Looking for a good NPN audio driver for my power amp.

Progg70 · 23rd October 2005, 07:36 AM

I have used BD829 as audio driver. They don’t make them any longer. Anyone no what I can use instead?

I have the 2SC2922 for the output in my power amplifier. Can any one tell me what is very good audio transistor NPN who I can use as a driver before the 2SC2922?

Regard

Progg70

AndrewT · 23rd October 2005, 09:09 AM

Hi,
you could try
2sa649/c669 120V
2sa649a/c669a 160V
2sa1535/c3944 150V
2sa1535a/c3944a 180V
2sa1220/c2690 120V
2sa1225/c2983 160V
2sa1606/c4159 160V
2sa1930/c5171 180V
which all have fT > 80MHz, but some have a poor high voltage SOAR.
for a slower, fT 30 to 40MHz, but very robust driver then try
MJL15032/3
MJL15034/5

Progg70 · 23rd October 2005, 09:47 AM

Thanks…

I discover that the 2SC2922 is hard to get. Is there some good one with similar physic mount out there.

Regard

Progg70

MikeB · 23rd October 2005, 09:57 AM

Hi !

A similar physic mount might get difficult...
Try www.schuro.de , they have the sanken 2sc2922 ! Not too cheap, but preselected originals...

Mike

AndrewT · 23rd October 2005, 09:58 AM

Hi,
try 2sa1295/c3264, but it is also Sanken. Both are MT200 (Fpack) and I think very few others make them.
www.rapidelectronics.co.uk sell them both. You could try www.dalbani.com

Progg70 · 23rd October 2005, 10:13 AM

Thanks every one...

I need only to mount the transistor directly to the heat sink. It doesn’t matter what the body looks like. The performance is more importen.

jackinnj · 23rd October 2005, 01:08 PM

Randy Slone used the 2SB649A + 2SD669A in his high power Lateral MOSFET amplifiers -- Andrew has already mentioned the device -- these are TO-126 devices.

DR_PONJA · 23rd October 2005, 03:50 PM

Chack out 2SA1943.

edl · 23rd October 2005, 04:53 PM

Dear Progg70,

BD829 is a 80V, 1,5A, 8W, 250MHz device in TO-202 package.
Let's use BD139 instead them. It's a dirty cheap, "always available" device, with 80V, 1,5A, 8W (improved to 12,5W), 250MHz specifications, in TO-126 package.

Regards,

AndrewT · 24th October 2005, 01:13 PM

Hi Edl,
Bd139, fT=250MHz. Which makes can achieve this? Can you confirm if the compliment BD140 is similar?

23rd October 2005, 07:36 AM	#1
Progg70 diyAudio Member Join Date: Jul 2004 Location: Sweden	Looking for a good NPN audio driver for my power amp. I have used BD829 as audio driver. They don’t make them any longer. Anyone no what I can use instead? I have the 2SC2922 for the output in my power amplifier. Can any one tell me what is very good audio transistor NPN who I can use as a driver before the 2SC2922? Regard Progg70

23rd October 2005, 09:09 AM	#2
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	Hi, you could try 2sa649/c669 120V 2sa649a/c669a 160V 2sa1535/c3944 150V 2sa1535a/c3944a 180V 2sa1220/c2690 120V 2sa1225/c2983 160V 2sa1606/c4159 160V 2sa1930/c5171 180V which all have fT > 80MHz, but some have a poor high voltage SOAR. for a slower, fT 30 to 40MHz, but very robust driver then try MJL15032/3 MJL15034/5 __________________ regards Andrew T.

23rd October 2005, 09:47 AM	#3
Progg70 diyAudio Member Join Date: Jul 2004 Location: Sweden	the 2SC2922 is had to get Thanks… I discover that the 2SC2922 is hard to get. Is there some good one with similar physic mount out there. Regard Progg70

23rd October 2005, 09:58 AM	#5
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	Hi, try 2sa1295/c3264, but it is also Sanken. Both are MT200 (Fpack) and I think very few others make them. www.rapidelectronics.co.uk sell them both. You could try www.dalbani.com __________________ regards Andrew T.

24th October 2005, 01:13 PM	#10
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	Hi Edl, Bd139, fT=250MHz. Which makes can achieve this? Can you confirm if the compliment BD140 is similar? __________________ regards Andrew T.


	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

23rd October 2005, 09:57 AM	#4
MikeB diyAudio Member Join Date: Apr 2004 Location: Gütersloh	Hi ! A similar physic mount might get difficult... Try www.schuro.de , they have the sanken 2sc2922 ! Not too cheap, but preselected originals... Mike

23rd October 2005, 10:13 AM	#6
Progg70 diyAudio Member Join Date: Jul 2004 Location: Sweden	Thanks every one... I need only to mount the transistor directly to the heat sink. It doesn’t matter what the body looks like. The performance is more importen.

23rd October 2005, 01:08 PM	#7
jackinnj diyAudio Member Join Date: Apr 2002 Location: Llanddewi Brefi, NJ	Randy Slone used the 2SB649A + 2SD669A in his high power Lateral MOSFET amplifiers -- Andrew has already mentioned the device -- these are TO-126 devices.

23rd October 2005, 03:50 PM	#8
DR_PONJA diyAudio Member Join Date: Jul 2005 Location: Belgrade; Pinosava	Chack out 2SA1943.

23rd October 2005, 04:53 PM	#9
edl diyAudio Member Join Date: Oct 2004	Dear Progg70, BD829 is a 80V, 1,5A, 8W, 250MHz device in TO-202 package. Let's use BD139 instead them. It's a dirty cheap, "always available" device, with 80V, 1,5A, 8W (improved to 12,5W), 250MHz specifications, in TO-126 package. Regards,

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

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
This JBL driver any good ?	Foxx510	Subwoofers	11	11th December 2010 06:06 AM
good driver vs bad driver	Sujies	Multi-Way	0	14th January 2006 05:21 PM
I want to use a bad driver for a good subwoofer	red	Subwoofers	18	27th December 2003 08:28 AM
What makes a good audio power transformer?	nania	Solid State	94	29th April 2003 02:27 PM
Looking for very good bass driver	slicemaster101	Subwoofers	31	2nd September 2002 06:52 AM

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