ianmgull
New Member
I placed an order with these, I'll let you guys know if I blow up.
http://www.mouser.com/ProductDetail...=sGAEpiMZZMshyDBzk1/Wi9NZvtrCxX3LH9AISc2zENc=
http://www.mouser.com/ProductDetail...=sGAEpiMZZMshyDBzk1/Wi9NZvtrCxX3LH9AISc2zENc=
I thought those had been discontinued by Fairchild...maybe On Semi brought them back? In any case, those would be fine driver transistors.
in my Mouser project BOM if you look under the Customer Part number column, for both the MJE150132 and MJE15033 parts, select the icon that looks like a page with pencil, I wrote notes for sub's
If you use MJE15031G also use it complement MJE15030G
FJP1943/FJP5200 should work, just have to check that you can set o/p bias correctly.
If FJP1943/FJP5200 work out okay, which I also can not see why they wouldn't be okay, I can add them as additional sub's.
For that "PCB milling machine at school" implementation, you do realize that you are going to have to solder the components leads on both sides of the pcb pads to make/complete the connection(s) as the holes are not plated through holes.
If you use MJE15031G also use it complement MJE15030G
FJP1943/FJP5200 should work, just have to check that you can set o/p bias correctly.
If FJP1943/FJP5200 work out okay, which I also can not see why they wouldn't be okay, I can add them as additional sub's.
For that "PCB milling machine at school" implementation, you do realize that you are going to have to solder the components leads on both sides of the pcb pads to make/complete the connection(s) as the holes are not plated through holes.
Just make sure that you use true complementary pairs.
So for a NJW0302G use its suggested complement, mixing them up I do not suggest as a good idea.
NJW0281G (NPN) with a NJW0302G (PNP)
NJW3281G (NPN) with a NJW1302G (PNP)
1oz copper is what is standard. When they plate it up in the factory it usually comes close to 2 oz external. You can always add solder to the traces and beef the current carrying capacity, assuming that the copper is exposed.
So for a NJW0302G use its suggested complement, mixing them up I do not suggest as a good idea.
NJW0281G (NPN) with a NJW0302G (PNP)
NJW3281G (NPN) with a NJW1302G (PNP)
1oz copper is what is standard. When they plate it up in the factory it usually comes close to 2 oz external. You can always add solder to the traces and beef the current carrying capacity, assuming that the copper is exposed.
I should have looked better (confused also) at what you ordered. 2 confusions do not usually make a right.
NJW0302G(PNP) is not a sub for a MJE15033G(PNP)
MJE15033G is in a TO-220 package, it is not in the same package as NJW0302G(TO-3P).
Pin spacing for a TO-220 is 0.1"(2.54mm), pin spacing for a TO-3P is 5.45mm
You jumped the gun and ordered parts before you get a response back. Lessons learned.
NJW0302G(PNP) is not a sub for a MJE15033G(PNP)
MJE15033G is in a TO-220 package, it is not in the same package as NJW0302G(TO-3P).
Pin spacing for a TO-220 is 0.1"(2.54mm), pin spacing for a TO-3P is 5.45mm
You jumped the gun and ordered parts before you get a response back. Lessons learned.
Have you looked at the Mouser project BOM? use the link as indicated on the first page.
Q1: NJW1302G, (NJW0302G)
Bipolar Transistors - BJT 250V,15A, 200W(150W) TO-3P PNP
Q2: MJE15033G,(MJE15031G),[FJP1943],{FJPF1943}
Bipolar Transistors - BJT 8A 250V 50W TO-220 PNP
Q3: MJE15032G, (MJE15030G),[FJP5200],{FJPF5200}
Bipolar Transistors - BJT 8A 250V 50W TO-220 NPN
Q4: NJW3281G, (NJW0281G)
Bipolar Transistors - BJT 250V,15A,200W(150W) TO-3P NPN
Q5: BD139 (Any hfe grade)
Bipolar Transistors - BJT 1.5A 80V 12.5W NPN SOT-32(TO-126)
KSC2690Y will work too
Q1: NJW1302G, (NJW0302G)
Bipolar Transistors - BJT 250V,15A, 200W(150W) TO-3P PNP
Q2: MJE15033G,(MJE15031G),[FJP1943],{FJPF1943}
Bipolar Transistors - BJT 8A 250V 50W TO-220 PNP
Q3: MJE15032G, (MJE15030G),[FJP5200],{FJPF5200}
Bipolar Transistors - BJT 8A 250V 50W TO-220 NPN
Q4: NJW3281G, (NJW0281G)
Bipolar Transistors - BJT 250V,15A,200W(150W) TO-3P NPN
Q5: BD139 (Any hfe grade)
Bipolar Transistors - BJT 1.5A 80V 12.5W NPN SOT-32(TO-126)
KSC2690Y will work too
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fascinating thread. back in school way back, we had 'spice', is that similar to ITSpice or whatever called?
the files that control the milling, what control are they for? I am not versed in that package (my milling experience is with centroid 400 mills on engines and crap....) what do I need to read?
the files that control the milling, what control are they for? I am not versed in that package (my milling experience is with centroid 400 mills on engines and crap....) what do I need to read?
I used the free spice software package from Linear Technology (ltspice) to simulate the design to verify that it would work correctly.
