Need matched dual NPN transistors for I/V stage, quietest JFET for output buffer. - Page 3

Brian Guralnick · 29th October 2002, 05:01 AM

For matched Quads, I think that Analog devices MAT-04 would be your best bet. In fact, using 2 of Analog Devices' MAT-02 would probably be a better match than 1 Quad from Motorola's quad line.

ppl · 29th October 2002, 09:49 AM

Brian> You are right if the Application is small signal like a Diff Amp I have used Mat-02's and MAT-03's as Diff Amps in Discreet component Headphone Amps, However the Motorolla Devices I use have Higher Current ratings and I use them as as Output Stage Buffers in Some of my Headphone Amp Designs and thay take up alot less space than separate Transistors Plus having Both PNP & NPN types on the same Chip greatly improves thermal tracking.

Brian Guralnick · 29th October 2002, 01:04 PM

Quote:

Originally posted by ppl
Brian> You are right if the Application is small signal like a Diff Amp I have used Mat-02's and MAT-03's as Diff Amps in Discreet component Headphone Amps, However the Motorolla Devices I use have Higher Current ratings and I use them as as Output Stage Buffers in Some of my Headphone Amp Designs and thay take up alot less space than separate Transistors Plus having Both PNP & NPN types on the same Chip greatly improves thermal tracking.

Are any of you headphone amp schematics publically available?

ppl · 29th October 2002, 01:19 PM

See Attached Schematic of my pocket battery Operated unit. If discreet component is what you want post I will try to attach but it is a large file and may not attach

jcarr · 29th October 2002, 11:44 PM

stadams:

>I have searched for a data sheet for the 2SC3381<

2SC3381 & 2SA1349, data sheets, zipped pdf format, separate files per page because of filesize limitations.

Hope this helps, jonathan carr

jcarr · 29th October 2002, 11:47 PM

nm

jcarr · 29th October 2002, 11:48 PM

nt

stadams · 30th October 2002, 12:38 PM

Thanks for the info.

hifidaddy · 27th February 2003, 02:32 PM

Quote:

Originally posted by Fred Dieckmann
that and the fact that the Toshibas will sound better.

Dual Toshiba fets 2SK389 and 2SJ109

But what do I know,
Fred

Fred,

did you compare linear systems' transistors with Japanese originals ? and what did you find out ?

regards,
Hartmut from Munich

UrSv · 27th February 2003, 03:55 PM

Quote:

Originally posted by hifidaddy

Fred,

did you compare linear systems' transistors with Japanese originals ? and what did you find out ?

regards,
Hartmut from Munich

Expect no answer before March 10th or so as Fred is in the bin until about that time...

29th October 2002, 05:01 AM	#21
Brian Guralnick diyAudio Member Join Date: Mar 2002 Location: Montreal, Quebec, Canada	For matched Quads, I think that Analog devices MAT-04 would be your best bet. In fact, using 2 of Analog Devices' MAT-02 would probably be a better match than 1 Quad from Motorola's quad line. __________________ _______ Brian

30th October 2002, 12:38 PM	#28
stadams diyAudio Member Join Date: Mar 2002 Location: South MS	Thanks. Thanks for the info. __________________ -Todd

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
Matched PNP/NPN dual transistors	carlmart	Solid State	31	25th January 2012 10:36 PM
Adding more transistors to output stage?	bowdown	Solid State	6	19th January 2007 07:15 PM
Has Anyone else used MJE13005's Switching Transistors for the output stage.	John Biles	Solid State	30	3rd September 2005 06:02 AM
5 transistors output stage	KCC	Solid State	6	30th June 2003 01:52 PM
50 Output Stage Transistors?	thylantyr	Solid State	22	26th April 2003 10:44 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

29th October 2002, 09:49 AM	#22
ppl diyAudio Member Join Date: Apr 2001 Location: Seattle, WA U.S.A.	Brian> You are right if the Application is small signal like a Diff Amp I have used Mat-02's and MAT-03's as Diff Amps in Discreet component Headphone Amps, However the Motorolla Devices I use have Higher Current ratings and I use them as as Output Stage Buffers in Some of my Headphone Amp Designs and thay take up alot less space than separate Transistors Plus having Both PNP & NPN types on the same Chip greatly improves thermal tracking.

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