Require correct substitute for B512

analogadikt · 7th July 2011, 04:17 PM

Hallo Everybody,

I am trying to repair my Superscope quad amp. Two of the output transistors need to be replaced. These are B512 type. I have not been able to find these with the local suppliers here and shall be glad if somebody can advise on suitable substitutes.

Regards

Tekko · 7th July 2011, 04:21 PM

Is is 2SB512 ? View 2SB512_4457715.PDF datasheet online --- IC-ON-LINE
http://cgi.ebay.com/new-rare-2SB512-...2#ht_500wt_922

jaycee · 7th July 2011, 07:12 PM

If they are TO-220 packaged 2SB512, then there's a whole lot of modern devices that would work - TIP41C would probably be adequate.

analogadikt · 10th July 2011, 11:21 AM

Thanks for the info.

They are TO-220 packaged devices. The amp is a SuperScope QA450. I found that the Marantz 2215B receiver has a very similar circuit and PCB layout with some variations. Anybody here has a copy of the service manual for the QA450?

Regards,

sregor · 10th July 2011, 02:23 PM

Quote:

Originally Posted by jaycee

If they are TO-220 packaged 2SB512, then there's a whole lot of modern devices that would work - TIP41C would probably be adequate.

Should be TIP42C - 2sb512 is PNP. And they would work fine.

7th July 2011, 04:17 PM	#1
analogadikt diyAudio Member Join Date: Jan 2011 Location: Mumbai, India	Require correct substitute for B512 Hallo Everybody, I am trying to repair my Superscope quad amp. Two of the output transistors need to be replaced. These are B512 type. I have not been able to find these with the local suppliers here and shall be glad if somebody can advise on suitable substitutes. Regards

7th July 2011, 04:21 PM	#2
Tekko diyAudio Member Join Date: Jan 2005	Is is 2SB512 ? View 2SB512_4457715.PDF datasheet online --- IC-ON-LINE http://cgi.ebay.com/new-rare-2SB512-...2#ht_500wt_922 __________________ The point of life is to build atleast one audio amplifier before you die.

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
RS232 - Does it require a termination?	poynton	Everything Else	5	21st March 2011 06:52 AM
I require a DAC	HimeshP	Digital Line Level	6	30th December 2010 11:54 AM
Do I really require this box volume?	rhythmdiy	Multi-Way	6	4th November 2008 04:25 AM
Would this require degaussing?	ewan	Everything Else	4	5th December 2003 10:59 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

7th July 2011, 07:12 PM	#3
jaycee diyAudio Member Join Date: Apr 2004 Location: Norwich, UK	If they are TO-220 packaged 2SB512, then there's a whole lot of modern devices that would work - TIP41C would probably be adequate.

10th July 2011, 11:21 AM	#4
analogadikt diyAudio Member Join Date: Jan 2011 Location: Mumbai, India	Thanks for the info. They are TO-220 packaged devices. The amp is a SuperScope QA450. I found that the Marantz 2215B receiver has a very similar circuit and PCB layout with some variations. Anybody here has a copy of the service manual for the QA450? Regards,

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