Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems.

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Default 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


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"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.

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Default 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

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address)

Experience: What you get when you don't get what you want


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Default 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.

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Default 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


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Default 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?

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"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.


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sheep.
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Default 2SA1065/2SD2489 substitutes

Michael A. Terrell" wrote in message

troll.


WHY DON'T YOU SUCK MY ****ING DICK, BITCH?
  #9   Report Post  
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Default 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?



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