MF01 Mini / MT07- Mod/Upgrade - Copper Heatsink Cover Plate

The copper heatsink arrived yesterday. I applied the isolation stickers and slathered the areas specified in Post 1 with thermal paste - Cooler MasterGel Maker Nano - Cooler Master MasterGel Maker Nano Review | eTeknix The copper heatsink slotted in precisely.

A few hours later, I switched the light onto max ramp. Three minutes later there had been no step-down - still on max ramp - and the copper head of the light was noticeably warm.

Thank you, Paul, for all your work developing a workable solution to this design defect and making it available.

Having built a few hundred personal desktop computers starting in the 90s the thermal paste choices now have never been greater but you should choose carefully for your flashlight ones that have good heat transfer properties and are not electrically conductive.

The best heat transfer is always metal to metal surfaces but metal has minute pores where air resides.Air will also be trapped between uneven surfaces and in tool marks.Air is a poor conductor of heat and needs to be replaced with the heat conductive thermal paste.Use only enough to replace the trapped air and not so much that it flows past the edges of the chips.A small dot in the center of the chip will spread evenly once pressure is applied.On a 7135 chip extremely little is needed.

Some pastes take a few days to cure while others are good to go upon application.

A very good non electrically conductive carbon based paste in the 2019 version of Arctic MX-4 and it's reasonably priced.An application can last for years.

If there is no surface contact between the chip and the heatsink themal paste alone may not be enough and use of copper foil to fill the gap may be needed.

On my PCs I carefully use Thermal Grizzly Conductonaut liquid metal that's 8X better than anything else but it's highly electrically conductive.

1 Thank

Thanks for your feedback and input guys, nice to hear for me and helpful for others :+1:

For all who expressed their interest, I updated the overview list in post #2. I will keep you up to date as soon as there are some news on availability. If there is enough interest I will realize a 3rd batch.

Thank you for your helpful input, some has already been discussed here, I mentioned the Arctic MX-4 in my post # 1 already right from the start, its a good one :+1:

Yes, Arctic MX-4 2019 version worked amazing on mine. :+1:

Hi! Interested in 1, thank You.

The problem here is that the chips are not at a uniform height. They vary due to the reflow process. In order to assure you have no air gaps, you may have to go a bit thicker to assure they all have contact. So add a dot, squish down then lift up and check the spread. If it’s good, then screw down. Every driver is different.

I like the idea of the dot being somewhat tall. The extra height should guarantee contact as opposed to spreading a thin layer over all the chips.

I see no issue if it spreads slightly past the edge of the chip.

1 Thank

I’m interested in buying four. Thank you.

My copper heatsink arrived yesterday. It is great work. :+1: Thank you very much man of light!

Interested :innocent:

For information, I have just updated post # 1 and post # 2, update on current status and interest list.

I just received mine. It looks excellent, very well done. Thanks

Interested

Interested

Can you can add me to the reserve / third batch please.

I got mine thanks very much it is quality piece. The light works much better than it did.:slight_smile:

Thanks for feedback, enjoy your light :+1:
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@gektor, Tiwo85, SWBird, welcome to BLF, thanks for interest, you are on the list.

Interested

Just received my piece today. Very nice! Took 5-10 minutes to install. Fixed! Llght head warms up within 30s and continues to warm but no early step-down. The included stickers are a nice touch. I used Arctic MX-4 compound. This is a very high quality mod that works. Thanks very much man of light.

Hi
I’m interested of buying two…

Out of curiosity, would it be too late for the supplier to increase the batch size of the second batch instead of doing a third batch? Would possibly be better piece price being a larger run.

I was already thinking about it, unfortunately it’s not that easy. The 2nd batch is already manufactured and will be delivered to me mid of this week. I have to think carefully about every order, as it is a certain risk for me and costs arise. That’s why I can’t just order large quantities.
But anyway, I will contact the supplier and ask him whether he got some more material left and is able to deliver a few pcs more. Cause the interest is high and I try to speed up the availability.