Lateral MOSFET replacements for 2SK1058 (Hitachi) - Page 2 - diyAudio
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Old 19th June 2002, 04:15 PM   #11
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Default Response from IRF

I sent an email to IRF's tech service center and received the following response:
06/18/2002 02:44 PM
Hitachi p/n 2SK1058, the closest IR device is IRFP240. All parameters (voltage, current) are a bit higher than the Hitachi device.
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Old 20th June 2002, 12:52 AM   #12
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Default Re: Re: Re: Lateral MOSFET replacements for 2SK1058 (Hitachi)

Quote:
Originally posted by jgwinner

Randy himself said they don't need to be matched:
quote:
---------------------------------------------------------------------------
The L-MOSFETs incorporated in the OPTI-MOS amps do not require any "matching" techniques (don't confuse L-MOSFETs with the D-MOS families used in many automobile hi-fi systems).
---------------------------------------------------------------------------
don't need to be matched?!?! Sweet!!!

Where is this quote from? I would like to read the rest of that...
I own Sloan's "high powered amp construction" as well as his "Audiophile book". I searched through both and haven't been able to find anything...

Thanks.
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Old 20th June 2002, 02:58 AM   #13
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Another Source:

http://www.reichelt.de

The 2sj162 is 5.10euro ($4.88usd) and
the 2sk1058 is 6.80euro($6.50usd)
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Old 20th June 2002, 03:50 PM   #14
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The quote from Randy Sloan was from an email he sent me, when I asked something about buying matched transistors from him.

I think I'm going to buy the IR or Exicon parts, actually, the exicon has slightly better spec's and the IR might, I have to double check a few.

There is a cross ref table, I'd already seen that, but I wasn't sure if it was an exact replacement or 'would sound as good'. Manufacturer's will cross reference stuff to sell it, it might not be completly compatible for our purposes.

I'm putting together a shopping cart at Mouser for all the parts soon (next couple of days).
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Old 21st June 2002, 09:43 AM   #15
djk is offline djk
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IR only makes D-MOS parts, they will not sub the Hitachi L-MOS.
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Old 21st June 2002, 11:47 AM   #16
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Default be careful ....

The IR devices are NOT a drop-in replacement for the Hitachi devices. The lateral devices have very different characteristics from HEXFETs. The zero tempco bias point for the Hitachis is around ~100mA; for the HEXFETs it is Amps (!), so you will have to do a bias regulator, unless you are doing Class A as Mr. Pass does.
mlloyd1

Quote:
Originally posted by jgwinner
....I think I'm going to buy the IR or Exicon parts, actually, the exicon has slightly better spec's and the IR might, I have to double check a few....
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Old 21st June 2002, 03:40 PM   #17
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Mlloyd1:

Thanks for the heads up on IR.

Do you think the Exicon parts are replacement?

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Old 5th May 2003, 04:17 AM   #18
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Default SLightly off topic.....

Can someone either input these parameters into a SPICE file or tell me how to do it?

I'm trying to put the ecx10n20 data from the pdf into a Spice model in bSPICE and it's driving me nuts. Why can't all the three letter abbreviations for all the different operating characteristics be the same. Grrrr.

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Old 5th May 2003, 01:31 PM   #19
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Default Re: SLightly off topic.....

Quote:
Originally posted by EternaLightWith
Can someone either input these parameters into a SPICE file or tell me how to do it?

I'm trying to put the ecx10n20 data from the pdf into a Spice model in bSPICE and it's driving me nuts. Why can't all the three letter abbreviations for all the different operating characteristics be the same. Grrrr.

Eternalightwithin
Here are Spice models for all the Exicon devices. I got them
from Exicon, so they should be OK.
Attached Files
File Type: zip exicon mosfet.zip (9.3 KB, 712 views)
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Old 10th June 2003, 08:23 PM   #20
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Default What makes a quiet component?

Why are certain transistors and MOSFets, etc. more quiet than others. I guess I'm asking if there is a variable that makes tem better or worse for audio? I'm assuming that the higher the voltage, beta, and bandwidth, the higher the noise.

The reason I ask is that I want to make Rangy's OptiMOS and I wanted to know what the quiestest components I could put in there. I don't think I'll need 200W version with high effeicent speakers so I was planning on lowering the wattage.

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