Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Toroidal hum/buzz. Modifyed Venus PS-400A
Toroidal hum/buzz. Modifyed Venus PS-400A
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 May 2010, 03:35 PM   #1
nobrain is offline nobrain
diyAudio Member
 
Join Date: Apr 2010
Default Toroidal hum/buzz. Modifyed Venus PS-400A

I'm modifying Venus toroidal transformer to product +/-60VDC. It produces lousy hum/buzz noise when I connected the output power transistor (load) to it. I don't hear the noise when turn it on without load.

Here is the main problem:
The primadary of toroidal consists of 6 wires(AC input), I believed it used for multiple AC input/frequency selection (example 115V/50Hz). I don't know which one are for 120VAC/60HZ. I'm more guessing and playing with it.

1) How do we find out which input wire are for 120VAC/60Hz? I appreciate if one can give me advised and idea.
2) Did anyone know the information of BTS-Venus power supply Model# PS-400A? I searched but I didn't find any useful information.
3) The label on toroidal shown Talema, 57-014852-003, 1569-XP7S4A-M, 0893, Class B1 Insulation.
4) Many toroidal transformers had 2 coils which was used for 120V/240V. What if I just use only one coil (for 120VAC) and leave another open (float)?

Thanks
  Reply With Quote

Reply


Toroidal hum/buzz. Modifyed Venus PS-400AHide 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
is toroidal transformer hum,buzz dangerous?? gbolly Chip Amps 4 18th May 2009 11:57 AM
opamp hum and buzz problem zeus_threat Analog Line Level 12 31st July 2008 05:34 PM
hum/buzz with pot all the way up woodturner-fran Tubes / Valves 19 24th September 2007 01:31 PM
transformer hum / buzz getting into B+? cbutterworth Tubes / Valves 3 18th August 2007 02:49 AM
need help with carputer install, buzz/hum Chris in NH Car Audio 6 27th September 2004 05:04 AM


New To Site? Need Help?

All times are GMT. The time now is 08:39 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki