What to do with two 30V,50A transformer??? - diyAudio
 What to do with two 30V,50A transformer???
 User Name Stay logged in? Password
 Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read Search

 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
 Thread Tools Search this Thread
 22nd May 2007, 02:09 AM #1 diyAudio Member     Join Date: Dec 2004 Location: Bukit Mertajam What to do with two 30V,50A transformer??? Build a BTL design or a multichannel set???
 22nd May 2007, 03:07 AM #2 diyAudio Member     Join Date: Jun 2006 Location: North Californie 150 volt/amps ... assuming center tap, +/- 30 VAC, perfect for a single channel 150 watt amp ... __________________ Over compression is a problem with modern CD recordings [recent changes]
Account disabled at member's request

Join Date: Mar 2007
Quote:
 Originally posted by FastEddy 150 volt/amps ... assuming center tap, +/- 30 VAC,

+/- 30 volts would be 60 x 50 = 300VA.

PS: If you don't need it, I'll take it

diyAudio Member

Join Date: Nov 2004
Location: Montreal
Quote:
 Originally posted by MJL21193 +/- 30 volts would be 60 x 50 = 300VA.

You miss one zero, 60 X 50 = 3000 VA

 22nd May 2007, 03:51 AM #5 diyAudio Member     Join Date: Oct 2003 Location: Near the sea 30V * 50A = 3000W __________________ I use to feel like the small child in The Emperor's New Clothes tale
 22nd May 2007, 03:55 AM #6 diyAudio Member     Join Date: Dec 2004 Location: Bukit Mertajam Yes.Two 30-0V with 50A each.Weight more than 20kgs each and they are EI transformers. 1500VA x 2,but have no idea to use them properly.
Account disabled at member's request

Join Date: Mar 2007
Quote:
 Originally posted by Chartal You miss one zero, 60 X 50 = 3000 VA

Ooops! My boo-boo.

Account disabled at member's request

Join Date: Mar 2007
Quote:
 Originally posted by Leolabs Yes.Two 30-0V with 50A each.Weight more than 20kgs each and they are EI transformers. 1500VA x 2,but have no idea to use them properly.

Too big for your needs? Just because they can supply 50A, doesn't mean you have to have something that can draw that much. For an amp, you are limited by the speakers impedance and the voltage.
Would be great for a 6-8 channel amp, though.
Or, sell it on Ebay.

 22nd May 2007, 04:56 AM #9 diyAudio Member     Join Date: Jun 2006 Location: North Californie Too bad ... 0 to 30 VAC with no center taps and 3k watts ... probably used for an old computer server or such. Not much good for audio unless, as suggested, you want to do multiple amps in one chassis. ... like four or five channels of 100 watts / each MOSFET amp = a difficult design as quality goes down with lower supply voltages and 0-30 VAC will also require a significant split gound simulation to get +21 /0/- 21 VDC ... (Sorry about that multiply error = a senior moment?) __________________ Over compression is a problem with modern CD recordings [recent changes]
 22nd May 2007, 05:22 AM #10 diyAudio Member     Join Date: Jun 2002 Location: Left Coast If my (hopefully conservative) calculations are right: Take two 0-30V transformers and wire them in series so that you get one 30-0-30. VA = 2 x (50x30)= 3000VA (I think VA works that way). Unless you are going to get into voltage doublers, this will let you power a number of ~80W (nominal 8 ohm load) amplifiers. Easily 7 channels of amplification with current to spare. If you wanted to try a voltage doubler (big diodes suggested) you could power 5 channels at 350 Watts with just enough left over to handle 4 ohm speakers. Add some big heat sinks and get a big friend, or hand truck to move these around.

 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 OffTrackbacks are Off Pingbacks are Off Refbacks are Off Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post Elias Tubes / Valves 176 11th March 2013 10:35 PM ironradio Tubes / Valves 6 28th December 2008 06:05 PM contaxchen Tubes / Valves 10 14th January 2005 11:43 AM tone Tubes / Valves 7 11th February 2003 09:57 AM tone Tubes / Valves 15 2nd February 2003 05:36 AM

 New To Site? Need Help?

All times are GMT. The time now is 12:22 AM.

 Home - Contact Us - Advertise - Rules - diyAudio Store - Sponsors - Archive - Privacy Statement - Terms of Service - Top - Opt-out policy

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2016 DragonByte Technologies Ltd.
Copyright ©1999-2016 diyAudio

Content Relevant URLs by vBSEO 3.3.2
Wiki