Student

tommy1 · 17th January 2010, 08:41 PM

Hello everybody,
I am looking for the schematic diagram for these transistors 2SC5200/2SA1943, and they go with C2705/A1145...2sd669/2sb649.

Thank you so much!

juma · 17th January 2010, 09:58 PM

I suppose you want power amplifier schematic ?
Do you happen to know what kind of amplifier you are after - what power rating, what kind of speakers you intend to drive, how much gain you need, do you want class A or something else, PA or home use, ... ?

You can't expect a qualified answer without asking a right question (browse a little through the forum, use the search button, you might find something you like)

tommy1 · 17th January 2010, 10:05 PM

I have the Amplifier/mixer/karaokee API A-501. I cannot find the values of some resistors because they are all black color.
Thank you again

wahab · 17th January 2010, 10:32 PM

Quote:

Originally Posted by tommy1

Hello everybody,
I am looking for the schematic diagram for these transistors 2SC5200/2SA1943, and they go with C2705/A1145...2sd669/2sb649.

Thank you so much!

beware that C2705/A1145 don t work as drivers, only as vas..
correct drivers for the 2SC5200/2SA1943 are 2SC4793/2SA1837....

tommy1 · 17th January 2010, 10:36 PM

...right now I don't see any 2sc4739/2sa1837 in my amplifier???
All I see is C2705/a1145.

juma · 17th January 2010, 10:47 PM

Quote:

Originally Posted by tommy1

I have the Amplifier/mixer/karaokee API A-501. I cannot find the values of some resistors because they are all black color.
Thank you again

Actually, you want to say that you need schematic of Amplifier/mixer/karaokee API A-501, right ?

tommy1 · 17th January 2010, 10:48 PM

Yes, Juma.
Thank you!

17th January 2010, 08:41 PM	#1
tommy1 diyAudio Member Join Date: Jan 2010	Student Hello everybody, I am looking for the schematic diagram for these transistors 2SC5200/2SA1943, and they go with C2705/A1145...2sd669/2sb649. Thank you so much!

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17th January 2010, 09:58 PM	#2
juma diyAudio Member Join Date: Nov 2005 Location: Zemun	I suppose you want power amplifier schematic ? Do you happen to know what kind of amplifier you are after - what power rating, what kind of speakers you intend to drive, how much gain you need, do you want class A or something else, PA or home use, ... ? You can't expect a qualified answer without asking a right question (browse a little through the forum, use the search button, you might find something you like)

17th January 2010, 10:05 PM	#3
tommy1 diyAudio Member Join Date: Jan 2010	I have the Amplifier/mixer/karaokee API A-501. I cannot find the values of some resistors because they are all black color. Thank you again

17th January 2010, 10:36 PM	#5
tommy1 diyAudio Member Join Date: Jan 2010	...right now I don't see any 2sc4739/2sa1837 in my amplifier??? All I see is C2705/a1145.

17th January 2010, 10:48 PM	#7
tommy1 diyAudio Member Join Date: Jan 2010	Yes, Juma. Thank you!

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