Go Back   Home > Forums > Amplifiers > Power Supplies

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 26th April 2013, 06:51 PM   #2201
diyAudio Member
 
Abraxas336's Avatar
 
Join Date: Jul 2008
Location: Frankfurt
Quote:
Originally Posted by Salas View Post
You put it to work and the voltage drop across R101 20R confirms 200mA by Ohm's law I=V/R?
As far as I can tell yes. The tool says Voltage drop is 4,25V.
__________________
Gruenschnabel
  Reply With Quote
Old 26th April 2013, 07:04 PM   #2202
Salas is offline Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
If you actually use 4 strong leds it maybe there or near there, but always confirm on the actual build in the end that the current is near your goal.
  Reply With Quote
Old 26th April 2013, 10:32 PM   #2203
Can you say Audio?
diyAudio Member
 
Join Date: Aug 2011
Location: Greenwood Village, Colorado
Ok, I could use some help mates. Here's my build:
Click the image to open in full size.

This is built for 18V, component needs 100ma, built for 250ma.

IRF built, HEXFRED 600V 8A diodes, a 1K 5W dummy load, a 10Ohm Zobel, an 1.8K R303, a 5K trimmer with the zener jumped. I'm using a 50VA 12V Amveco wired in series (24v). Also, 10000uf, 63v Nichicon KG and 10UF 100v caps.

When I power it up, the diodes and the Nichicon get very hot very quick. When I read the AC in, it's about 13v (~27v with no load). Thoughts?
  Reply With Quote
Old 26th April 2013, 10:39 PM   #2204
Can you say Audio?
diyAudio Member
 
Join Date: Aug 2011
Location: Greenwood Village, Colorado
Tested and tuned the positive build, and it'd dead on. Hmmm.
  Reply With Quote
Old 26th April 2013, 11:08 PM   #2205
Salas is offline Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
Big right side Nichicon on photo is reversed. More voltage and it would bring paper snow Xmas in da house.
  Reply With Quote
Old 26th April 2013, 11:11 PM   #2206
Salas is offline Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
The one in the negative rail.
  Reply With Quote
Old 26th April 2013, 11:19 PM   #2207
Can you say Audio?
diyAudio Member
 
Join Date: Aug 2011
Location: Greenwood Village, Colorado
Doh! That makes sense mate - thanks for chiming in to peek. Really appreciate all you do.
  Reply With Quote
Old 26th April 2013, 11:25 PM   #2208
Salas is offline Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
No worries I do worse all the time. Check if the cap got any damage by examining its top surface for being slightly bulged VS the other one or not.
  Reply With Quote
Old 26th April 2013, 11:26 PM   #2209
Can you say Audio?
diyAudio Member
 
Join Date: Aug 2011
Location: Greenwood Village, Colorado
Yea, slight bulge. Is it toast?
  Reply With Quote
Old 26th April 2013, 11:32 PM   #2210
Salas is offline Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
Half done. It would take an ESR meter to compare now and determine if its usable or not. I would recommend to just bin it if it was not an expensive part or put it aside if you got a spare until you can probably check it given an opportunity.
  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
GB Thread for Salas SSLV1.1 BiB shunt reg Tea-Bag Group Buys 1424 9th April 2014 02:33 PM
WTB : Salas SSLV1.1 BiB shunt CaNNA3IS Swap Meet 1 24th November 2013 09:43 AM
FS : 2 x Salas SSLV1.1 BiB PCB + 6 x IRF MiniKits korben69 Swap Meet 6 2nd July 2013 09:32 AM
Some VX.2 Builds CSS/XBL CSS 0 11th April 2013 05:34 PM
so who here builds amps amp builder jb Tubes / Valves 29 15th July 2005 08:23 PM


New To Site? Need Help?

All times are GMT. The time now is 02:44 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