CR 1020 Learning experiance.
- Thread starter Slickrambler
- Start date
Slickrambler
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This is the explanation I was needing to help me in finding parts for myself hopefully .
[QUOTE="Nashou66, post: 10240775, member:, I think this one is more what you need.
http://www.mouser.com/ProductDetail/ON-Semiconductor/TIP29BG/?qs=sGAEpiMZZMshyDBzk1/Wi/PUgtclNldl9Z0g3rVX7ak=
Here is the original data sheet 2SC1212B and here is the new part TIP29BG
you need to match NPN, Vcbo,Vceo, Vebo, Ic and also Vce(saturation)
Or as close as possible, not lower but a little higher usually
[QUOTE="Nashou66, post: 10240775, member:, I think this one is more what you need.
http://www.mouser.com/ProductDetail/ON-Semiconductor/TIP29BG/?qs=sGAEpiMZZMshyDBzk1/Wi/PUgtclNldl9Z0g3rVX7ak=
Here is the original data sheet 2SC1212B and here is the new part TIP29BG
you need to match NPN, Vcbo,Vceo, Vebo, Ic and also Vce(saturation)
Or as close as possible, not lower but a little higher usually
Slickrambler
Active Member
What is a good source for original DataSheets ? I found this one is there any others ? Ok looking at this closer I find it difficult or useless . Datasheets & application notes - Datasheet Archive Search Engine
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I just google the part number and look at all of the data sheets that ACTUALLY to pertain to that part. Some are not even close
And if I want an original part of the same part number I first try UTsource , they are in China but I think they are reputable .
And if they don't have a part they try to find a source , I ask them to test it too, just in case. If they actually do I don't know but so far
they helped me on a few transistors I couldn't source and there were no similar new parts.
Athanasios
Slickrambler
Active Member
http://www.mouser.com/ds/2/149/BD439-888568.pdf I did a search on the 2SC1212B and came up with this . What do you think Nashou66 ? http://www.mouser.com/ProductDetail/Fairchild-Semiconductor/BD439S/?qs=/ha2pyFadugLYtBeBmyjLFltA0F%2b2oZp5gGA75pBH7U=
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Slickrambler
Active Member
Man this gets so confusing . I'm looking at the part you found and it not the same style. May not attach to the heat sink properly . Take a look .
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It will fit, look at the dimensions, they are almost exact. The parts also have a little leeway +/- .
2SC1212
2N4923G
I think the part I chose is closer to the original .
So go with this part. I think you quoted my first choice but in another post I got the correct one here:
http://www.mouser.com/ProductDetail/ON-Semiconductor/2N4923G/?qs=sGAEpiMZZMshyDBzk1/Wi/PUgtclNldlPXbFLTabbos=
Nashou
Slickrambler
Active Member
I think I'll go with this TO126 like the original . Your suggesting the TO225. I know your more experienced then me. And I respect that. Tell me what you think about this one please ? And the 2N4923G are on back order. http://www.mouser.com/ds/2/149/BD439-888568.pdf
Where was this transistor located ? Oh on the main amp board.
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Slickrambler
Active Member
Main C. Board TR611 Does the B on the end of the part number mean anything ? 2SC1212B
Slickrambler
Active Member
Thanks again avionic. R603 on the same board says 5P 2.2K cement molded resistor. That fused resistor what does the 5P stand for?
5P = 5 watt
B suffix indicates usually higher voltage ie C1212 ---> 1212A higher than 1212 ----> 1212B higher than 1212A. The KSC2690AY should cover it at 160v
http://www.mouser.com/ds/2/149/KSC2690A-889454.pdf
B suffix indicates usually higher voltage ie C1212 ---> 1212A higher than 1212 ----> 1212B higher than 1212A. The KSC2690AY should cover it at 160v
http://www.mouser.com/ds/2/149/KSC2690A-889454.pdf
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But....... In this case I think the B designates the Hfe rank. The KSA2690AY is still the way to go.
Slickrambler
Active Member
R603 on the same board says 5P 2.2K cement molded resistor. Once again is this even close ? http://www.mouser.com/ProductDetail/Welwyn-Components-TT-Electronics/WHS5-2R2JT075/?qs=sGAEpiMZZMtivf%2b6cIaZXk9OnosK/r8o
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Slickrambler
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Yes he is the man for sure .This is why I said wait for someone with more knowledge
avionic is the man !!!
Nashou
Slickrambler
Active Member
This fused resistor is measuring 69.3ohms out of circuit supposed to be 2.2 ohms R603 . Or I just totally don't know what I'm doing. I thought I had a little grasp .
?
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