Transistor needed

bob91343 · 20th January 2011, 09:17 PM

I need a 2SB618A to repair a Harman Kardon receiver. It is PNP power with a 7A and 150V rating.

Can anyone help find one of these, or a reasonable substitute? The receiver isn't worth spending much so anything cheap is good.

colwaiting · 21st January 2011, 07:13 PM

2SB 556 ( this is a to3, of course) From a monacor amp that Didn't die!
Should be super compatible
I am ready to give up on all my tosh To3 (eight) (I test them with a little tool that goes beep, and is soo quiet if they are dead)
Are you quite sure the NPN complement is really OK?
I can come up with approprate drivers ( even Tosh) which would be a very good idea,
and possibly a pair of emitter resistors if you tell me the value.
The only thing representing notable $$ is the PNP, and even that will be cheap
Doug

bob91343 · 21st January 2011, 10:02 PM

Thanks Doug! I have all the parts I need except the PNP. They are available but too pricey for me. This is for a receiver someone asked me to fix and then waffled. If I can fix it I might be able to sell it for what I already have in it. Otherwise it's in my way and I may end up scrapping it.

colwaiting · 23rd January 2011, 05:55 PM

Ok, but the shipping is ?? Do you have an idea, thru post office?
I can use a CD mailer and hope they don't squish it.
My price is $11 You can get another if this cooks, for some reason
(I expect you to use a variac and bring up the power slowly, checking for symmetrical voltages, current draw)
Turns out this is the pioneer one, the other pair is 427 from the monacor, I can't imagine there is much difference.

XEAGLEKEEPER · 23rd January 2011, 10:23 PM

Quote:

Originally Posted by bob91343

I need a 2SB618A to repair a Harman Kardon receiver. It is PNP power with a 7A and 150V rating.

Can anyone help find one of these, or a reasonable substitute? The receiver isn't worth spending much so anything cheap is good.

How about $4 plus shipping.
MJ15022G ON Semiconductor Bipolar Power

bob91343 · 24th January 2011, 07:12 PM

Yeah but that's NPN and I need PNP.

XEAGLEKEEPER · 24th January 2011, 10:17 PM

Quote:

Originally Posted by bob91343

Yeah but that's NPN and I need PNP.

Opps skipped a line
MJ15023G ON Semiconductor Bipolar Power

bob91343 · 24th January 2011, 10:45 PM

Okay thanks. The only hesitation I have is that I am not sure it's a good sub (and will probably require chassis surgery to mount) and when I add shipping it will raise the price. I'll talk to Mouser and find out the cheapest shipping.

Thanks you for the lead[ I appreciate it. I did find the right part but the place has $100 minimum. So many suppliers do that, effectively saying they don't want to bother with the little guys.

bob91343 · 24th January 2011, 11:22 PM

No the transistor I am replacing is NOT a TO-3. It's a strange, rare package with bat wings and that's part of the problem.

XEAGLEKEEPER · 24th January 2011, 11:26 PM

Quote:

Originally Posted by bob91343

No the transistor I am replacing is NOT a TO-3. It's a strange, rare package with bat wings and that's part of the problem.

Ohh..Bat wings--Good luck!! They have long been out of production.MarkTheFIXER designed and fabricated PCB's to adapt the batwings to TO-3PL's to substitute for the Pioneer SX-1280's

20th January 2011, 09:17 PM	#1
bob91343 diyAudio Member Join Date: Mar 2010	Transistor needed I need a 2SB618A to repair a Harman Kardon receiver. It is PNP power with a 7A and 150V rating. Can anyone help find one of these, or a reasonable substitute? The receiver isn't worth spending much so anything cheap is good.

23rd January 2011, 05:55 PM	#4
colwaiting diyAudio Member Join Date: Dec 2002 Location: boston Ma.	smeiconductor Ok, but the shipping is ?? Do you have an idea, thru post office? I can use a CD mailer and hope they don't squish it. My price is $11 You can get another if this cooks, for some reason (I expect you to use a variac and bring up the power slowly, checking for symmetrical voltages, current draw) Turns out this is the pioneer one, the other pair is 427 from the monacor, I can't imagine there is much difference.

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
Transistor replacements needed	gekkehenk	Solid State	16	30th April 2010 06:11 AM
transistor substitution help needed! Thanks	crippledchicken	Parts	18	4th July 2008 12:08 PM
Transistor sub help needed	Geek	Parts	25	8th December 2007 04:14 PM
ZTX653 transistor or sub needed	thereminhead85	Parts	4	26th April 2006 06:01 PM
Transistor specialist needed	portlandlay	Pass Labs	18	28th November 2005 10:51 PM

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

21st January 2011, 07:13 PM	#2
colwaiting diyAudio Member Join Date: Dec 2002 Location: boston Ma.	2SB 556 ( this is a to3, of course) From a monacor amp that Didn't die! Should be super compatible I am ready to give up on all my tosh To3 (eight) (I test them with a little tool that goes beep, and is soo quiet if they are dead) Are you quite sure the NPN complement is really OK? I can come up with approprate drivers ( even Tosh) which would be a very good idea, and possibly a pair of emitter resistors if you tell me the value. The only thing representing notable $$ is the PNP, and even that will be cheap Doug

21st January 2011, 10:02 PM	#3
bob91343 diyAudio Member Join Date: Mar 2010	Thanks Doug! I have all the parts I need except the PNP. They are available but too pricey for me. This is for a receiver someone asked me to fix and then waffled. If I can fix it I might be able to sell it for what I already have in it. Otherwise it's in my way and I may end up scrapping it.

24th January 2011, 07:12 PM	#6
bob91343 diyAudio Member Join Date: Mar 2010	Yeah but that's NPN and I need PNP.

24th January 2011, 10:45 PM	#8
bob91343 diyAudio Member Join Date: Mar 2010	Okay thanks. The only hesitation I have is that I am not sure it's a good sub (and will probably require chassis surgery to mount) and when I add shipping it will raise the price. I'll talk to Mouser and find out the cheapest shipping. Thanks you for the lead[ I appreciate it. I did find the right part but the place has $100 minimum. So many suppliers do that, effectively saying they don't want to bother with the little guys.

24th January 2011, 11:22 PM	#9
bob91343 diyAudio Member Join Date: Mar 2010	No the transistor I am replacing is NOT a TO-3. It's a strange, rare package with bat wings and that's part of the problem.

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