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Old 15th September 2013, 02:10 PM   #611
Mooly is online now Mooly  United Kingdom
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Not an R or should that be Another from a different batch has L5YS as the code. These were Sony supplied devices for the SLC7UB betamax VCR if I recall correctly.

I've no idea what the letters stand for and what the differences in selection might be.
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Old 15th September 2013, 02:16 PM   #612
jan h is offline jan h  Denmark
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Could it be the housing, like the BUT11AF is isolated?
Anyway only the TU version is in stock, so I guess it'll have to do.
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Old 15th September 2013, 02:24 PM   #613
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Dunno. These are standard packages with all metal tabs.
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Old 15th September 2013, 03:32 PM   #614
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TU just means supplied in tubes, as opposed to loose, or on tape.
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Old 15th September 2013, 04:01 PM   #615
jan h is offline jan h  Denmark
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Ah OK, so the transistors are the same, thanks, jaycee
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Old 15th September 2013, 06:52 PM   #616
amc184 is offline amc184  New Zealand
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I bought the KSC2335s from Futurlec, where they were listed as 2SC2335s. The 2SC2335-K is equivalent to a KSC2335-Y, the NEC ones were binned M, L, K, while the Fairchild replacements are binned R, O and Y, but the ranges of each bin are the same.

It looks like the digikey listing was for KSC2335-Rs in particular, which is good, those are the best match I think. I'll see if I can match any that I have left.
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Old 15th September 2013, 10:00 PM   #617
jan h is offline jan h  Denmark
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Thanks
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Old 6th October 2013, 10:17 AM   #618
jan h is offline jan h  Denmark
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Have you powered it up yet, amc184?
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Old 7th October 2013, 08:36 AM   #619
amc184 is offline amc184  New Zealand
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No. The last of the parts for it arrived, and I've installed them, but I've not found the time to actually power it up yet. There'll be a few parts to it as well, I'll have to test out the HV rectifier and softstart on the mainboard first.
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Old 3rd January 2014, 01:53 PM   #620
jan h is offline jan h  Denmark
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Time for a update

I'm pretty sure the 2023's from Dönberg are fakes, the PSU made the familiar high pitch sound, only about 60V output, and after less then a minutte they shorted...

The good news is the KSC2335RTU from mouser works perfectly, no high pitch sound, could easy adjust output to 99V, the speaker relay click in, and the amp plays

Another sign that the 2023's are fake is the hFe, on 15 transistors whit same markings it ranges from 9.5 to 38.
Where as the KFC2335RTU's all 15 transistors measure between 20 and 21.

As for the meter light not working, the bulbs are not original, so the big question is what V and mA should they be?

I'm pretty sure they should be around 6.3V, but some say 250mA others say 70mA.
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