Main > Monitor/Video Forum
Wells Gardner D9200 - Horizontal Collapse?
grantspain:
not sure, it would probably be ok if you got the thinnest one. i would still use thermal past with it.
your original mica sheet is knackered, thats what is causing the arcing and it most likely to have been the fault all along
princess prin prin:
You can also use a TO-3PL (22*29*0.12mm with hole). This is cheap if you don't mind waiting:
https://www.ebay.com/itm/324673667376
lilshawn:
typically the silicone pads used for transistors has a fiberglass fabric inner layer to keep the silicone from squeezing out and puncturing when the transistor is screwed down.
they are also only 0.3mm thick.
Rocketeer2001:
Grant, thanks for confirming the old mica should be tossed.
I did some reading and although the thermal pads are easier to use, I couldn't find consistent claims that it would insulate against the higher voltages, or that it was substantially better at thermal conductivity than the mica. Looks like it's a good substitute for computer CPU heatsinks though. Shawn, I did read about the various silicone pads and how some have that fiberglass layer, but I wasn't finding good sources for it. A lot of items just claimed it was a silicone thermal pad, but didn't really mention enough details regarding its properties. We know the mica works and lasts a long time, so I'll just go with that and get the accompanying compound.
Prin, I did stumble across the size compatibility of the TO-3PL, and that same ebay link! I ended up ordering some of those and payed a few bucks more for faster shipping. It's still going to take about a month, so our little adventure here will have to pause for a bit. TO BE CONTINUED...
lilshawn:
typically the cut to fit silicone pads like what you had linked are for filling space between a device and a heatskinking material like the back cover case of a device... where you want to remove excess heat, but not real concerned about how much.
you quite often see them in TV's where the main video processor has a pad that makes it so there is contact with the metal backing of the LCD panel. it sucks out SOME heat...but not a real lot.
you also see them on VRMs and ram chips for video cards to get some heat out to the heatsink.
more of a space filler than anything else.