What is the preferred goop, glue, silicone, rtv used for holding a PCB inside an aluminum mod? Can I use the firewall type RTV?
Preferred goop?
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My preferred goop is air. Any adhesive you might use acts as an insulator and is not good for electronics. Anything that would act as a heat sink would also conduct electricity. Sorry.
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Anything? Not likely.
Most glues, silicones, epoxies and tapes have no conductive materials within them. I do agree that you shouldn't spam a box mod with it because it will restrict heat dispersion from whatever regulator you're using, but adding a bit to simply hold a part in place wouldn't hurt a thing.
I see you are getting to be like that here too.
Although the actual intended application is rather vague, it really sounds like a flat pcb being mounted inside a round tube or an open plan box. Goop sounds like a mess, rather a lot of something. Silicone is mentioned twice, and really sounds like it is being used to fill the space. 'Real' electronics are not designed like this.
The other part could include thermal paste type materials, i.e. Arctic Silver.
To be more specific I want to hold the stand off screws for a pcb to its enclosure without drilling. The enclosure is way longer than the pcb. The enclosure is aluminum. Once again any suggestions.
I am not speaking from experience, but if you are just wanting to bond the standoff's to the box, I think J.B. Weld would do the job. Again, I am not speaking from experience.
Glad it isn't the whole PCB. A good, marine grade 2-part epoxy, or personally I would use epoxy putty.
I'd rather see cone head screws that offer flat, flush heads on the outside of the box, but in the interest of cosmetics you could mount some glue pads to the board that have large cross sections and epoxy the board into the box. The larger the contact area, the stronger the bond. I don't care for a large glob of silicone sealant, either. When you encapsulate electronics into a box, you seal in heat. Why not allow the heat to disperse itself from the components and provide an escape route through vents? Heat in a box with batteries just adds to the thermal load of the batteries. Why not let it all vent ergonomically? Vents in the aluminum box with good mechanical connections to the metal, the heat sinks mechanically mounted to the aluminum, would be good for that.
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What do you use to seal the 510 connector to the enclosure to prevent accidental spills into you mod?
Solder the center pin shut and epoxy putty. Mamu uses this which is stated for plastics but good for metal too: VRS-47809 - VersaChem 47809 Plastic Welding
You can't infer what someone means without directly asking them. If there's any doubt in their intention, try asking. Don't go believing the OP is going to do something that he never mentioned he was going to do and draw wild conclusions in genuine golden-age Batman style. No one in their right mind would use thermal paste meant for CPU heatsink mounting to hold a PCB inside of a mod.
Then again, sometimes I need to remember where I'm posting. last week some kid wanted to drill a hole in his ego to make a vent hole so I suppose nothing is out of bounds.
Personally, I suggest the versachem epoxy that mamu uses. It's non-conductive, viscus and easy to control and get only where you want it without much mess. No one has to coat the entire interior of something to hold a part on, just tack the edges a bit to keep it from moving. I also find that a lot of the time, actually, most of the time, the wires soldered onto the PCB boards hold the parts in place rather well without the need for anything else.
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Looks like I could use that for to mount everything inside the enclosure, and seal the 510 connector.
Good god, you are annoying. Who is asking what here anyway, me or the OP? And twice in this very thread you go for the troll and then agree with something I already said without bringing anything new to the table. Wuck, dude. If I could quote here what Willy told you I most certainly would.
I do not wish to further this conversation, as your emotions seem to have overrun your logic into generic flaming, not to mention that your response in no way helped the OP but rather furthered your obvious egotistical nature.
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