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Old 17th April 2004, 04:07 PM   #11
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AudioGuy's Avatar
Join Date: Jan 2004
Location: Maarssen, NL
These 6 pairs 2SJ50 + 2SK135 have now been sold for US $109,50:

2SJ50 + 2SK135 on Ebay

Apparently that is the going rate of such devices these days.

Kind regards, AudioGuy.
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Old 18th January 2005, 10:13 AM   #12
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Location: Maarssen, NL
Default Replacement equivalents

Hello all,

As an alternative to genuine Hitachi's people could also look here for replacements manufactured by Exicon/Profusion:

Profusion Exicon site

Click down to:

Equivalent chart

I have no direct experience with these, but the datasheets resemble the Hitachi sheets, and ratings seem to surpass the SJ50/SK135 ratings.

Kind regards, AudioGuy.
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Old 1st February 2005, 04:29 AM   #13
Koryusz is offline Koryusz  Hong Kong
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I have few pairs of 2SK135/2SJ50, if you need it for your AMP, pls drop me a message.

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Old 15th April 2005, 09:33 AM   #14
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Location: Helsinki
Default Hitachi SJ50/SK135 TO-3 for sale


I have twenty pairs of 2SK135/2SJ50 Hitachi in the TO3 metal package. for sale!
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Old 16th April 2005, 05:42 AM   #15
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Location: Wellington
Hi Walter,

do you have a price in mind?

I was looking for 2sk176/2sj56
but willing to consider alternatives

please let me know

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Old 16th April 2005, 05:57 AM   #16
sasha is offline sasha  Canada
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Join Date: Aug 2002
Location: Canada
Hello Walter,
Are those new fets?
How much for 10 pairs and can you match them?
Thank You.
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Old 11th September 2005, 05:07 PM   #17
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Join Date: Jan 2004
Location: Koskenkorva Land
Hi all,

I found this thread of an occasion, I happen to have a uniqe batch of 12 2SJ50 and 12 2SK135.

They all have the same batch number, yes, both N and P ch.!

I worked for a small swedish company around 1989-1990 who sells Elektor building kits in Sweden so I have myself packed these transistors, and they are still in the same packing after 15 years.

I have not thought about to sell them, but I might sell if I get the right offer and the intendent buyer buys all, so please don't ask me for selling only partialy.

If you are interested then put your bid here, don't e-mail me your bid, and I will consider it.

Regards Michael
"If transistors are blueberries and FETs are strawberries, then tubes must be.. pears"
Michael 29th January 2010
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