Transistor subs..

DigitalJunkie · 18th August 2005, 04:05 PM

Hey Guys,

Iv'e got an amplifier PCB here,from a long forgotten amp/reciever. It's missing it's NPN drivers,and output transistors,but still works,IIRC. (pulled the NPN's out for use in another project.)
Somewhere around 100W per ch. I think.
I'm wondering if I can replace all the drivers and outputs with different types,which I have on hand,inorder to get it working again.

Original transistors are:

PNP's
2SA1301 (output)
2SA1011 (driver)

The mating,but missing NPN's,are,I assume:
2SC3280 (output)
2SC2344 (driver)

Can I replace them with these? :
PNP's
2SA1101 (output)
2SA1111 (driver)

NPN's
2SC2581 (output)
2SC2591 (driver)

Would that work?

Jan Dupont · 18th August 2005, 06:39 PM

I don't recall the specs for those types, however if the specs are the same or higher (Vce, Ic etc.) for the new replacement trannies there should be no problem

Remember to check the pin-configuration before installing

Netlist · 18th August 2005, 07:04 PM

Here are the specs:
2SA1301: HiFi-NF-E, 160V, 12A, 120W, 30MHz
2SA1011: NF/S-L, 180V, 1,5A, 25W, 100MHz
2SC3280: HiFi-NF-E, 160/160V, 12A, 120W, 30MHz
2SC2344: NF/S-L, 180/160V, 1,5A, 25W, 100MHz

2SA1101: ?
2SA1111: NF/S-L, 150V, 1A, 20W, 200MHz;
2SC2581: NF/S-L, 200/140V, 10A, 100W, -/2,8µS
2SC2591: NF/S-L, 150/150V, 1A, 20W, 200MHz

Are you sure about the 2SA1101? Can’t find anything about it.

/Hugo

DigitalJunkie · 19th August 2005, 03:31 AM

Thanks guys!

*doublechecks*

2SA1106 Sorry,too many transistor #'s to keep straight.

Humm,the spec's look fairly close atleast..

Netlist · 19th August 2005, 11:11 AM

2SA1106: NF/S-L, 140V, 10A, 100W, 20MHz

/Hugo

DigitalJunkie · 20th August 2005, 08:29 AM

Cool,thanks Hugo!

DigitalJunkie · 30th September 2005, 03:25 AM

It worked nicely!

The amp actually sounds pretty good too! (after a little tweaking)
I'm listening to it right now

There's some rambling about it here:
http://geek.scorpiorising.ca/GeeK_Zo...p?topic=1618.0

18th August 2005, 04:05 PM	#1
DigitalJunkie diyAudio Member Join Date: Apr 2003 Location: Portland,Oregon Blog Entries: 4	Transistor subs.. Hey Guys, Iv'e got an amplifier PCB here,from a long forgotten amp/reciever. It's missing it's NPN drivers,and output transistors,but still works,IIRC. (pulled the NPN's out for use in another project.) Somewhere around 100W per ch. I think. I'm wondering if I can replace all the drivers and outputs with different types,which I have on hand,inorder to get it working again. Original transistors are: PNP's 2SA1301 (output) 2SA1011 (driver) The mating,but missing NPN's,are,I assume: 2SC3280 (output) 2SC2344 (driver) Can I replace them with these? : PNP's 2SA1101 (output) 2SA1111 (driver) NPN's 2SC2581 (output) 2SC2591 (driver) Would that work?

18th August 2005, 06:39 PM	#2
Jan Dupont diyAudio Member Join Date: Apr 2003 Location: Copenhagen, Denmark	I don't recall the specs for those types, however if the specs are the same or higher (Vce, Ic etc.) for the new replacement trannies there should be no problem Remember to check the pin-configuration before installing __________________ Free Schematic and Service Manual downloads www.audio-circuit.dk, Company: www.dupont-audio.com, Joint venture: www.DupontMantra.com

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 subs. 2sc960 & 2sa607 Help please	The Donk!	Solid State	4	28th February 2008 03:18 AM
Can bias transistor mount on top(body) of output transistor??	Leolabs	Solid State	23	16th February 2008 12:35 AM
Convert floor standers to subs with Tang Band 8" subs?	prerunnerv6	Subwoofers	3	26th February 2006 12:44 AM
2 subs one box/2 subs 2 boxes	vetkilr	Subwoofers	5	22nd February 2006 09:27 PM
T/S for old subs	Doug	Subwoofers	2	1st November 2003 02:06 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

18th August 2005, 07:04 PM	#3
Netlist diyAudio Moderator Join Date: Jan 2003	Here are the specs: 2SA1301: HiFi-NF-E, 160V, 12A, 120W, 30MHz 2SA1011: NF/S-L, 180V, 1,5A, 25W, 100MHz 2SC3280: HiFi-NF-E, 160/160V, 12A, 120W, 30MHz 2SC2344: NF/S-L, 180/160V, 1,5A, 25W, 100MHz 2SA1101: ? 2SA1111: NF/S-L, 150V, 1A, 20W, 200MHz; 2SC2581: NF/S-L, 200/140V, 10A, 100W, -/2,8µS 2SC2591: NF/S-L, 150/150V, 1A, 20W, 200MHz Are you sure about the 2SA1101? Can’t find anything about it. /Hugo

19th August 2005, 03:31 AM	#4
DigitalJunkie diyAudio Member Join Date: Apr 2003 Location: Portland,Oregon Blog Entries: 4	Thanks guys! doublechecks 2SA1106 Sorry,too many transistor #'s to keep straight. Humm,the spec's look fairly close atleast..

19th August 2005, 11:11 AM	#5
Netlist diyAudio Moderator Join Date: Jan 2003	2SA1106: NF/S-L, 140V, 10A, 100W, 20MHz /Hugo

20th August 2005, 08:29 AM	#6
DigitalJunkie diyAudio Member Join Date: Apr 2003 Location: Portland,Oregon Blog Entries: 4	Cool,thanks Hugo!

30th September 2005, 03:25 AM	#7
DigitalJunkie diyAudio Member Join Date: Apr 2003 Location: Portland,Oregon Blog Entries: 4	It worked nicely! The amp actually sounds pretty good too! (after a little tweaking) I'm listening to it right now There's some rambling about it here: http://geek.scorpiorising.ca/GeeK_Zo...p?topic=1618.0

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