SissySIT R.3

[Zen Mod]

50K?

done by tomorrow ...... piece of cake

 

[Monk55]

Slow but sure…love that CCS tower!

 

[Zen Mod]

rotate those heatsinks on BD critters to have longer side up; no danger of making short neither to pcb nor to pins

you can mount it that way on IRF510, bigger back, no danger

you did put mica pads and goop, on BD critters couple?

 

[Monk55]

I was looking at that clearance…reversed sinks…Mica pads & goooop yes!
Mucho gracias senior ZM

 

[jonboylaw]

Coming soon.....

The case is getting there, boards are built but not tested. Taking my time and doing all the fabrication by hand/pillar drill/ files etc.

Shout out to Nautibuoy for the inspiration.

 

[Zen Mod]

 

[Vunce]

Super cool Jonboylaw!!
Those sinks are big enough for a SissySit on Steroids 🤣

 

[jonboylaw]

Those heat sinks are beasts, from solar inverters and priced very reasonably if you are in the UK that is.

https://www.ebay.co.uk/itm/13359685...EI5gsRFQl-&var=&widget_ver=artemis&media=COPY

There may be similar in the US.

 

[Vunce]

I purchased 3 a few years ago in the States for $25 each😉
Then recently another 1 from a UK seller, with shipping 😭 Ouch!

Good luck with your build! Lookin great so far.

 

[e_fortier]

Coming soon.....
View attachment 1139178
View attachment 1139171 View attachment 1139180


The case is getting there, boards are built but not tested. Taking my time and doing all the fabrication by hand/pillar drill/ files etc.

Shout out to Nautibuoy for the inspiration.

Amazing work and considering you did all the ventilations holes by hand you’re very talented.

 

[Monk55]

Those sinks are very cool….the build is cool 👀 & inspiring!
Thanks for the link…I just ordered a couple.

 

[jonboylaw]

Using 6 inch U-channel Alu for mounting the power boards and for the Sissy boards. See Nautibuoy’s build for some pictures of this.

 

[jonboylaw]

I created a template in Powerpoint, with the centres marked for centre punching, then drilled all with a 3.5mm drill bit. After this it was a case of carefully using a Step bit to drill 4mm, 6, 8, 10, 12, 14, 16 and 18mm holes. I glued the template to the plate so I did not have to guess the hole sizes too much.

 

[Zen Mod]

clever to avoid straight lines

!

 

[cubicincher]

I also used those heatsinks in my IXYS-mosfet-monoblocks. They really do a great job transfering a lot of heat away.
Cheers
Dirk

 

[Monk55]

Those heat sinks are beasts, from solar inverters and priced very reasonably if you are in the UK that is.

https://www.ebay.co.uk/itm/13359685...EI5gsRFQl-&var=&widget_ver=artemis&media=COPY

There may be similar in the US.

Wow these are sweet sinks. Thanks for the tip!!

 

[jonboylaw]

Don’t let them fall on the kitty though!

 

[Monk55]

🤣 that’s Prawn my mouser ( named after the movie District 9)
Planning

 

[Zen Mod]

heatsink is big enough that you can mount SIT closest possible to its own pads on pcb

keep both mosfet and SIT at approx. 1/3 of hsink height and that's it

 

[Monk55]

Thanks for the great support ZM. Yes these sinks are big.