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

[Brian Guralnick]

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]

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]

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]

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]

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]

nm

 

[jcarr]

nt

 

[stadams]

Thanks.

Thanks for the info.

 

[hifidaddy]

Re: The only problem here

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]

Re: Re: The only problem here

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...