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#1
Posted to sci.electronics.components,sci.electronics.repair,rec.audio.tech
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2SA1065/2SD2489 substitutes
I'm working on a Technics audio amp from the late 70's with blown outputs.
I've found one source (in Europe) for these transistors, but they're asking $20 each for them and I am concerned about counterfeits. They are 150V 10A 120W, with an f(T) of 50MHz... they are faster than anything I can find out there. 1. Is it important that I replace them with units with comparable current-bandwidth product? 2. Can anyone recommend a substitute? I was thinking maybe MJ21195/96, but they're only 4MHz. 3. Can anyone recommend a source for NOS Jap transistors that sells these? Thanks Dave |
#2
Posted to sci.electronics.components,sci.electronics.repair,rec.audio.tech
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2SA1065/2SD2489 substitutes
"Dave" wrote in message news:W2sfk.369$Ou3.337@edtnps82... I've found one source (in Europe) for these transistors, but they're asking $20 each for them and I am concerned about counterfeits. Make that 20 Euro, so $32/ea. |
#3
Posted to sci.electronics.components,sci.electronics.repair,rec.audio.tech
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2SA1065/2SD2489 substitutes
"Dave" wrote in message news:25sfk.370$Ou3.88@edtnps82...
"Dave" wrote in message news:W2sfk.369$Ou3.337@edtnps82... I've found one source (in Europe) for these transistors, but they're asking $20 each for them and I am concerned about counterfeits. Make that 20 Euro, so $32/ea. Consolidated Electronics Inc. is a US company, but they list stock for both devices. http://www.ceitron.com/semi/semi.phtml?part=2SA1065 ($4.00 US) and http://www.ceitron.com/semi/semi.phtml?part=2SD2489 ($11.95 US). Can't vouch for authenticity... but I've used CEI for several years and have had no problems with counterfeits. Contact info: Toll Free: 1-800-543-3568 Consolidated Electronics P.O. Box 20070 Dayton, Ohio 45420 USA -- Dave M MasonDG44 at comcast dot net (Just substitute the appropriate characters in the address) Experience: What you get when you don't get what you want |
#4
Posted to sci.electronics.components,sci.electronics.repair,rec.audio.tech
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2SA1065/2SD2489 substitutes
3. Can anyone recommend a source for NOS Jap transistors that sells these? Why don't you try rephrasing that question you racist cock-suck. |
#5
Posted to sci.electronics.components,sci.electronics.repair,rec.audio.tech
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2SA1065/2SD2489 substitutes
On Wed, 16 Jul 2008 17:19:23 -0400, "DaveM"
wrote: "Dave" wrote in message news:25sfk.370$Ou3.88@edtnps82... "Dave" wrote in message news:W2sfk.369$Ou3.337@edtnps82... I've found one source (in Europe) for these transistors, but they're asking $20 each for them and I am concerned about counterfeits. Make that 20 Euro, so $32/ea. Consolidated Electronics Inc. is a US company, but they list stock for both devices. http://www.ceitron.com/semi/semi.phtml?part=2SA1065 ($4.00 US) and http://www.ceitron.com/semi/semi.phtml?part=2SD2489 ($11.95 US). Can't vouch for authenticity... but I've used CEI for several years and have had no problems with counterfeits. Contact info: Toll Free: 1-800-543-3568 Consolidated Electronics P.O. Box 20070 Dayton, Ohio 45420 USA There are very few sources for bipolar transistors being manufactured using 'mesa' or 'hometaxial' chip structures. Planar parts are often labelled and marketed with the older numbers without meeting their isb capability. Valid PNP parts may be rare as hen's teeth, as they had few industrial applications, where ruggedness was appreciated ($). Mind you, mesa parts also weren't noted for high ft. This was considered as an advantage in audio, as the components in the final stage had predetermined limits. If you see 47-150pF tacked collector to base on the final stage, they were throwing the parts' ft statistic away, in any event. - it was virtually impossible to get PNP and NPN parts with similar current and voltage ratings to exhibit similar frequency or capacitive characteristics. (typical factor 2:1 in favour of NPN for speed). This is one reason why ft was a 'typical' (untested) characteristic with these audio parts, rather than a (tested) minimum. When local compensation was used, it was likely unequal, to take this into account. RL |
#6
Posted to sci.electronics.components,sci.electronics.repair,rec.audio.tech
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2SA1065/2SD2489 substitutes
In article ,
Curtis Brown wrote: 3. Can anyone recommend a source for NOS Jap transistors that sells these? Why don't you try rephrasing that question you racist cock-suck. Is it racist to refer to me as a Scot since I'm from Scotland? Call me Dave when I was christened David? Call someone Tex? -- *It is wrong to ever split an infinitive * Dave Plowman London SW To e-mail, change noise into sound. |
#7
Posted to sci.electronics.components,sci.electronics.repair,rec.audio.tech
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2SA1065/2SD2489 substitutes
"Dave Plowman (News)" wrote: In article , Curtis Brown wrote: 3. Can anyone recommend a source for NOS Jap transistors that sells these? Why don't you try rephrasing that question you racist cock-suck. Is it racist to refer to me as a Scot since I'm from Scotland? Call me Dave when I was christened David? Call someone Tex? Don't feed the troll. -- http://improve-usenet.org/index.html If you have broadband, your ISP may have a NNTP news server included in your account: http://www.usenettools.net/ISP.htm Sporadic E is the Earth's aluminum foil beanie for the 'global warming' sheep. |
#8
Posted to sci.electronics.components,sci.electronics.repair,rec.audio.tech
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2SA1065/2SD2489 substitutes
Michael A. Terrell" wrote in message
troll. WHY DON'T YOU SUCK MY ****ING DICK, BITCH? |
#9
Posted to sci.electronics.components,sci.electronics.repair,rec.audio.tech
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2SA1065/2SD2489 substitutes
well, why dont you get ya faggot mates to do that ?
"Curtis Brown" wrote in message ... Michael A. Terrell" wrote in message troll. WHY DON'T YOU SUCK MY ****ING DICK, BITCH? |