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Old 11th April 2005, 09:43 AM   #1
diyAudio Member
 
Join Date: Apr 2004
Location: Wellington
Default Wanted 2SK176 - 2SJ56

Hi,

I'm looking for Hitachi Mosfets - 2SK176 & 2SJ56

(yeh I know I'm about 10 years to late)


I'd like 14 of each,
so may be willing (need to) to consider smaller quanities.

I can be reached at

poor_lackey@hotmail.com



Thanks
Tony
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Old 11th April 2005, 11:08 AM   #2
Electrons are yellow and more is better!
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http://www.renesas.com/fmwk.jsp?cnt=...r_mos_gen_amp/

Here you have similar types. Hitachi has changed it's name to Renesas.

BTW: Have you done some Googling?
I used 2SK175 2SJ56 as keywords and got this:

http://www.google.com/search?q=2SK17...utf-8&oe=utf-8


http://www.sound-smith.com/fets/

I have original part in the original box of Hitachi 2SK135 and 2SJ50 for sale if they will do.
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Old 11th April 2005, 09:01 PM   #3
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Join Date: Apr 2004
Location: Wellington
Thanks,

definately after the TO3 package............

I had checked out the web and found a couple of sites offering the fets - like the site you mentioned.
but while I'd consider selling the family (well selected items) to fund the obsession, the boss may have some issue with the concept.

So was hoping to find someone willing to part with a few at prices similar to the ones discussed @ diyaudio 1-2 years ago - thus avoiding unwanted domestic disharmony.

Or perhaps if there is interest from others, I can investigate purchasing a larger quantity of NOS
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Old 11th April 2005, 11:09 PM   #4
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Join Date: Aug 2004
Location: Illinois
Checkout the profusion web site. Its Exicon MOSETs are very similar to the original Hitachi devices, and you don't have to pay those outrageous prices listed by sound-smith:

http://www.profusionplc.com/hitachi.htm

I am using some Exicon devices along with Hitachis and find no difference in their sound.

http://www.profusionplc.com/exicon.htm

I have a few SK134/SJ49 -TO3 devices and can match them with an original Hafler MOSFET checker. But they don't work at the same rails voltage levels as the ones you specified.
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Old 12th April 2005, 02:12 AM   #5
KBK is offline KBK  Canada
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I know of a guy who sells matched sets. sometimes 16 matched, of each type. I tried to email you via the board but.. no go. And, I'm not willing to share with the forum here, until I get mine! I'd better get them soon..

BIG QUESTION:

If an amplifier uses the 135-50's..can one simply swap in the 176-56's?? or are the two dissimalar enough that it can't be done? I mean with no changes, other than the output device swap?
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Old 12th April 2005, 02:35 AM   #6
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Join Date: Apr 2004
Location: Wellington
Dick - thanks for suggestion
Exicons may be a good option, I will have a surf & see if anyone can confirm compatibility.


KBK - email address should be ok,

I think the 176-56's can be used as direct replacements for the lower spec'd devices, but would wait for someone smarter than I to confirm before taking the plunge.


If typing my email address
beware the _ which doesn't show up when an application underlines the email address
poor_lackey bla bla bla



Regards
Tony
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Old 13th May 2005, 03:40 AM   #7
KBK is offline KBK  Canada
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OK!!

I finally managed to get ahold of the guy I buy them from..let me
see what I paid....

ok. I paid $10.31 US each, for

16 matched N-channel
and 16 matched P-channel.

All matched together, and this matching done on a custom piece of equipment, designed specifically to match these fets. Dave Haflers old equipment.

Get ahold of me if you still need them! I'll direct you to the guy who has the stash.
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Old 13th May 2005, 05:13 AM   #8
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Join Date: Apr 2004
Location: Wellington
mmmmmmmmmm,

I'm torn,
domestic bliss or high power hitachis?

tough decision

.................................Not

KBK emailed,
waiting for fallout from she who must be obeyed (and bank manager)
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Old 13th May 2005, 12:53 PM   #9
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Join Date: Aug 2004
Location: Illinois
This thread is confusing. What rails voltages will you use? These Hitachis came for use in 3 main voltage levels. They are backwards compatible so those specified for 90 VDC can operate at 65 VDC, but not the reverse.

Tell us the operating voltages you will be using then we can be more specific about which devices to use and where they can be found.

Dick
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Old 13th May 2005, 07:23 PM   #10
KBK is offline KBK  Canada
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I've modded the capacitance level in my Belles 450 soooo....much, and the AC voltage around here is so elevated..that the DC rails are at 90-95 volts! So I'm upping the output pairs from 135-50, to the 176-56 units. Plus, I'm putting 0.2ohm caddocks in for emitters and seprating the dual wound transformer, to make the unit true dual mono. Should be a nice unit after that, I hope. Typical Fet sound though. Can't do much about that.
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