Change medium transistors...

Dj BASS AMP · 18th February 2003, 06:30 PM

Can I Change medium transistors in my amp
from 2SC2073/A940 to TIP102/107... ??
and what is do if i change them???

if is matter so... my amp work on 70V+/- the output transistor is 2sc5200/A1943...

Information about 2SC2073/A940 ~ TIP102/107

Netlist · 18th February 2003, 06:40 PM

Hi, Dj BASS AMP

I think you can't change the 2SC2073/A940 to TIP102/107
because the TIP's are Darlingtons.
Some substitutes could be those:

2SC2073: BD239D, 2SC1669, 2SD608(A), 2SD1138
2SA940 : 2SA839, 2SB608, 2SB628(A), 2SB861

But why would you change them, are they broken?

/Hugo - doesn’t know why one should change transistors if the old ones are OK

Dj BASS AMP · 18th February 2003, 06:57 PM

if i change to transistor stronger what it will do to the amp???

Netlist · 18th February 2003, 08:28 PM

What do you mean by stronger? More current, more voltage?

Nothing will happen; it only means that the transistors are able to resist more voltage and more current. But as long as you don't give them more voltage or current, nothing will happen.

To make the amp more powerful, you probably have to redesign
a lot of things.

/Hugo

Dj BASS AMP · 18th February 2003, 08:36 PM

ok thanks man !

Dj BASS AMP · 20th February 2003, 02:02 PM

can i change from 2SC2073/A940 to MJE15030/1 or TIP41/2C ??

Dj BASS AMP · 20th February 2003, 04:01 PM

can i change from 2SC2073/A940 to MJE15030/1 or TIP41/2C ??

Christer · 20th February 2003, 04:14 PM

I think Hugo has pretty much answered your question already.

Why do you want to change the transistors? If you are hoping
to get more power out of the amplifier you most likely have
to replace most of the expensive components, like transformer,
filter capacitors, output transistors, heatsinks etc. This would
mean a complete redesign, so it would be better to start from
scratch and build a new amplifier.

Anyway, if you still want to change the transistors for some
reason, you will at least have to provide a schematic or tell
what amplifier it is. Now we don't even know if you are talking
about the OPS drivers or the VAS transistors or whatever. I
think nobody can give a good answer without more information.

And once again, first make clear to yourself why you want to
change the transistors.

Dj BASS AMP · 20th February 2003, 04:25 PM

i only want to now if i can to change from 2SC2073/A940 to MJE15030/1 or TIP41/2C without ask for more power...

i only want to now if i can to change them and the amp still work... OK?

janneman · 20th February 2003, 04:38 PM

Quote:

Originally posted by Dj BASS AMP
i only want to now if i can to change from 2SC2073/A940 to MJE15030/1 or TIP41/2C without ask for more power...

i only want to now if i can to change them and the amp still work... OK?

Writing in bold is not going to change what Christer said. Different transistor types are, well, different in some respects. Without knowing where/how they are used, it is impossible to say whether these differences make a difference in your amp. You may be OK replacing them, but they may also make your amp smoke.

Jan Didden

18th February 2003, 06:30 PM	#1
Dj BASS AMP Account Disabled Join Date: Jul 2002	Change medium transistors... Can I Change medium transistors in my amp from 2SC2073/A940 to TIP102/107... ?? and what is do if i change them??? if is matter so... my amp work on 70V+/- the output transistor is 2sc5200/A1943... Information about 2SC2073/A940 ~ TIP102/107

20th February 2003, 04:14 PM	#8
Christer diyAudio Member Join Date: Sep 2002 Location: Sweden	I think Hugo has pretty much answered your question already. Why do you want to change the transistors? If you are hoping to get more power out of the amplifier you most likely have to replace most of the expensive components, like transformer, filter capacitors, output transistors, heatsinks etc. This would mean a complete redesign, so it would be better to start from scratch and build a new amplifier. Anyway, if you still want to change the transistors for some reason, you will at least have to provide a schematic or tell what amplifier it is. Now we don't even know if you are talking about the OPS drivers or the VAS transistors or whatever. I think nobody can give a good answer without more information. And once again, first make clear to yourself why you want to change the transistors. __________________ "Jitter clock: - - indicates product does NOT have this feature" From product spec. of a CD player

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Looking to Purchase ZTX653 & ZTX753 Medium Power Transistors	dtm1962	Swap Meet	0	11th April 2008 08:29 AM
Large Cone/large VC or several medium sized cones / medium VCs	vajolet	Multi-Way	14	3rd December 2007 07:10 PM
change busted output transistors	Tarzan	Solid State	0	8th June 2004 09:34 AM
Medium-fi amplifier biasing	Circlotron	Solid State	1	24th July 2002 03:44 AM

New To Site?	Need Help?
Register to Participate Search Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


<a rel='nofollow' href='http://www.diyaudio.com/openx/www/delivery/ck.php?n=aa5cb2e9&cb=227754' target='_blank'><img src='http://www.diyaudio.com/openx/www/delivery/avw.php?zoneid=3&cb=227754&n=aa5cb2e9' border='0' alt='' /></a>	We're saving for a new server - help us to serve you by Donating Today and become a friend with benefits! Ads on/off / Custom Title / 2009 Tshirt / More PMs / Bigger Images / Advanced printing

18th February 2003, 06:40 PM	#2
Netlist diyAudio Moderator Join Date: Jan 2003 Location: Belgium	Hi, Dj BASS AMP I think you can't change the 2SC2073/A940 to TIP102/107 because the TIP's are Darlingtons. Some substitutes could be those: 2SC2073: BD239D, 2SC1669, 2SD608(A), 2SD1138 2SA940 : 2SA839, 2SB608, 2SB628(A), 2SB861 But why would you change them, are they broken? /Hugo - doesn’t know why one should change transistors if the old ones are OK

18th February 2003, 06:57 PM	#3
Dj BASS AMP Account Disabled Join Date: Jul 2002	if i change to transistor stronger what it will do to the amp???

18th February 2003, 08:28 PM	#4
Netlist diyAudio Moderator Join Date: Jan 2003 Location: Belgium	What do you mean by stronger? More current, more voltage? Nothing will happen; it only means that the transistors are able to resist more voltage and more current. But as long as you don't give them more voltage or current, nothing will happen. To make the amp more powerful, you probably have to redesign a lot of things. /Hugo

18th February 2003, 08:36 PM	#5
Dj BASS AMP Account Disabled Join Date: Jul 2002	ok thanks man !

20th February 2003, 02:02 PM	#6
Dj BASS AMP Account Disabled Join Date: Jul 2002	can i change from 2SC2073/A940 to MJE15030/1 or TIP41/2C ??

20th February 2003, 04:01 PM	#7
Dj BASS AMP Account Disabled Join Date: Jul 2002	can i change from 2SC2073/A940 to MJE15030/1 or TIP41/2C ??

20th February 2003, 04:25 PM	#9
Dj BASS AMP Account Disabled Join Date: Jul 2002	i only want to now if i can to change from 2SC2073/A940 to MJE15030/1 or TIP41/2C without ask for more power... i only want to now if i can to change them and the amp still work... OK?

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