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Supposedly have many of each in stock, and cheap. The fT is lower than original, but that should not present a problem. And yes, there were several circuits where I ran into troubles, as they were “close”, but not exact. So it is up to the characteristics being audio-friendly. Class A is the most inefficient, so yes, the constant power dissipation will shorten the life, especially if the substitute has a lower Pd.

The originals are 25W dissipation, while the substitutes are 20W dissipation. Remember when they used to be ECG. Anonb Anon Jun-6 9: Anon6f72b Anon Jun-8 3: There is evidence that the Darlington pairs had been replaced with substitutes fresh solder, part numbers differ from schema.

It’s rare to find any Sankens that are NOT counterfeit parts these days. The Sanken’s mentioned above by vintagewino may be your best substitute bets. I used them in the ’70s. Anonb to shdesigns Anon Jun-7 3: They were “ok”, but very expensive when compared to the real thing.


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Some of the alternatives are not that great lower SOA, current rating, etc. Dear Comcast, I won’t use your email service The O and Y are grades, as another person mentioned above. Octopart says no datasheet found and they ask to submit a quote request. Friend bragging about 10 year old car with really low mileag datashest Automotive ] by IowaCowboy Forward current transfer ratio hFEmin: The finals, though, is not where he allegedly has the problem. I think it ran right at the limit of current.

Would typically last a year. Shorted outputs, shorted drivers and pre drivers. All of these parts are shorted, so someone attempted repair using substitute parts and the parts failed again.

Some circuits were very specific on the characteristics of the part. Most Active Forum Topics this week I don’t share that opinion.

Of course transistors have many more crucial parameters than caps, and sometimes one has to compromise when the original part is made of unobtainium. Something in the back of my mind tells me I should have firmly turned down this job. I purchased transistors from Mouser and spend an hour grading and marking them all. It was not that they were bad, it is that thay are a generic replacement for many parts.


Class A amps were one case. Comes up not found at my regular suppliers.

2SA968 Datasheet, Equivalent, Cross Reference Search

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 datasheeh I assume it’s not what you’re after. Yeah, I’ve seen the 6. Perhaps things 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.

Rental car lied to me! It was rare but does happen. Personally, I’d tend to think that the chances of dataxheet genuine parts from Digikey is pretty good. If transistors are in parallel, they need to be matched, in order to ensure that they share the load. A little too close for comfort on the spec.

Every rebuild of this magnitude comes with a mandatory recap. I’ve seen that with 6.