Sofirn C8F host. 21700 C8F Available

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JasonWW
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cncyana wrote:
- 21700
- dual switch
- aggressive knurling on tube
- no flats on tube to allow for thinner tube
- big deep single emitter reflector
- thick LED mounting shelf for good heatsink
- compatible with stainless convoy bezel
- tailcap with 3 thumb recesses instead of 2
- optional all stainless tailcap
- finned head

Hold on, they are not asking for suggestions for a whole new light. Lol
eas
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Sounds like a regression to the mean, cncyana, with a couple extra large cup-holders thrown in.

There are a fair number of options for single emitter hosts. True, most of those aren’t for 21700 hosts, but at this point, there are more single emitter 21700 hosts than there are three emitter 21700. Besides, what set the C8F apart in the first place was that it was a triple.

.

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Quite frankly, the head could be pretty much left intact except to bore it out where the battery-tube screws into it.

Then, just make the tube ever so slightly wider to fit a 20 or 21, and widen and bore out the tailcap to match. Done. It’ll now take a 20 or 21 instead of an 18.

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I reported Sofirn all the suggestiopns a few weeks ago so now it is only up to them what they coming up with.

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Hi all!
I got a message today from Sofirn. 21700 chosen. That is confirmed. And the driver size will be bigger to make modding easier. They want dual switch but it is not decided yet. Maybe it will be dual switch or switched tailcap can be bought separately. They told me there will be some changes in UI but I don’t know exactly the changes yet.

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Thumbs Up .. Thanks for the update. Smile

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Satan@103TFS
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What about single emitter version will they get 21700 too ?

ZozzV6
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Satan@103TFS wrote:
What about single emitter version will they get 21700 too ?

There is no info about it. I will ask. And also single emitter side switch version.
SKV89
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Dual switch and 21700! Holy cow! Sofirn is on fire!

BlueSwordM
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Yes!

Buying some 21700s now.

My very own high current Beryllium Copper springs: http://budgetlightforum.com/node/64047
Liitokala Aliexpress Stores Battery Fraud: http://budgetlightforum.com/node/60547

JasonWW
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BlueSwordM wrote:
Yes!

Buying some 21700s now.


What do you thing is appropriate, the Samsung 48G which can do 10A continous? Maybe the 40T which should do 20+A continuous?
BlueSwordM
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The 40T would be the best balance between power and capacity, especially in a triple FET like this.

Kind of like a 21700 30Q.

If you want a regulated driver however, the 48G would be your best bet.

And the 30T would be kind of dangerous with low enough resistance contacts at startup.

My very own high current Beryllium Copper springs: http://budgetlightforum.com/node/64047
Liitokala Aliexpress Stores Battery Fraud: http://budgetlightforum.com/node/60547

JasonWW
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BlueSwordM wrote:
The 40T would be the best balance between power and capacity, especially in a triple FET like this.

Kind of like a 21700 30Q.

If you want a regulated driver however, the 48G would be your best bet.

And the 30T would be kind of dangerous with low enough resistance contacts at startup.


You sound undecided.
I thought you just bought some. We’re you just exaggerating? Lol

If not, what did you buy and did you get a decent price?

BlueSwordM
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Since I already have 20700A cells, I’m still undecided whether I should just buy 21700s, or just use it with 20700As. I do not like buying excessive amounts of cells if I already have a bunch of almost new ones.

I didn’t buy it in the end on the Sunway store: https://www.aliexpress.com/store/product/Free-shipping-Original-Sunway-2...

These are based on the Samsung 40T 30A rated cells.

Apparently, they are legit and ship to Canada, but I think I’m just going to stick with using my Sanyo NCR20700A cells, and not buy any 21700s, for now anyway.

My very own high current Beryllium Copper springs: http://budgetlightforum.com/node/64047
Liitokala Aliexpress Stores Battery Fraud: http://budgetlightforum.com/node/60547

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BlueSwordM wrote:
Since I already have 20700A cells, I’m still undecided whether I should just buy 21700s, or just use it with 20700As. I do not like buying excessive amounts of cells if I already have a bunch of almost new ones.

I didn’t buy it in the end on the Sunway store: https://www.aliexpress.com/store/product/Free-shipping-Original-Sunway-2...

These are based on the Samsung 40T 30A rated cells.

Apparently, they are legit and ship to Canada, but I think I’m just going to stick with using my Sanyo NCR20700A cells, and not buy any 21700s, for now anyway.


I would use 20700 for now and wait at least until Sony shows their 21700.
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I just tried a Samsung 30T in a Lucky Sun F3X that has 3 XP-L emitters, tail current was 14.1A.

BlueSwordM
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Oh. That is not so bad after all.

14A is a lot of current after all, and other parts of the light are going to offer higher resistance if the springs are bypassed with thick 18AWG wire.

