Replacement Transformer for Quad 405

errcl65 · 12th December 2011, 05:28 PM

When can I source in North America, an
affordable 115V / 300VA Toroid with 2 x 35VAC
what will fit in the original Quad 405 chassis?

I've got a unit here with a very noisy main.

Mooly · 12th December 2011, 06:17 PM

Quote:

Originally Posted by errcl65

When can I source in North America, an
affordable 115V / 300VA Toroid with 2 x 35VAC
what will fit in the original Quad 405 chassis?

I've got a unit here with a very noisy main.

Can't help you with local suppliers I'm afraid but have you considered it could (might) be a mains purity issue.

Mains DC and Transformers

moray james · 12th December 2011, 06:58 PM

not sure if you know but the Quad uses a C-core transformer. I would look for a used 405 for the parts. Best regards Moray James.

jez · 12th December 2011, 07:38 PM

There was a batch of noisy mains transformers that Quad had problems with during the 70's. It could be you have one of them...

errcl65 · 12th December 2011, 09:30 PM

When the unit is cold, it is quiet. After about 15 minutes, the transformer
will start to hum/buzz. It isn't from the AC as I have had it hooked up
to AC/DC - DC/AC isolation unit APC R1500 which give is a clean 60Hz.

This particular Q 405 looks to be of an early vintage.

On the net, there are some toroids from Multicomp, but they only
have 230 V primary side. No good for North America.

Mooly · 13th December 2011, 06:52 AM

Multicomp split primary,
MULTICOMP|MCTA300/35|300VA TOROIDAL 2X35V | CPC From This Range

Is it worth a dip in varnish for the old tranny. Heat the tranny up first (quite hot say around 60c) and then immerse in varnish for an hour or two, remove and leave to drip dry for 24 hours. Then place in a warm location.

Ian Finch · 13th December 2011, 08:02 AM

Quote:

Originally Posted by errcl65

When can I source in North America, an
affordable 115V / 300VA Toroid with 2 x 35VAC
what will fit in the original Quad 405 chassis?

I've got a unit here with a very noisy main.

Did you try these guys or other links from Hammond Mfg.?
Toroidal Transformer Sale, Toroidal Transformers on Sale!

sregor · 13th December 2011, 06:15 PM

antek Antek - Your reliable source of transformers, power supplies, and more.

12th December 2011, 05:28 PM	#1
errcl65 diyAudio Member Join Date: Dec 2011 Location: Ontario, Canada	Replacement Transformer for Quad 405 When can I source in North America, an affordable 115V / 300VA Toroid with 2 x 35VAC what will fit in the original Quad 405 chassis? I've got a unit here with a very noisy main.

12th December 2011, 06:58 PM	#3
moray james diyAudio Member Join Date: Aug 2003 Location: Calgary on the Bow	not sure if you know but the Quad uses a C-core transformer. I would look for a used 405 for the parts. Best regards Moray James. __________________ moray james

12th December 2011, 07:38 PM	#4
jez diyAudio Member Join Date: Jan 2004 Location: n.e england	There was a batch of noisy mains transformers that Quad had problems with during the 70's. It could be you have one of them... __________________ Repairs and mods to Real Hi-Fi, guitar amps and P.A. in North East England. http://www.arklesselectronics.com

13th December 2011, 06:52 AM	#6
Mooly diyAudio Member Join Date: Sep 2007	Multicomp split primary, MULTICOMP\|MCTA300/35\|300VA TOROIDAL 2X35V \| CPC From This Range Is it worth a dip in varnish for the old tranny. Heat the tranny up first (quite hot say around 60c) and then immerse in varnish for an hour or two, remove and leave to drip dry for 24 hours. Then place in a warm location. __________________ ------------------------------------------------------- *A simulation free zone.* *Design it, build it, test it.*

13th December 2011, 06:15 PM	#8
sregor diyAudio Member Join Date: Jan 2006 Location: massachusetts	antek Antek - Your reliable source of transformers, power supplies, and more. __________________ Steve


	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

12th December 2011, 09:30 PM	#5
errcl65 diyAudio Member Join Date: Dec 2011 Location: Ontario, Canada	When the unit is cold, it is quiet. After about 15 minutes, the transformer will start to hum/buzz. It isn't from the AC as I have had it hooked up to AC/DC - DC/AC isolation unit APC R1500 which give is a clean 60Hz. This particular Q 405 looks to be of an early vintage. On the net, there are some toroids from Multicomp, but they only have 230 V primary side. No good for North America.

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
Quad 405	Piersma	Swap Meet	8	25th October 2011 03:23 PM
quad 405-2	goodguys	Solid State	3	14th March 2011 09:35 AM
Quad 405 mains transformer?	Confussed	Solid State	2	14th August 2007 06:12 PM
pcb for quad 405	kanjumi	Solid State	6	3rd April 2006 05:03 PM
quad 405	hazenhoe	Solid State	2	27th December 2003 01:32 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