The fabrication files are output from the pcb layout software, which in this case is standard Gerber RS-274X photoplot data and excellon cnc drill data.
That LPKF machine uses this pcb standard data and mills from it.
The fabrication files are output from the pcb layout software, which in this case is standard Gerber RS-274X photoplot data and excellon cnc drill data.
That LPKF machine uses this pcb standard data and mills from it.
HBrown
Active Member
I can confirm the replacement modules will replace the STK-0080 as well. I have successfully installed one in a fisher CA-880. Of course, I'm going to move amplifier board back to original location and use shorter, heavier jumpers to the module- this was just for proof of function. It sounds very good.
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ianmgull
New Member
I'm having a little trouble, I was hoping someone could help with. I'm not getting any sound after installing the replacement. Compared pin voltages to my one good darlington pack and there are two pins that are way off:
Good (stock stk-0050):
Pin 1: -1.2v
Pin 2: -41.8v
Pin 3: -.1v
Pin 8: .1v
Pin 9: 41.5v
Pin 10: 1.3v
Bad:
Pin 1: -40.3v
Pin 2: -42.2v
Pin 3: -.1v
Pin 8: .1v
Pin 9: 42.5v
Pin 10: 40.5v
So it's clear that Pin 1 & Pin 10 are way too high. I check the obvious - solder bridges between Pin 9 & 10 or Pin 1 & 2, but it seems ok. For reference, these are the transistors used:
q1 NJW1302g
q2 MJE15031G
q3 MJE15030G
q4 NJW3281g
q5 BD139
Any help would be greatly appreciated.
Good (stock stk-0050):
Pin 1: -1.2v
Pin 2: -41.8v
Pin 3: -.1v
Pin 8: .1v
Pin 9: 41.5v
Pin 10: 1.3v
Bad:
Pin 1: -40.3v
Pin 2: -42.2v
Pin 3: -.1v
Pin 8: .1v
Pin 9: 42.5v
Pin 10: 40.5v
So it's clear that Pin 1 & Pin 10 are way too high. I check the obvious - solder bridges between Pin 9 & 10 or Pin 1 & 2, but it seems ok. For reference, these are the transistors used:
q1 NJW1302g
q2 MJE15031G
q3 MJE15030G
q4 NJW3281g
q5 BD139
Any help would be greatly appreciated.
klitzy13
New Member
Hi rcs16, I am working on a SX-780 for a friend of mine right now that needs new STK-0050. I am planning on building what you have designed as it seems like one of the best options out there right now. I have a couple of quick questions before I get too crazy...
I like the idea of adding a fuse for extra insurance and I see in the Mouser project BOM you have added some optional fuses. In the post I have quoted above, you mention putting them in the supply lines, you are talking about at pins 2 and 9 correct?
Has anyone made these with the fuses? How did they turn out?
When I look at your Mouser project I don't see the icon that looks like a page with a pencil. I saved the project as my own but it seems to blow away all of the custom fields (customer part #, etc.). I actually have some MJE15033G's on hand so I am not too worried about replacement but was curious to see any other notes and comments you had in there.
Thanks for your help and awesome design!
I like the idea of adding a fuse for extra insurance and I see in the Mouser project BOM you have added some optional fuses. In the post I have quoted above, you mention putting them in the supply lines, you are talking about at pins 2 and 9 correct?
Has anyone made these with the fuses? How did they turn out?
When I look at your Mouser project I don't see the icon that looks like a page with a pencil. I saved the project as my own but it seems to blow away all of the custom fields (customer part #, etc.). I actually have some MJE15033G's on hand so I am not too worried about replacement but was curious to see any other notes and comments you had in there.
Thanks for your help and awesome design!
To bad, I went to the project page, using the link(without being loggd in) and you are correct, it does not show up since it is read only. SiIlly
So the only way to change that is to make it editable. There is an option to allow access
6. By choosing "Full Edit Access" your colleague will be able to edit your project and you will have the ability to view and approve all edits made. If you would like to limit them to only be able to view and order your project but not make any modifications change the permission settings below.
So lets give this a try, PM me your name and email address, so that I can add your name to the list. That way you can try it out to see if you can see the Customer part number notes icons.
I also changed the insulators for the TO-3P devices, need someone to verify that they are the correct ones. The ones for the TO-220 are too small for the TO-3P devices.
Yes, the fuses to replace the wire links are for the supply pins 2,9. I arbitrarily chose 5A fuses without any testing.
Rick
So the only way to change that is to make it editable. There is an option to allow access
6. By choosing "Full Edit Access" your colleague will be able to edit your project and you will have the ability to view and approve all edits made. If you would like to limit them to only be able to view and order your project but not make any modifications change the permission settings below.
So lets give this a try, PM me your name and email address, so that I can add your name to the list. That way you can try it out to see if you can see the Customer part number notes icons.
I also changed the insulators for the TO-3P devices, need someone to verify that they are the correct ones. The ones for the TO-220 are too small for the TO-3P devices.
Yes, the fuses to replace the wire links are for the supply pins 2,9. I arbitrarily chose 5A fuses without any testing.
Rick
Bassblaster
Super Member
Maybe post the new mouser BOM when the new bits check out?
