Yes I did, and it's no problem. You can see the orientation on the solder mask layout (if you put your big boy glasses on 😉 )
Sorry to hear that, @spoiler. I know much of what you are going through. Sounds like you have a good approach - do as much as you can while you can.
Have you got some good quality magnifying visors? They really help.
I built 2 SMD P3s and they were no fun, even with a hot plate and paste solder, and despite prior experience. The parts are so small you have to use the visors continually, which gives you tunnel vision. The 2SK170s will be easy and work great.
Have you got some good quality magnifying visors? They really help.
I built 2 SMD P3s and they were no fun, even with a hot plate and paste solder, and despite prior experience. The parts are so small you have to use the visors continually, which gives you tunnel vision. The 2SK170s will be easy and work great.
@spoiler
You can absolutely use the K170s, but as the Idss of them is almost certainly more than the included K209s, the 10R source resistors should be increased to 22R. Aside that it’s going to work beautifully.
You can also omit the teeny SMD capacitors with no degradation in performance, there is plenty of local decoupling without them.
You can absolutely use the K170s, but as the Idss of them is almost certainly more than the included K209s, the 10R source resistors should be increased to 22R. Aside that it’s going to work beautifully.
You can also omit the teeny SMD capacitors with no degradation in performance, there is plenty of local decoupling without them.
Actually, I can't really see. I have extremely limited vision, like a small tunnel.
I just got my hands on an cell culture microscope (low mag) they were tossing at work, I must say soldering smd is incredibly satisfying using that.
I use small strip of mask tape to hold the thing down on one side until one terminal is attached.
I would not dare do that with magnifying lens or glasses.
I use small strip of mask tape to hold the thing down on one side until one terminal is attached.
I would not dare do that with magnifying lens or glasses.
I tried a pair of the glasses with a nifty built-in led spotlight and interchangeable lenses that go to 3.5x. They help a bit, but they're also a bit disorienting (and I'm already disoriented! LOL). Glad to read that the 2SK170s will work well! I may give this a shot after I have an eggnog or two.
Serendipity!!!
I was just looking at a magnifier light to buy. Is this one adequate?
https://www.leevalley.com/en-ca/sho.../76037-led-magnifying-bench-lamp?item=17J3030
(my problem is floaters, the result of detached vitreous humors... lovely patterns of black shapes dancing across my field of vision)
I was just looking at a magnifier light to buy. Is this one adequate?
https://www.leevalley.com/en-ca/sho.../76037-led-magnifying-bench-lamp?item=17J3030
(my problem is floaters, the result of detached vitreous humors... lovely patterns of black shapes dancing across my field of vision)
Thanks Jim!! I think I have a few 22R around here somewhere as well. If not, that's an easy order from Mouser. ANy guidance for orientation? I need to feel the flat side of the 2SK170s cuz I can't really see it well. If the flat side is on the left, woukd the two outer legs go back to the right? Or is that backwards?
Re: SMD caps, I actually got those in before I got sick. Come to think of it, maybe it's those little buggers that made me sick! Thanks for the incredible help you have been on so many awesome projects. If I had 1/8 your skill and 1/16 your patience, I'd be a better person.
I think I just found a couple of the SMDs. They're now stuck to the bottom of my left foot.
Re: SMD caps, I actually got those in before I got sick. Come to think of it, maybe it's those little buggers that made me sick! Thanks for the incredible help you have been on so many awesome projects. If I had 1/8 your skill and 1/16 your patience, I'd be a better person.
I think I just found a couple of the SMDs. They're now stuck to the bottom of my left foot.
Ha! To me, that thing looks like an open toilet seat on a swing arm. With the way I'm going, I may need one of those too!!!!
Seriously, I may order one today.
As I was looking (sic) at the boards, I noticed the 3 holes in a row between where the SMDs go. What are those for? is this the dumbest question ever?
This is what l use for smd (and masking tape to grab the part). The mag lens would not work for me. I use reading glasses for the resistors and reg components.
Nice.
I find taping down a bit difficult for me compared to holding down with curved fine-tip tweezers, or even a wood chopstick.
And probably goes without saying, @spoiler, but paste flux is your friend. Also, apply solder to one pad only first, then tack part, then solder other pad(s).
I find taping down a bit difficult for me compared to holding down with curved fine-tip tweezers, or even a wood chopstick.
And probably goes without saying, @spoiler, but paste flux is your friend. Also, apply solder to one pad only first, then tack part, then solder other pad(s).
I got the shakes, so holding it straight for any length of time is out for me. I tape it with a thin strip, I leave the lead I want to do first exposed, once that is soldered, I can rip the tape off, come back and finish all the other leads with ease.