BLF Interest List: EX3 High Current Beryllium Copper Silver Plated springs and SST-20 FD2 95CRI(NICE UPDATE LAST POST)

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BlueSwordM
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1. No, not optimally. You want 1x large, and 2x small.
2. Same thing.

3. Only 1x large and 1x small on the tail. No need for a driver spring change since it’s already a BeCu spring.
I did do this mod too. I’ll take a picture of it tomorrow. Fits very nicely. Smile
4. Yes, it’ll work.
5. Yes, it’ll work
6. Yes, it’ll work quite well. Smile

My very own high current Beryllium Copper springs Gen 3:
http://budgetlightforum.com/node/67401
Liitokala Aliexpress Stores Battery Fraud: http://budgetlightforum.com/node/60547

BlueSwordM
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I STILL DO NOT HAVE THEM.
THIS IS A PIC FROM THE MANUFACTURER.

My very own high current Beryllium Copper springs Gen 3:
http://budgetlightforum.com/node/67401
Liitokala Aliexpress Stores Battery Fraud: http://budgetlightforum.com/node/60547

SamHaLeKe
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Thank you BlueSwordM, although I'm not sure about 1, 2 and 3 (A6, X6 and GT Mini).

f.e. the outer springs from the A6 and X6 are smaller (7,5mm) than the one on de GT Mini (11mm).

Also your large (outer) springs are 9mm and don't seem to fit on the contact areas provided, which is 8mm maximum for the A6/X6.

For the GT Mini the contact area is even more different as the outer springs are 11mm and resting on the same measure provided thin contact pad (same for the inner spring), the rest is purple print board, so not like the one full contact pad/circle like on the A6/X6...

Counting only on the soldering to make contact with those provided contact pads doesn't seem perfect to me and kind of misses the purpose of your low resistance springs, or do I mistake?

https://www.dropbox.com/s/py0eqeiy8er4d8u/IMG_20190616_143614.jpg?dl=0

https://www.dropbox.com/s/uohyqxbjry8yqoj/IMG_20190616_143724.jpg?dl=0

Can you post some pictures of the mods you've done please?

Beer

 

- SAM -

 

Edit: I could do a spring bypass on all of them but wanted a more clean sollution for my BLF flashlights collection Big Smile

jasontheguitarist
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I’m going to be out of town for a week at the end of this month. I just know it’ll be just my luck that the LEDs will arrive during that week.

zak.wilson
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I’m a little surprised to see the J5 flux bin (the highest I’ve seen for 4000K SST-20s) in combination with the less green FD2 tint bin. Usually, emitters get greener as the flux bin goes up.

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thisnameisvalid
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Ooo, they’ve arrived! Thanks for the update. Looking forward to putting them in my FW3A. Any idea what shipping times we can expect to Europe?

BlueSwordM
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I STILL DO NOT HAVE THE EMITTERS.

THESE ARE ONLY PICS FROM THE MANUFACTURERS.

Sorry for partially getting your hopes up.

My very own high current Beryllium Copper springs Gen 3:
http://budgetlightforum.com/node/67401
Liitokala Aliexpress Stores Battery Fraud: http://budgetlightforum.com/node/60547

thisnameisvalid
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BlueSwordM wrote:
I STILL DO NOT HAVE THE EMITTERS.

THESE ARE ONLY PICS FROM THE MANUFACTURERS.

Sorry for partially getting your hopes up.

No worries. That’s what I get for making an assumption Facepalm

Luckily I put some 5D XP-L HIs in for the time being so I’m happy Big Smile

moderator007
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SamHaLeKe wrote:


Counting only on the soldering to make contact with those provided contact pads doesn’t seem perfect to me and kind of misses the purpose of your low resistance springs, or do I mistake?


You could use a SnPbAg 62/36/2 silver bearing solder for better conductivity.
SamHaLeKe
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moderator007 wrote:
SamHaLeKe wrote:

Counting only on the soldering to make contact with those provided contact pads doesn't seem perfect to me and kind of misses the purpose of your low resistance springs, or do I mistake?

You could use a SnPbAg 62/36/2 silver bearing solder for better conductivity.

