Chip amp power supply- a beginners guide - Page 19 - diyAudio
Go Back   Home > Forums > Amplifiers > Chip Amps

Chip Amps Amplifiers based on integrated circuits

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 2009, 10:35 PM   #181
diyAudio Member
 
Tripmaster's Avatar
 
Join Date: Feb 2008
Location: UK
Here are a couple more close-ups

Click the image to open in full size.

Click the image to open in full size.
  Reply With Quote
Old 17th February 2009, 08:08 AM   #182
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
one switch of ON/OFF, the other is the bulb BYPASS.

Is the bulb off when there is no load and the ON switch is held down?
Does the bulb react in any way when you connect a load and hold the ON switch down?
Can you arrange a big load to light the bulb? and does it o off when you press the BYPASS?
__________________
regards Andrew T.
  Reply With Quote
Old 17th February 2009, 08:18 AM   #183
Nuuk is offline Nuuk  United Kingdom
diyAudio Member
 
Nuuk's Avatar
 
Join Date: Feb 2003
Location: Somerset, SW England
Sounds to me like you have a short connecting the input supply to the output! Double check you have not left any tracks linking parts of the circuit where they are not meant to.
__________________
The truth need not be veiled, for it veils itself from the eyes of the ignorant.
  Reply With Quote
Old 17th February 2009, 10:10 AM   #184
diyAudio Member
 
audio1st's Avatar
 
Join Date: May 2005
Location: Foxton, CAMBS..
Hi Richard,

Congratulations on having the same problem on both rails

I'm with Nick on the uncut tracks.
I bet your sick of looking at it
  Reply With Quote
Old 17th February 2009, 11:45 AM   #185
diyAudio Member
 
audio1st's Avatar
 
Join Date: May 2005
Location: Foxton, CAMBS..
Richard,
Check the cuts around the BD911..
Attached Images
File Type: jpg top3.jpg (72.8 KB, 636 views)
  Reply With Quote
Old 17th February 2009, 12:31 PM   #186
mjf is offline mjf  Austria
diyAudio Member
 
Join Date: Jan 2009
Location: Austria
hello.
picture post 181 looks like there is a res solderd to the screw.....isn't the screw a collector pin? perhaps you connected the collector with the emitter by a res (100 ohm?).......
perhaps it can help............
greetings............
  Reply With Quote
Old 17th February 2009, 02:00 PM   #187
diyAudio Member
 
Tripmaster's Avatar
 
Join Date: Feb 2008
Location: UK
Quote:
Originally posted by mjf
hello.
picture post 181 looks like there is a res solderd to the screw.....isn't the screw a collector pin?


A trick of the light
  Reply With Quote
Old 17th February 2009, 02:21 PM   #188
diyAudio Member
 
Tripmaster's Avatar
 
Join Date: Feb 2008
Location: UK
Quote:
Originally posted by AndrewT
one switch of ON/OFF, the other is the bulb BYPASS.

Is the bulb off when there is no load and the ON switch is held down?
Does the bulb react in any way when you connect a load and hold the ON switch down?
Can you arrange a big load to light the bulb? and does it o off when you press the BYPASS?
Hi Andrew

When I connect the light bulb and press the on button the light, lights up for a second and then goes out. This happens when I have a 230R resistor between V- and ground


I will check the other combinations tonight and will also increase the value of the test resistor

Richard
  Reply With Quote
Old 17th February 2009, 02:22 PM   #189
diyAudio Member
 
Tripmaster's Avatar
 
Join Date: Feb 2008
Location: UK
Quote:
Originally posted by audio1st
Richard,
Check the cuts around the BD911..

Will do!
  Reply With Quote
Old 17th February 2009, 09:57 PM   #190
diyAudio Member
 
Tripmaster's Avatar
 
Join Date: Feb 2008
Location: UK
Quote:
Originally posted by AndrewT
one switch of ON/OFF, the other is the bulb BYPASS.

Is the bulb off when there is no load and the ON switch is held down?
Does the bulb react in any way when you connect a load and hold the ON switch down?
Can you arrange a big load to light the bulb? and does it o off when you press the BYPASS?

I am using a 40w bulb for this test


Q1> Is the bulb off when there is no load and the ON switch is held down?

[COLOR=black]A1> The bulb lights for less than a second


Q2> Does the bulb react in any way when you connect a load and hold the ON switch down?


A2> As above


Q3> Can you arrange a big load to light the bulb? and does it o off when you press the BYPASS?

A3> I placed a 1K3 resistor between V- and Ground, the bulb lights as above and the bypass switch has no effect.
  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
A Beginners Guide to Enclosure Alterations Bork Multi-Way 7 12th January 2009 02:10 AM
beginners ecl82 power supply emil_86 Tubes / Valves 15 25th September 2004 05:20 AM


New To Site? Need Help?

All times are GMT. The time now is 07:07 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