Received a few pieces of SUP70101 this morning and I've swapped a new piece into the suspect channel. Everything back to normal! Thanks again for your help with this, Tombo. 🙏 🙏 🙏
Just wanted to confirm that Tta004 and Ttc004 are substitutes for ksa1381 and ksc3503. Not sure Mouser or Newark are every gonna deliver these 1381's LOL
@codyt
On the second look I've noticed connection points marked as R21-G. 😳 Several coffees do wonders.
I suppose that are connection points for R21 module reference ground wires?
In that case, for the second R21 supply that has role as the negative supply, reference ground wire has to be connected to the actual ground of that module, which is on your schematic marked as V-.
On the second look I've noticed connection points marked as R21-G. 😳 Several coffees do wonders.
I suppose that are connection points for R21 module reference ground wires?
In that case, for the second R21 supply that has role as the negative supply, reference ground wire has to be connected to the actual ground of that module, which is on your schematic marked as V-.
Perfect, thanks Tombo. Those ground references were the part I was unsure of - I should have led with that, sorry 🙂
@Vunce, @tombo56,@codyt,@ItsAllInMyHead
Hi fellas I’m currently building up 4 R21 regulators (2 positive and 2 negative) but I am having a heck of a time finding the Ohmite heatsink referenced in the BOM. Mouser p/n: 588-PA-T21-38E
Any tips for substitutions or where I can find it since it works so well in making the design very compact with Prasi’s LT4320/TO220 CRC PSU?
Of course if you have extra, please pm, I’ll buy them!
Thanks,
Anand.
Hi fellas I’m currently building up 4 R21 regulators (2 positive and 2 negative) but I am having a heck of a time finding the Ohmite heatsink referenced in the BOM. Mouser p/n: 588-PA-T21-38E
Any tips for substitutions or where I can find it since it works so well in making the design very compact with Prasi’s LT4320/TO220 CRC PSU?
Of course if you have extra, please pm, I’ll buy them!
Thanks,
Anand.
I think you can just buy the dual clip and take one clip off and put the remaining one in the middle.
PA-T22-38E
PA-T22-38E
I have a pair I can send you, if that helps. Just PM me your address. I’ve not found substitutes, though the second set I built I mounted them to the chassis heat sinks (probably a slightly uncommon approach, and also the standalone PSU version).
Attachments
Sorry Anand, no extra's in my stash.
I didn't use those sinks after the initial quad of R21's were built.
I didn't use those sinks after the initial quad of R21's were built.
Excellent advice!
Even Mouser has some: https://hr.mouser.com/ProductDetail/Ohmite/PV-T22-38E?qs=gZXFycFWdAOMPpG1BKBMpA==
@poseidonsvoice
Check post #139 for the right R7 value, depending which MOSFET you have for the negative supply.
Does C5 for R21N stay as 33 picofarads or should I change that to 47 pf as well?
Thanks,
Anand.
Thanks,
Anand.
for the SQP120N10-09_GE3 besides changing P7 to 3K3
change ? and C5 – 47 pF (it is not mentioned for Negative regulator)
thanks