Help: inductances in original Quad405. - Page 2

sreten · 2nd December 2008, 07:04 PM

http://stores.ebay.co.uk/DadaElectro...QQftidZ2QQtZkm

These "high quality" replacement parts certainly appear to be cored.
Perhaps the core is less permeable than typical speaker inductors ?

Seems I've read some misinformation regarding the 405 somewhere.

/sreten.

La Mer · 5th December 2008, 01:29 AM

Thank you all. Because as a new member, my posted reply will be postpond for some while. But I'm keep on looking at the leads including this one started by my own.

Hi Ouroboros,

Could you help to look again if cores inside of those axial-lead inductors are looked like as magnetic material (like as black metal cylinder), or only a plastic cylinder?

Please be careful, don't take off the part nor break it. As much as having an idea, that's enough. If its core is only a plastic cylinder, then the inductors are still air ones, as which everyone likes mostly. But really it confused why it seems so small while it is a real plastic core

Ouroboros · 5th December 2008, 06:49 AM

I've still got the old PCBs taken out of one of my 405s, so I'll try with a magnet to see if the core is ferrite.

La Mer · 8th December 2008, 03:58 PM

Thank you, Ouroboros. I'm looking forward to your reulst.

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
QUASAR a QUAD405 reborn design	tvicol	Solid State	195	23rd November 2010 11:18 AM
Rebuilt Quad405 Problems	Thomo	Solid State	18	5th September 2007 10:37 AM
Power transformer inductances	Nixie	Parts	10	7th October 2006 01:34 PM
question about quad405.	ary	Solid State	8	25th July 2005 01:44 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


	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 2008, 07:04 PM	#11
sreten diyAudio Member Join Date: Nov 2003 Location: Brighton UK	http://stores.ebay.co.uk/DadaElectro...QQftidZ2QQtZkm These "high quality" replacement parts certainly appear to be cored. Perhaps the core is less permeable than typical speaker inductors ? Seems I've read some misinformation regarding the 405 somewhere. /sreten.

5th December 2008, 01:29 AM	#12
La Mer diyAudio Member Join Date: Apr 2008	Thank you all. Because as a new member, my posted reply will be postpond for some while. But I'm keep on looking at the leads including this one started by my own. Hi Ouroboros, Could you help to look again if cores inside of those axial-lead inductors are looked like as magnetic material (like as black metal cylinder), or only a plastic cylinder? Please be careful, don't take off the part nor break it. As much as having an idea, that's enough. If its core is only a plastic cylinder, then the inductors are still air ones, as which everyone likes mostly. But really it confused why it seems so small while it is a real plastic core

5th December 2008, 06:49 AM	#13
Ouroboros diyAudio Member Join Date: Dec 2003 Location: Nottingham UK	I've still got the old PCBs taken out of one of my 405s, so I'll try with a magnet to see if the core is ferrite.

8th December 2008, 03:58 PM	#14
La Mer diyAudio Member Join Date: Apr 2008	Thank you, Ouroboros. I'm looking forward to your reulst.