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

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Tom E
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They arrived yesterday!! All looks good, they survived the journey. Thanks !!!

BlueSwordM
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@Tom E Niiice!

Finally Big 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

Scallywag
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Tom E wrote:

They arrived yesterday!! All looks good, they survived the journey. Thanks !!!


Great news.
808Hi
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Got mine yesterday. Thank you

808Hi

CNCman
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808Hi wrote:
Got mine yesterday. Thank you

.
That is odd…. Hawaii..?
It would appear that Hawaii would be later. Who can understand the mail. LOL
.
Scallywag
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I received my springs today Smile

thefreeman
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I got my envelope too Big Smile , how to differentiate between gen 2 and gen 3 springs though ?

BlueSwordM
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@thefreeman, look at the design.

Gen 2 springs have less coils, and as such, have wider deltas between wires, which makes them have higher conductivity(at the cost of mechanical strength, and still worse than my 3rd gen design in terms of resistance).

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

KawiBoy1428
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Got em.. today!!!!!!!!!!!!!!

KB1428 “Live Life WOT

khas
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Got mine today, better late than never, thanks

CNCman
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Mine arrived today along with the Convoy 4×18a.
I’m not sure about swapping springs in it because they look gold plated stock.
.
Thanks again BlueSwordM for making that happen. You just cannot get enough good parts for modding. Big Smile

BlueSwordM
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No problem.

I’m so happy everyone finally received their springs.

That not only made my anxiety dissapear, but it also means I can start selling springs again.

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

Sunnysunsun
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How does the FB2 bin look to everyone? I’m thinking of getting a DT8 but since Hank ran out of the FA3 bin, I’m worried the 4000k sst-20 DT8 might look a bit green since I don’t expect each emitter to get much over 2.5.

BlueSwordM
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The FD2 looks pretty good overall at low-mid currents, and excellent at high currents, but I’m not sure if it’s available from our usual supplier.

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

Sunnysunsun
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Hank has FD2s at the moment. I believe lumintop is using them or FA3s which I have in my HL3A. I’d be annoyed if I ordered a DT8 only to discover that it’s greener than my HL3A. I wouldn’t be able to stand it and would want to swap the emitters in one of the lights.

BlueSwordM
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So, I just thought about something.

How much demand is there for a 5mm spring? Just wanted to 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

Phantom Aura
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Are the gen 3 springs still available for purchase?

BlueSwordM
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Yes they are still available to purchase.

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

Funtastic
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BlueSwordM wrote:
So, I just thought about something.

How much demand is there for a 5mm spring? Just wanted to know.

Simon (Convoy) mentioned that he doesn’t have a suitable 5mm spring for high current just last week, I suggested these, but the current ones are too big.

I’d be interested in it also. Currently I’m using the large spring in reverse on the Convoy 8A driver for use on a rifle. It would be much better to install a 5mm spring for my customers

Texas Ace Lumen Tube calibrated with maukka lights

New Zealand store – https://www.piercingthedarkness.co.nz (NZ customers only)

YouTube channel – https://www.youtube.com/channel/UCIUWi2vYp4CWrRkOJM70t_w/videos (Demos for my customers, and reviews)

BlueSwordM
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I see. I’m going to note it down, and reopen another GB in a few weeks anyway.

It looks like I could actually use some new Copper alloys which have slightly higher conductivity(still not as high as BeCu C17500, but higher than C17530) with similar mechanical properties and a different plating setup.

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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You could also drop the exotic alloys paradigm, BlueSwordM, and find some good manufacturer willing to go with copper clad steel springs.

Here's some related info at Fisk Alloy (copper clad steel 40), and I also found this Jiangsushy chinese manufacturer of the stuff. So even before going into custom copper clad steel of 50% or higher IACS, this by itself is an upgrade. Thick and short springs also matter, as this considerably reduces the spring's resistance (increases conductance) while maintaining its strenght.

I know there were problems with this first experience of yours in this regard, as the springs you received were really no better than other good high conductivity springs at the usual manufacturers (Convoy). You know what I mean with this, it is a matter of trusting in the right people, which is a matter of the kind of energy you hold in this regard, of what you believe (i.e. mind reprogramming, visualization, and etc.).

Getting a nice set of high IACS, strong copper clad springs should be fairly easy and affordable; even with silver or even gold coating.

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skinny_tie
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BlueSwordM wrote:
So, I just thought about something.

How much demand is there for a 5mm spring? Just wanted to know.

If you produced a batch of 5mm springs I would definitely buy some. I don’t have a specific need right now, but it would be good to know that I had the best 5mm springs on hand for any build. Smile

BlueSwordM
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@Barkuti, that is not actually the case. I did have initial problems when asking and “probing” a lot of manufacturers about the springs themselves, but once I found my current manufacturer, I did not have any of my problems.

They made my springs perfectly to my design requirements, the specifications of the real springs themselves were very close according to my simulations(mine did not take into consideration the contact resistance of the plating itself, and assumed a perfect weld), and thus, I am very happy with the 1st and 3rd Gen springs especially(the 2nd Gen spring designs were certainly not optimal :P).

Besides, I don’t recall Convoy using any BeCu alloy.

Currently, they are using a phosphor bronze alloy, which is good enough for most applications; my own springs are a step up from that, and are competitive with the Emisar BeCu C17500 short springs in regards to conductivity/mm length of wire(still worse, but not by much), with a good size, better mechanical properties, and lower prices(gold plating in small quantities is rather expensive as I’ve said before…).

Overall, I am satisfied with my current generation of springs, but I want MORE obviously from them:
better materials, better plating, better design, more of them, but I am limited by funds.

Still, thank you. I hadn’t even thought about CCS materials. I’ll look into it and perhaps do my usual math/simulations.

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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Thanks for answering, BlueSwordM.

I did a quick conductivity test on one of your springs long ago, injecting a high current over it with my precision power supply and measuring the voltage drop over its opposite ends as best as I could; I also tested one of the springs coming in one of the Convoy SST40 drivers, and couldn't find a significant difference. It was a quick test, and can't say if I did it with a gen2 or gen3 spring.

Your efforts are welcome in any case. Concerning the idea behind copper clad steel, or what I have in my mind, is some ≈70% Innocent IACS, copper clad piano wire Big Smile spring with a decent plating. And of course, springs made with thick and short in lenght wire, for maximum conductivity.

Deleting a just published post causes the forum thread answer notification to fail. Thus, if you need to change your just published post, edit it. Thanks.

Please avoid fully quoting lenghty posts, namely with nested quotes. Trim quotes down to the essential. Helps with neatness and legibility. Thanks.

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Keanu Reeves may need your help. Join his Telegram channel here.

thefreeman
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I did that the other day and I got ~9mΩ for both small and large springs, Intl-outdoor about 4mΩ but they are significantly shorter, which makes sense because their lights don’t accommodate for protected cells, they also put a thin brass button under the spring to prevent the cell from crushing the components on the spring side of the driver.

BlueSwordM
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@thefreeman, that sounds about right taking into account contact resistance.

I’m still not going to go with gold plating as I got a new quote, and the prices are still as expensive as ever, and I don’t want to increase the prices yet again unless I can massively increase the current performance of my 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

thefreeman
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My measurements don’t account for contact resistance, I used a four wires measurement with the voltage probes at the end of the first turn (bottom and top)

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