch + symasym ? LennyK Solid State 2 13th November 2009 08:20 PM
symasym 5.3 parts 406vette Parts 2 17th February 2008 07:34 PM


New To Site? Need Help?

All times are GMT. The time now is 09:10 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