Thank you 007, to me that seems a good solution and perhaps a good investment to for future soldering pleasures. Thanks for the tip!

Beer

 

- SAM -

trakcon
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BlueSwordM wrote:

I STILL DO NOT HAVE THEM.
THIS IS A PIC FROM THE MANUFACTURER.

It confirms the tint bin, though! Big Smile

BlueSwordM
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Yep.

The work I did with my dual BeCu springs in my GT Mini tailcap.

My very own high current Beryllium Copper springs Gen 3:
http://budgetlightforum.com/node/67401
Liitokala Aliexpress Stores Battery Fraud: http://budgetlightforum.com/node/60547

Barkuti
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Estimated time for the stuff to be ready? I see the leds are on its way or sort of, the springs not yet…

When should Innocent I pay? My emitters are all at $1.55 each (3500 & 4000K), doesn't it?

 

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jericho0o
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welp missed out on 219Bs (impossible to find now imo) so I’m hoping these sst20s bring me at least within spitting distance Smile

"And God said, 'Let there be light,' and there was light." - Gen. 1:3

BlueSwordM
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@Barkuti, will send you the payments once I receive the LEDs.

@Sam, I took the picture like you wanted. And they fit fine.

My very own high current Beryllium Copper springs Gen 3:
http://budgetlightforum.com/node/67401
Liitokala Aliexpress Stores Battery Fraud: http://budgetlightforum.com/node/60547

Chatika vas Paus
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Is there a chance that we will get springs and LEDs by the end of July?

BlueSwordM
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Yes.

Will order the springs next week.

I personally can’t wait to get them, especially since the improvement is 20-25% over the 2nd gen while having the same good mechanical properties are the 1st gen springs.

My very own high current Beryllium Copper springs Gen 3:
http://budgetlightforum.com/node/67401
Liitokala Aliexpress Stores Battery Fraud: http://budgetlightforum.com/node/60547

Barkuti
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In which way 2nd gen springs have worse mechanical properties versus 1st gen ones? Just the big spring due to some deformation?

 

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BlueSwordM
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Yeah, just the big spring.

See, from the feedback of some members, I decided to remove a coil from the large springs, along with making the top diameter smaller.

While making the top diameter smaller was a good idea for broader compatibility, what I forgot to think about during my calculations was that removing one coil while having a smaller top meant that more force had to be applied for compression, and since removing a coil meant more force per coil was being applied, well…

The spring deformation went from 0,9mm right down to 2,8mm, which was not very good.

The 25% improvement in conductivity was nice, but not worth that large deformation.

So, I took a lot more time on my hands to find a new way to improve the spring, which was hard and time consuming, but lead to these developments:

1. Could change the material to BeCu C17500 45% IACS. Was not going to happen for obvious reasons, being that mechanical properties are quite important.
2. Could change the material to BeCu C17550 60% IACS. However, cost would explode to stratosphere levels.
3. Finally, after a lot of research, and myself getting a new job, I found that electroplating a thick copper layer(20-25um) would result in the same performance boost of 20-25% of the large spring, but while preserving the goal of having good mechanical properties.

And that goal was met, and the improvement is actually even better than I intially predicted, since the conductivity boost of the 3rd Gen springs are applied to both sizes of springs.

TLDR: The 3rd Gen springs are a large overall improvement over all previous generations of springs.

My very own high current Beryllium Copper springs Gen 3:
http://budgetlightforum.com/node/67401
Liitokala Aliexpress Stores Battery Fraud: http://budgetlightforum.com/node/60547

BlueSwordM
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My very own high current Beryllium Copper springs Gen 3:
http://budgetlightforum.com/node/67401
Liitokala Aliexpress Stores Battery Fraud: http://budgetlightforum.com/node/60547

trakcon
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That’s a lot of LEDs.

BlueSwordM
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Yes of course.
Wait until you see how many springs I usually order. Smile

I should start shipping LEDs only orders next week.
I’ll try to do it as quickly as possible, and as well as possible of course.

I have received the SST-20 FD2 LEDs.
Will start shipping them Monday for the LED only orders.

I have also ordered the 3rd Generation BeCu springs.
Anyone interested in getting the 3rd Gen BeCu springs now, post your interest below.

