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Old 18th August 2005, 05:05 PM   #1
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Default 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?
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Old 18th August 2005, 07:39 PM   #2
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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
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Old 18th August 2005, 08:04 PM   #3
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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, -/2,8ĶS
2SC2591: NF/S-L, 150/150V, 1A, 20W, 200MHz

Are you sure about the 2SA1101? Canít find anything about it.

/Hugo
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Old 19th August 2005, 04:31 AM   #4
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Thanks guys!

*doublechecks*

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


Humm,the spec's look fairly close atleast..
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Old 19th August 2005, 12:11 PM   #5
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2SA1106: NF/S-L, 140V, 10A, 100W, 20MHz

/Hugo
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Old 20th August 2005, 09:29 AM   #6
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Cool,thanks Hugo!
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Old 30th September 2005, 04:25 AM   #7
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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
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