oh man I think is too expensive 😕 don't spend that money on that thimios I wish it was like $5.95 USPS but is not 🙁
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Yes agree, it is too expensive.
I will wait to see what you wil test.
Regards.
sadly I only can do a basic audio test like I said I will inform if go or no go 🙂
Vargas
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Greenamp V1.2 Q9 and Q10 need similar ones
oh boy, hello guys can some one recomended me an equivalent for Q9 and Q10 I check Mouser and Digikey and they don't have on stock the KSA1381 🙁 I got all resistor on order and caps but I'm stock with Q9
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oh boy, hello guys can some one recomended me an equivalent for Q9 and Q10 I check Mouser and Digikey and they don't have on stock the KSA1381 🙁 I got all resistor on order and caps but I'm stock with Q9
Vargas
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TTC004B,Q PNP 160V 12pf Cob 120mhz.
TTC004B = NPN 160V
OR , KSA1220A pnp - KSC2690A npn - also these are 160V. Only for 60-65V rails. NO higher. You could run MJE 340/350 , but with reduced performance.
This is why I am running away from through-hole parts.
EDIT - I am converting for all VAS/predrivers (1A devices) to SOT223 ZTX957 pnp / 857 - npn These would work in any of my designs.
OS
TTC004B = NPN 160V
OR , KSA1220A pnp - KSC2690A npn - also these are 160V. Only for 60-65V rails. NO higher. You could run MJE 340/350 , but with reduced performance.
This is why I am running away from through-hole parts.
EDIT - I am converting for all VAS/predrivers (1A devices) to SOT223 ZTX957 pnp / 857 - npn These would work in any of my designs.
OS
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thanks OS for the info, and yes you are right those devices are fading away sadly 🙁 , SMD yes I think I need to update myself to SMD devices too
Vargas
Vargas
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Parameter search at Digikey and it gives you KSA1142OSTU :
https://www.digikey.com/products/en...103&quantity=&ColumnSort=0&page=1&pageSize=25
https://www.digikey.com/products/en...103&quantity=&ColumnSort=0&page=1&pageSize=25
KSA1142 -O = the lower gain group.
Seems its partner , the KSC2682 is obsolete.
Both Mouser and Digikey are out of 300V P - channel fast TO-126's. 😡 MJE340/350 ..... lots of them.
Mouser does have the Toshiba TTC004B/BQ pair.
OS
Seems its partner , the KSC2682 is obsolete.
Both Mouser and Digikey are out of 300V P - channel fast TO-126's. 😡 MJE340/350 ..... lots of them.
Mouser does have the Toshiba TTC004B/BQ pair.
OS
hello OS I was able to order TTC004B and TTA004B and all the rest of the parts just gotta wait for them 🙂Vargas
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TTA004 is the PNP
TTC004 is the NPN.
I am sorry , mouser listed both as TTA's I should of looked right at the datasheets. I need a break. They are at a good price , and a new product. At 160V , they would do most of the forum's VAS's.
OS
TTC004 is the NPN.
I am sorry , mouser listed both as TTA's I should of looked right at the datasheets. I need a break. They are at a good price , and a new product. At 160V , they would do most of the forum's VAS's.
OS
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Never will I have credibility again. I was looking at the
ZTX - same specs.
Yes , FTZ ... I erred.
ZTX - same specs.
Yes , FTZ ... I erred.
OK, I wish someone would give a short course in SMD. The glue/resin used to glue the parts down on the pads and the optimum temp if I use a toaster oven to solder. How long to bake??? I assume boards are reflowed so no additional solder is needed??? Sorry but I'm 71 and my hands aren't steady to hand solder SMD. They are just too small. Also like in a diff amp or a current mirror you can't glue the flat sides of the transistors together as in TO92 to make a matched pair to prevent thermal drift. I guess one could glue a piece of aluminum across to each. Thanks, Ray
Toaster ovens aren't precision instruments, it would take some fiddling around if it worked. I would look on Youtube for various solutions.
The glue is used to hold the smd in place for a wave solder operation. usually in a mix technology design where you have smd on the bottom and THT on the top.
I have done my fair share of smt, I have never had to resort to IR re-flow for my proto's, all done by hand, even DFN/QFN. It does require a steady hand. You do need a hot air station to remove DFN/QFN however.
screen/paste/reflow is geared for bigger runs, production. I call it cookie cutter production. Some people swear by it, everything has its place imo.
I was looking at them yesterday, Diodes Inc makes the DMMT5401/5551 which are perfect, SOT-26 is a smt user friendly package vs a SOT-363 for example.
I have done my fair share of smt, I have never had to resort to IR re-flow for my proto's, all done by hand, even DFN/QFN. It does require a steady hand. You do need a hot air station to remove DFN/QFN however.
screen/paste/reflow is geared for bigger runs, production. I call it cookie cutter production. Some people swear by it, everything has its place imo.
But we have many more options for dual's in smt, which is even better than your method.
I was looking at them yesterday, Diodes Inc makes the DMMT5401/5551 which are perfect, SOT-26 is a smt user friendly package vs a SOT-363 for example.
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I'm 50/50 about SMD sadly I also have gorilla hands and not as steady like used to be I think can be mix both devices SMD and traditional through holes devices I never use SMD devices but I'm willing to learn why not right?
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