transformer with ct or non ct?

galih · 2nd December 2009, 06:11 PM

hello guys...!
I am newbie here and I would like to ask something about transformer.
which is better, transformer with or without ct, and why?
I will use that transformer to build power supply based on the schematic by carlos fm for my gainclone lm3886. the power supply will be non regulated one.
please give me some advice!
thanx before...

Juergen Knoop · 2nd December 2009, 09:18 PM

whatever the transformer is centertapped or has dual secondaries doesn't matter.

Please avoid transformers that have only secondary winding and no centertap.
Regards

galih · 4th December 2009, 06:26 PM

can I use centertapped transformer to act as a non centertapped one?
how can I get 0-24V with centertapped transformer that has 24-ct-24?
is the transformer that has dual secondaries(0-24, 0-24) same as two non centertapped one(0-24), note :both has same VA ratings?

AndrewT · 5th December 2009, 01:09 PM

do you need a dual polarity DC supply for your circuit?

galih · 5th December 2009, 05:11 PM

yes, I do need dual polarity dc supply with two transformer, but I can not decide whether centertapped transformer or not I should use? it is hard to find transformer with dual secondary in indonesia.

AndrewT · 5th December 2009, 05:39 PM

Quote:

Originally Posted by galih

yes, I do need dual polarity dc supply with two transformer, but I can not decide whether centertapped transformer or not I should use? it is hard to find transformer with dual secondary in indonesia.

Hi,
you can make a dual polarity supply from one transformer. It must be either a centre tapped or a dual secondary.

The dual secondary can be converted to a centre tapped by linking the two secondary windings together.

galih · 7th December 2009, 06:04 PM

andrew, I can understand that, but what's in my mind is how can I make 24-ct-24 with two separated transformer if the transformer is 5A ct? the secondary voltage is 12-ct-12 each transformer. thanx.

richie00boy · 7th December 2009, 06:08 PM

Connect the two transformers together in series. The join between them becomes your centre tap ground.

2nd December 2009, 06:11 PM	#1
galih diyAudio Member Join Date: Nov 2009 Location: yogyakarta	transformer with ct or non ct? hello guys...! I am newbie here and I would like to ask something about transformer. which is better, transformer with or without ct, and why? I will use that transformer to build power supply based on the schematic by carlos fm for my gainclone lm3886. the power supply will be non regulated one. please give me some advice! thanx before...

5th December 2009, 01:09 PM	#4
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	do you need a dual polarity DC supply for your circuit? __________________ regards Andrew T.

7th December 2009, 06:08 PM	#8
richie00boy Did it Himself diyAudio Member Join Date: Nov 2003 Location: Gloucestershire, England, UK	Connect the two transformers together in series. The join between them becomes your centre tap ground. __________________ www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Using mains transformer as output transformer	Elias	Tubes / Valves	175	3rd November 2009 09:36 PM
Modulation transformer for a driver transformer?	ironradio	Tubes / Valves	6	28th December 2008 06:05 PM
filament transformer vs plate transformer	contaxchen	Tubes / Valves	10	14th January 2005 11:43 AM
toroid Transformer as power Transformer for tube	tone	Tubes / Valves	7	11th February 2003 09:57 AM
toroid Transformer as output Transformer for tube preamp?	tone	Tubes / Valves	15	2nd February 2003 05:36 AM


	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

2nd December 2009, 09:18 PM	#2
Juergen Knoop diyAudio Member Join Date: Jan 2007 Blog Entries: 3	whatever the transformer is centertapped or has dual secondaries doesn't matter. Please avoid transformers that have only secondary winding and no centertap. Regards

4th December 2009, 06:26 PM	#3
galih diyAudio Member Join Date: Nov 2009 Location: yogyakarta	can I use centertapped transformer to act as a non centertapped one? how can I get 0-24V with centertapped transformer that has 24-ct-24? is the transformer that has dual secondaries(0-24, 0-24) same as two non centertapped one(0-24), note :both has same VA ratings?

5th December 2009, 05:11 PM	#5
galih diyAudio Member Join Date: Nov 2009 Location: yogyakarta	yes, I do need dual polarity dc supply with two transformer, but I can not decide whether centertapped transformer or not I should use? it is hard to find transformer with dual secondary in indonesia.

7th December 2009, 06:04 PM	#7
galih diyAudio Member Join Date: Nov 2009 Location: yogyakarta	andrew, I can understand that, but what's in my mind is how can I make 24-ct-24 with two separated transformer if the transformer is 5A ct? the secondary voltage is 12-ct-12 each transformer. thanx.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read