se9060

adason · 11th February 2009, 06:27 PM

hi amp experts,

I have old technics se9060 amp, which needs power transistor replacements.
I got the schematics from ma_coule, thanks Janko.
Original transistors are 2SD675 and 2SB655. I suppose these are obsolete. Can anyone suggest replacements? Even better, can anyone offer two pairs (I would like to replace both channels) replacement transistors for sale? I will gladly pay premium if they are not fake.

thanks,
ed

Steve Dunlap · 11th February 2009, 08:20 PM

Those transistors were 160V 12A 100W devices. You could replace them with MJ15024/25s. That would be an upgrade and fairly inexpensive.

adason · 11th February 2009, 10:09 PM

Hi Steve,

great, I am going to order those from Digi-Key,

Ed

adason · 27th February 2009, 12:20 AM

Hi Steve,

transistors arrived and were easily replaced. No soldering, just two screws, slide new in and that's it. Works great. Thanks Steve for the transistor replacement suggestion. I readjusted DC points as per schematics thanks to Janko Kolar. Thanks Janko.

I like this amplifier. It has decent sound, smooth, sweet and delicate. Massively built, nice overkill power supply, actually two independent ones.

The only think I hate about this amp is its output connectors. I will have to replace them. They only accept bare wire. Weird.

Anyway, its playing now. Sweet, sweet success!

bobodioulasso · 23rd October 2009, 11:25 AM

Hi Adason.
I just bought on the bay an old se9060. I would be very pleased if you could email me its schematic.
I find this amp better for bass than treebles. What do you think?

adason · 12:31 PM

hi bobodioulasso,

yes, I can email you the schematics, I have it, once I get home...
soundwise, yes, it sounds little laid back, relaxed comparing to other amps, I like its sound, its sweet, never too bright
I use it to power the woofers in biamplified system, its great for that

ed

adason · 23rd October 2009, 02:44 PM

what is your email bobodioulasso?
ed

bobodioulasso · 23rd October 2009, 03:17 PM

I received your schematic.
Thanks a lot.

adason · 23rd October 2009, 07:39 PM

you are welcome

11th February 2009, 06:27 PM	#1
adason diyAudio Member Join Date: Nov 2004 Location: home sweet home	se9060 hi amp experts, I have old technics se9060 amp, which needs power transistor replacements. I got the schematics from ma_coule, thanks Janko. Original transistors are 2SD675 and 2SB655. I suppose these are obsolete. Can anyone suggest replacements? Even better, can anyone offer two pairs (I would like to replace both channels) replacement transistors for sale? I will gladly pay premium if they are not fake. thanks, ed

23rd October 2009, 12:27 PM	#6
adason diyAudio Member Join Date: Nov 2004 Location: home sweet home	hi bobodioulasso, yes, I can email you the schematics, I have it, once I get home... soundwise, yes, it sounds little laid back, relaxed comparing to other amps, I like its sound, its sweet, never too bright I use it to power the woofers in biamplified system, its great for that ed Last edited by adason; 23rd October 2009 at 12:31 PM.

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11th February 2009, 08:20 PM	#2
Steve Dunlap diyAudio Member Join Date: Sep 2008 Location: Here	Those transistors were 160V 12A 100W devices. You could replace them with MJ15024/25s. That would be an upgrade and fairly inexpensive.

11th February 2009, 10:09 PM	#3
adason diyAudio Member Join Date: Nov 2004 Location: home sweet home	Hi Steve, great, I am going to order those from Digi-Key, Ed

27th February 2009, 12:20 AM	#4
adason diyAudio Member Join Date: Nov 2004 Location: home sweet home	Hi Steve, transistors arrived and were easily replaced. No soldering, just two screws, slide new in and that's it. Works great. Thanks Steve for the transistor replacement suggestion. I readjusted DC points as per schematics thanks to Janko Kolar. Thanks Janko. I like this amplifier. It has decent sound, smooth, sweet and delicate. Massively built, nice overkill power supply, actually two independent ones. The only think I hate about this amp is its output connectors. I will have to replace them. They only accept bare wire. Weird. Anyway, its playing now. Sweet, sweet success!

23rd October 2009, 11:25 AM	#5
bobodioulasso diyAudio Member Join Date: May 2008	Hi Adason. I just bought on the bay an old se9060. I would be very pleased if you could email me its schematic. I find this amp better for bass than treebles. What do you think?

23rd October 2009, 02:44 PM	#7
adason diyAudio Member Join Date: Nov 2004 Location: home sweet home	what is your email bobodioulasso? ed

23rd October 2009, 03:17 PM	#8
bobodioulasso diyAudio Member Join Date: May 2008	I received your schematic. Thanks a lot.

23rd October 2009, 07:39 PM	#9
adason diyAudio Member Join Date: Nov 2004 Location: home sweet home	you are welcome

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