Multiple secondaries toroid

steveline · 29th August 2007, 02:47 PM

Newbie here- about to buy GC kit... (have COMBED this board for info)

I have a 300Va toroid from an old outboard Velodyne power amp.

There are 4 pairs of leads + the sleeved primaries.
-2x20V and 2x24V

My question is: how do I connect these to a kit PS?

Should I leave any unused, etc.

Thanks!

P.S. I'll be bi-amping with the GC, a pair of current hungry ATC 4ohm.

AndrewT · 29th August 2007, 04:51 PM

Hi,
are the secondary wires identical?
It will give a clue on the VA of each winding.

steveline · 29th August 2007, 05:09 PM

Here's what I was told by Toroid Inc. (maker):

Orange/Red= 23.7V

Red/Grey= 20.4V

Gray/Orange= 20.4V

Orange/Yellow= 23.7V

"309 Va, grays are center tap/become ground"

Thanks Andrew!

AndrewT · 29th August 2007, 05:27 PM

Hi,
that's only the voltage info.
You need VA and/or current to determine the correct wiring up.
are the 20V & 23V separate windings or tappings off the same winding?

steveline · 29th August 2007, 05:33 PM

I was told 3.5a by the manufacturer

Thnks!

steveline · 29th August 2007, 05:35 PM

Quote:

are the 20V & 23V separate windings or tappings off the same winding?

They are all separate windings. As the man. told me.

AndrewT · 29th August 2007, 05:37 PM

please confirm if this is correct:
four separate windings all rated at 3.5A, using the same wire for each.

steveline · 29th August 2007, 05:56 PM

Quote:

four separate windings all rated at 3.5A, using the same wire for each.

Yes, 4 separate windings (8 individual leads)

AndrewT · 29th August 2007, 06:09 PM

the 20Vac will give about +-29Vdc
24Vac about +-35Vdc.
The higher voltage will suit the less sensitive driver.

Running separate windings requires dual rectifiers on each amplifier supply if you want to arrange a star audio ground for each.

steveline · 29th August 2007, 06:16 PM

Thanks again (newbie overflow of gratitude).

I was planning on running the standard chipamp stereo kit.

With this setup can I just use the 2x24Vac windings and insulate off the other 2?

29th August 2007, 02:47 PM	#1
steveline diyAudio Member Join Date: Aug 2007	Multiple secondaries toroid Newbie here- about to buy GC kit... (have COMBED this board for info) I have a 300Va toroid from an old outboard Velodyne power amp. There are 4 pairs of leads + the sleeved primaries. -2x20V and 2x24V My question is: how do I connect these to a kit PS? Should I leave any unused, etc. Thanks! P.S. I'll be bi-amping with the GC, a pair of current hungry ATC 4ohm. __________________ SL

29th August 2007, 04:51 PM	#2
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	Hi, are the secondary wires identical? It will give a clue on the VA of each winding. __________________ regards Andrew T.

29th August 2007, 05:09 PM	#3
steveline diyAudio Member Join Date: Aug 2007	Exact lead info Here's what I was told by Toroid Inc. (maker): Orange/Red= 23.7V Red/Grey= 20.4V Gray/Orange= 20.4V Orange/Yellow= 23.7V "309 Va, grays are center tap/become ground" Thanks Andrew! __________________ SL

29th August 2007, 05:27 PM	#4
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	Hi, that's only the voltage info. You need VA and/or current to determine the correct wiring up. are the 20V & 23V separate windings or tappings off the same winding? __________________ regards Andrew T.

29th August 2007, 05:33 PM	#5
steveline diyAudio Member Join Date: Aug 2007	I was told 3.5a by the manufacturer Thnks! __________________ SL


	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

29th August 2007, 05:37 PM	#7
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	please confirm if this is correct: four separate windings all rated at 3.5A, using the same wire for each. __________________ regards Andrew T.

29th August 2007, 06:09 PM	#9
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	the 20Vac will give about +-29Vdc 24Vac about +-35Vdc. The higher voltage will suit the less sensitive driver. Running separate windings requires dual rectifiers on each amplifier supply if you want to arrange a star audio ground for each. __________________ regards Andrew T.

29th August 2007, 06:16 PM	#10
steveline diyAudio Member Join Date: Aug 2007	Thanks again (newbie overflow of gratitude). I was planning on running the standard chipamp stereo kit. With this setup can I just use the 2x24Vac windings and insulate off the other 2? __________________ SL

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

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
Rectifying multiple secondaries..	DigitalJunkie	Power Supplies	6	15th February 2009 03:26 AM
winding multiple secondaries on a toroid???	Puggie	Power Supplies	3	9th August 2006 05:58 PM
Multiple secondaries hook-up!!!	Klimon	Tubes / Valves	4	10th July 2006 02:32 PM
multiple secondaries on a toroid	awashi	Power Supplies	12	10th July 2005 06:26 AM

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