The next best thing to 2SK389 / 2SJ109 ? - Page 7

miklos · 20th March 2009, 11:53 PM

I'll try to sketch the jig & resistor schematic and post later.
__________________
regards Andrew T.

When?

Lumba Ogir · 21st March 2009, 06:20 AM

Hannes,
the possibilities of reducing distortion by matching are strongly limited so don`t expect much. The benefit of matching depends on topology, biasing and operational conditions. As you don`t have any control over most parameters, die design and manufacturing quality generally is more important. There is so much to do about distortions caused by other mechanisms, you should concentrate on that part instead.

h_a · 21st March 2009, 02:06 PM

Jeez, Lumba you really missed all the fun?

I posted already 2 parts on jfet matching and distortion:

Part 1 - Common Source

Part 2 - LTP

I hope to find time to do part 3 - complementary circuits!

Have fun, Hannes

les_garten · 12th November 2009, 04:15 PM

Hello,
I'm looking for about 12 of these heatsinks. I'm in the US. I talked with Lucdunhil but it doesn't look like he has anymore. Anybody got some of these left?

Les

EUVL · 12th November 2009, 06:30 PM

Contact Mark at the GB thread :

Toshiba Dual JFET Heatsink

He will sort you out.
There is a handling charge for orders below 25 pieces.

Patrick

ace7one · 14th June 2010, 03:32 PM

I would like some of these heatsinks. Where did you get them? Is there another groupbuy going?

EUVL · 15th June 2010, 08:25 AM

Just go to the last page of the Group Buy thread and contact MarkLai directly.
We have different versions in stock.
Please read through the last 3 or 4 pages.

BR,
Patrick

20th March 2009, 11:53 PM	#61
miklos diyAudio Member Join Date: Jul 2004 Location: toronto	I'll try to sketch the jig & resistor schematic and post later. __________________ regards Andrew T. When? __________________ miklos

21st March 2009, 02:06 PM	#63
h_a diyAudio Member Join Date: Sep 2006 Location: Graz, Austria	Jeez, Lumba you really missed all the fun? I posted already 2 parts on jfet matching and distortion: Part 1 - Common Source Part 2 - LTP I hope to find time to do part 3 - complementary circuits! Have fun, Hannes __________________ fresh matched IRFP240/IRFP9240 fets \|\| AlephJ/JX-kits F5 transistor kits \|\| Burning Amp BA-1/2 transistor kits

14th June 2010, 03:32 PM	#66
ace7one diyAudio Member Join Date: Apr 2008	I would like some of these heatsinks. Where did you get them? Is there another groupbuy going? __________________ TDA

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21st March 2009, 06:20 AM	#62
Lumba Ogir Banned Join Date: Apr 2005 Location: Stockholm	Hannes, the possibilities of reducing distortion by matching are strongly limited so don`t expect much. The benefit of matching depends on topology, biasing and operational conditions. As you don`t have any control over most parameters, die design and manufacturing quality generally is more important. There is so much to do about distortions caused by other mechanisms, you should concentrate on that part instead.

12th November 2009, 04:15 PM	#64
les_garten diyAudio Member Join Date: Dec 2008	Hello, I'm looking for about 12 of these heatsinks. I'm in the US. I talked with Lucdunhil but it doesn't look like he has anymore. Anybody got some of these left? Les

12th November 2009, 06:30 PM	#65
EUVL diyAudio Member Join Date: Oct 2003	Contact Mark at the GB thread : Toshiba Dual JFET Heatsink He will sort you out. There is a handling charge for orders below 25 pieces. Patrick

15th June 2010, 08:25 AM	#67
EUVL diyAudio Member Join Date: Oct 2003	Just go to the last page of the Group Buy thread and contact MarkLai directly. We have different versions in stock. Please read through the last 3 or 4 pages. BR, Patrick