My very own high current Beryllium Copper springs Gen 3:
http://budgetlightforum.com/node/67401
Liitokala Aliexpress Stores Battery Fraud: http://budgetlightforum.com/node/60547

DavidEF
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Hey, BlueSwordM, would you consider making some shorter springs sometime? I was working on a light today, and was thinking of changing the springs to Blue™ springs, but the “small” spring from you was still a good bit taller than the Qlite driver’s stock spring. I was looking at my Astrolux S42 a few days ago, and the tail spring is particularly pitiful looking. But I can’t change it either, because it is very low profile, and I don’t have any springs that will fit in its place. Even a Qlite driver spring is taller.

The Cycle of Goodness: “No one prospers without rendering benefit to others”
- The YKK Philosophy

BlueSwordM
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That is some good advice. Would have to make some smaller springs one day.

However, you may be out of luck with the S42 spring.

Your only option is a bypass, since it’s a press-fit spring, and soldering to aluminium is well, you already know.

My very own high current Beryllium Copper springs Gen 3:
http://budgetlightforum.com/node/67401
Liitokala Aliexpress Stores Battery Fraud: http://budgetlightforum.com/node/60547

DavidEF
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I’m not worried about the press fit of the S42 spring. I would just make a copper round piece and solder a short spring to it – if I had a short spring available.

The Cycle of Goodness: “No one prospers without rendering benefit to others”
- The YKK Philosophy

BlueSwordM
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Huh, do you have a special kind of flux for this?

Because soldering copper to aluminium is still very hard.

Hope you can do this though.

My very own high current Beryllium Copper springs Gen 3:
http://budgetlightforum.com/node/67401
Liitokala Aliexpress Stores Battery Fraud: http://budgetlightforum.com/node/60547

DavidEF
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No, I will make a copper round that I can press fit in place of the spring. The new spring will be soldered to the copper round.

The Cycle of Goodness: “No one prospers without rendering benefit to others”
- The YKK Philosophy

Barkuti
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BlueSwordM wrote:
Huh, do you have a special kind of flux for this?

Because soldering copper to aluminium is still very …

Recently I took a peek at available solder fluxes for steel, as I often solder to batteries. Found this strange and not expensive FNA (ФНА) dubbed flux flasks for sale:

  1. https://www.ebay.com/itm/Flux-FNA-NVR-used-for-soldering-of-aluminum-stainless-steel-nickel-copper/143061322482 from India.
  2. https://www.ebay.com/itm/Solder-Flux-FNA-for-hard-soldering-aluminum-steel-and-nickel-parts-25ml/232663002505 from Romania.
  3. https://www.ebay.com/itm/Solder-Flux-FNA-for-hard-soldering-aluminum-steel-and-nickel-parts-25ml/232663002505 from Latvia.

The compound is claimed to be effective on aluminium.

 

Smile 

Edit.-

That flux called FNA (ФНА) is the same flux I use in batteries (Goot Super soldering flux, HWY-800, etc.) and works well on steel, nickel, and of course copper but I definitively won't say it is good for aluminum.

Thu, 06/20/2019 - 01:06

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DavidEF
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Barkuti, didn’t you already have some experimentation going on with trying to solder to Aluminum a while back? How did that turn out? I can’t remember.

The Cycle of Goodness: “No one prospers without rendering benefit to others”
- The YKK Philosophy

Barkuti
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I got FTKA/ФTKА and F61A/Ф61A fluxes back then, and experimented just a bit. Soldering over aluminum foil could be attained relatively easy. But what I originally had in mind was soldering to a chunk of heatsink and some hollow pill, and that was Facepalm a whole different story. My attempts were mostly unsuccesful. I got some success on the heatsink by pre-heating it in an oil bath inside a frying pan, then soldering over some de-anodized and fluxed part of it. But overall never got really strong joints on the heatsink, I think that had to do with the heatsink alloy. The fluxes emit nasty fumes, and they may be hard on the iron's tip. Due to the overall difficulties I gave up on the matter at that point.

Maybe my bar was very high to start with. Innocent

 

Big Smile 

Thu, 06/20/2019 - 02:29

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