• June 12, 2019

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Toshiba 2SA Datasheet.

Widespread Centurylink Outage this morning The originals are 25W dissipation, while the substitutes are 20W dissipation. Anon6f72b to Anonb Anon Jun-7 1: The output transistors appear to be original Sanken RETs. Of course transistors have many more crucial parameters than caps, and sometimes one has to compromise when the original part is made of unobtainium. Shorted outputs, shorted drivers and pre drivers. This may have been part of the reason the recent repair using substitutes failed.


Anonb Anon Jun-6 9: I think it ran right at the limit of current. I don’t share that opinion. Yeah, I’ve seen the 6. 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 2s9a68 your knees in mud and think “well, I may as well keep going. Dear Comcast, I won’t use your email service Also the MV diodes get replaced, as these are notorious for failing and turning on both halves of the output stage simultaneously.

Would typically last a year. I’ve seen that with 6. Anon6f72b to Anonb Anon Jun-7 2: Some circuits were very specific on the characteristics of datxsheet part. Class A amps were one case. Anonb Anon Jun-7 5: None of which give me a whole lot of peace of mind 2sw968. Something in the back of my mind tells me I should datasheeet firmly turned down this job. Comes up not found at my regular suppliers.

The O and Y are grades, as another person mentioned above.


Anon6f72b to Anonb Anon Jun-7 3: The substitute parts have a higher Ic, as well. The fT is lower than original, but that should not present a problem.

Anon6f72b Anon Jun-7 1: Replacing them with 10V caps solved the issues. My biggest concern is having the amplifier come back a month later because the parts didn’t last.

They really ARE made of unobtainium! There are people that argue that matching isn’t critical datzsheet emitter resistors are employed. I can’t even find a datasheet for 2SC on the web.

2SA968 Datasheet, Equivalent, Cross Reference Search

Went to an MJ, and they lasted a tad over 10 years. The Sanken’s mentioned above by 2saa968 may be your best substitute bets. Were the replacements matched? Then again, this was around 10 years ago and earlier. Forward current transfer ratio hFEmin: