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Old 27th September 2006, 05:44 AM   #1
Marito is offline Marito  Argentina
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Please take a look at this schematic that i found at http://users.swing.be/edwinpaij/ampli_mosfet_simple.htm and tell me your opinion(or anyone in this forum),if it can be work well, at least it seems to be a decent circuit, with more controls to adjust it (I don´t want to explode mosfet´s because are more expensive that the BJT´s).
Even in this page there is an upgrade version of this amp with some components but that.
Also if somebody build it that write a comment
Thanks to all
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Old 27th September 2006, 07:01 AM   #2
AndrewT is offline AndrewT  Scotland
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Hi Marito,
your in the wrong thread.
Try starting your own enquiry.
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Old 27th September 2006, 07:20 AM   #3
rlg_200 is offline rlg_200  Philippines
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marito,

you say mosfet is expensive, but according to ur schematic it is also a mosfet amp, I am familliar with that circuit, but I did not build that so far. it is uses a mosfet power of IRFP240 N TYPE, AND IRFP9240 P TYPE

u can visit aussieamplifiers it uses almost same topology.

rlg
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Old 27th September 2006, 05:49 PM   #4
anatech is offline anatech  Canada
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Hi rlg_200,
Good points.

Caps and more punctuation would make your posts easier to read.

Hi Andrew,
Quote:
Hi Marito,
your in the wrong thread.
Try starting your own enquiry.
Agreed. This one is too long already.

-Chris

Edit: Marito, you have your own thread now!
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Old 27th September 2006, 06:29 PM   #5
MikeB is offline MikeB  Germany
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My first thought seeing the schematic: Oh no, not again an amplifier using IRFs without thermal compensation... DON'T !!!

Mike
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Old 27th September 2006, 06:37 PM   #6
ilimzn is offline ilimzn  Croatia
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Quote:
Originally posted by rlg_200 marito,
you say mosfet is expensive, but according to ur schematic it is also a mosfet amp, I am familliar with that circuit, but I did not build that so far. it is uses a mosfet power of IRFP240 N TYPE, AND IRFP9240 P TYPE
NO it certainly does not!!!
Anyone using IRFP parts in this configuration will get exactly what they deserve, and that is smoking IRF parts. This schematic is intended for lateral MOSFETs ONLY and is in fact an almost verbatim reproduction of an application note for Hitachi lateral MOSFETs. I am currently aware of only 3 manufacturers of lateral MOS, two being original (Hitachi and Magnetec) and the third, which name escapes me now, being a second source for obsolete Hitachi parts.
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Old 27th September 2006, 10:25 PM   #7
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Default app note

Quote:
Originally posted by ilimzn
[B]

...an almost verbatim reproduction of an application note for Hitachi lateral MOSFETs....
Can you point us to this document?

Thanks,

Shawn.
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Old 28th September 2006, 01:23 AM   #8
Leolabs is offline Leolabs  Malaysia
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This circuit was originally intended for Hitachi's lateral FET,the old 2SK135/2SJ50.
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Old 28th September 2006, 02:25 PM   #9
jaycee is offline jaycee  United Kingdom
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Quote:
Originally posted by ilimzn
I am currently aware of only 3 manufacturers of lateral MOS, two being original (Hitachi and Magnetec) and the third, which name escapes me now, being a second source for obsolete Hitachi parts.
Exicon?
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Old 28th September 2006, 03:40 PM   #10
AndrewT is offline AndrewT  Scotland
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Renesas

Types include
2sj160/1/2 & 2sk1056/7/8
2sj81/2/3 & 2sk225/6/7
2sj48/9/50 & 2sk133/4/5
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