2sj200 ??

[B.I.G]

i have this schematic ! can i put 2sj200 and 2sk1529 instead of those fet`s ??


how much power can you get out of an pair?

 

[UrSv]

Convoluted atachments

How about posting a picture instead of a recursive archive...

 

[Netlist]

At first look it could work. Watch the pinout. It's different.

2SJ352: V-MOS, NF-L, 200V, 8A, 100W, 320/120ns GSD
2SJ200: V-MOS, NF-E, 180V, 10A, 120W GDS

For more in-depth details try to find the datasheets.
Here's the unrar'd pdf:

/Hugo

 

[Netlist]

.

 

[B.I.G]

shouldn`t be a thermal sensing device for thermal compensation ??

i thought that only with lateral devices can you set the bias with a simple pot

i don`t know alot about amplifiers

 

[B.I.G]

 

[B.I.G]

is the 2sj200/201 suited for lateral designs ?

 

[Netlist]

Be patient, B.I.G, you will get an answer...perhaps from the “mosfet chef” himself. (Nelson)
Me too I don't know enough to answer you.

/Hugo

 

[MikeB]

Hi !

According to: (And datasheet)
http://www.diyaudio.com/forums/showthread.php?s=&threadid=40700

The sj201 is not a lateral and needs thermal compensation.
The showed amplifier (from aussieamplifiers i believe) is only
for lateral devices.

Mike

 

[brettlee]

hey brettlee
Please post in english only

 

[bear]

The amp shown looks like it will work, but it is a very rudimentary design. For example, no Vbe multiplier for bias, just a pot, no AC bypass cap on that either...

No reason not to use the Toshibas... although off the top of my head I do not know if it has a negative tempco or positive, and at what temperatures... one could "borrow" the sort of thermistor thing that NP has used elsewhere. Although one would probably just arrange the thermistors to work with a Vbe circuit... usa a lot of heatsink and don't worry about it??

The Hitachi types from Renasas and OnSemi (iirc) will be fine.

There are all sorts of neat amps here on DiyAudio, I'd investigate them first...

_-_-bear

 

[ilimzn]

Here we go again...

Answer: NO you cannot use the Toshibas in place of the Hitachi MOSFETs. You could use hitachi 2SJ162/2SK1058 as a slightly (1/8) less rated alternative that is also easyer to get. Use of Toshiba MOSFETs requires modifying the schematic to include a thermally compensated bias, also it may require some subtle but important changes in compensation and oscillation prevention for the amp. Also, the pinout is different which will be a problem if it's a finished PCB.