My very own high current Beryllium Copper springs: http://budgetlightforum.com/node/64047
Liitokala Aliexpress Stores Battery Fraud: http://budgetlightforum.com/node/60547

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That is why I don’t really want double switch. The clicky will add resistance and maybe melting down under those high currents. I know Dale has plenty lights without problems but I had a triple Nichia VG10 with 15A current and it melted the switch completely.

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Cool that they went with the 21700, this will possibly be my first 21700 flashlight, so now I have to find someone who’d ship a 21700 cell to my country Silly

My suggestion for UI: run Andúril!

My plan B suggestion for UI:

  • click from off to turn on at minimum
  • hold from off to turn on at memory (doesn’t memorize moonlight, turbo or blinkies)
  • hold from on to turn off
  • click from on to change modes, modes should be Moonlight >low >medium>high (highest possible with no septdown) > turbo (highest possible, stepdown to high or medium)
  • double click can be shortcut for something
  • blinkies optional

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BlueSwordM
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Persechini wrote:
Cool that they went with the 21700, this will possibly be my first 21700 flashlight, so now I have to find someone who’d ship a 21700 cell to my country Silly

There is the Sunway store link I provided earlier. Apparently, using Turkey Post allows to circumvent easily and legally lithium ion shipping regulations:
https://sunway.aliexpress.com/store/3173029

Also, Banggood ships 18650s everywhere now! I can even order 21700s cells now from Banggood in Canada:
https://www.banggood.com/2PCS-LiitoKala-Lii-40A-21700-4000mah-3_7V-40A-L...

My very own high current Beryllium Copper springs: http://budgetlightforum.com/node/64047
Liitokala Aliexpress Stores Battery Fraud: http://budgetlightforum.com/node/60547

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ZozzV6 wrote:
That is why I don’t really want double switch. The clicky will add resistance and maybe melting down under those high currents. I know Dale has plenty lights without problems but I had a triple Nichia VG10 with 15A current and it melted the switch completely.

Not just that, but any make/break cycle will go melting off little bits of the contact. That’s a danger for any high-current light with a clicky, but moreso if you’re throwing a 21700 at it going full-tilt.

And with each pit that forms, resistance starts sneaking up higher and higher, a teeny tiny little bit at a time.

Something like (Lexel’s?) FET-switch would be a good way to go.

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contactcr
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Not sure if it was mentioned but with this new cell people are going to want to try play around with emitters I imagine. Can you see if they will make a 32mm mcpcb fit without filing? LED4Power has some 32mm 4040 boards coming out and 32mm 5050 options exist too but are hard to find.

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They do sell a 30mm triple MCPCB though made specifically for the C8F:
https://www.aliexpress.com/store/product/C8F-DTP-Copper-MCPCB-30MM-Direc...

My very own high current Beryllium Copper springs: http://budgetlightforum.com/node/64047
Liitokala Aliexpress Stores Battery Fraud: http://budgetlightforum.com/node/60547

contactcr
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BlueSwordM wrote:
They do sell a 30mm triple MCPCB though made specifically for the C8F: https://www.aliexpress.com/store/product/C8F-DTP-Copper-MCPCB-30MM-Direc...

Yes but it already comes with that and it is only one footprint and I have a feeling they are not going to make a custom 30mm board just for modders in other footprints.

BlueSwordM
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Ooh okay.

My very own high current Beryllium Copper springs: http://budgetlightforum.com/node/64047
Liitokala Aliexpress Stores Battery Fraud: http://budgetlightforum.com/node/60547

ZozzV6
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I try ask them to sell more MCPCB types.

SKV89
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What emitters are you guys going to try on this? I’m thinking XP-L2 and 319A seems like the best options.

BlueSwordM
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Samsung LH351Bs 3000k with a regular 3A driver.

Would make for a nice everyday light, especially with a diffuser.

My very own high current Beryllium Copper springs: http://budgetlightforum.com/node/64047
Liitokala Aliexpress Stores Battery Fraud: http://budgetlightforum.com/node/60547

contactcr
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I would like to use Luxeon V since 32mm 4040 mcpcb is in the making. If a good boost driver ever gets to be public I would like to try 3x XHP something.2 but those require new mcpcb also. Part of my reasoning for wanting a more standard pcb size.

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That’s odd Zozz, I have used mini Omten switches easily up over 21A with 4 Nichia 219C’s without a problem. Didn’t melt a mini Omten til I hit 32A. Are you sure you didn’t have a short? That’s about the only way I’ve found to melt an Omten without ridiculous amperage.

I built the first Triple Eagle Eye X6 using a Ledil CUTE-3, several years back now, and have built dozens and dozens of triples and quads. The switch was never an issue.

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