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Yeah, I’ve seen the 6. That was troublesome even 30 years ago! Anonb Anon Jun-6 9: Would typically last a year. Rental car lied to me! Most Active Forum Topics this week I’ve already sunk several hours in researching these discontinued parts. Anon6f72b Anon Jun-7 1: You mean re-marked so it’s not what it’s supposed toor just a fake manufacturer, so a possibly inferior product can command a higher price?
2SA Datasheet(PDF) – New Jersey Semi-Conductor Products, Inc.
Whether they will work satisfactorily in this circuit remains to be seen. And, if they’re made of unobtainium, yes, good luck. Anon6f72b Anon Jun-8 3: Perhaps 2sa68 have changed, but, when I used to use NTE substitutes, I never had a bad one out off the box and none of them failed after being installed. Remember when they used to be ECG.
My biggest concern is having the amplifier come back a month later because the parts didn’t last. If transistors are in parallel, they need dqtasheet be matched, in order to ensure that they share the load.
I managed to get 32 devices that matched to my tolerance. The risk of having one fail and take out a half dozen expensive output transistors, plus devices on the driver board, seems too risky.
Toshiba 2SA Datasheet.
Went to an MJ, and they lasted a tad over 10 years. Anonb Anon Jun-8 Anon6f72b to Anonb Anon Jun-7 1: Repairing a Sansui G One circuit I worked on used to use an MJ I think it ran right at the limit of current. Some circuits were very specific dataasheet the characteristics of the part. Every rebuild of this magnitude comes with a mandatory recap.
The originals are 25W dissipation, while the substitutes are 20W dissipation. Then again, this was around 10 years ago and earlier. Were the replacements matched?
They were “ok”, but very expensive when compared to the real thing. Also the MV diodes get replaced, as these are notorious for failing and turning on both halves of the output stage simultaneously. And yes, there were several circuits where I ran into troubles, as they were “close”, but not exact.
The output transistors appear to be original Sanken RETs. It’s like that feeling when you step into a mud puddle and discover it is much deeper than it looked and you find yourself up to your knees in mud and think “well, I may as well keep going. Class A amps were one case. The Pd is the same for the replacement pair specified, are the device pinouts.
2SA968 Datasheet, Equivalent, Cross Reference Search
I told him it’s not worth more than a grand in non-working condition, but he was unable to negotiate cheaper and badly wants this receiver. Obviously, certain critical parameters have to be met, but even then, operating something close the edge could still lead to early failures. Parts Express has the NTE parts. I purchased transistors from Mouser and spend an hour grading and marking them all. Shorted outputs, shorted drivers and pre drivers.
It’s rare to find any Sankens that are NOT counterfeit parts these days. None of which give me a whole lot of peace of mind though. So it is up to the characteristics being audio-friendly. Just did a search on digikey with a few additional cases that should mount onto a TO heatsink, and not very many results, and of those many are BU’s, which are switching transistors and I assume it’s not what you’re after.
I think the op simply wants the exact same components.