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.
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:
- https://www.ebay.com/itm/Flux-FNA-NVR-used-for-soldering-of-aluminum-stainless-steel-nickel-copper/143061322482 from India.
- https://www.ebay.com/itm/Solder-Flux-FNA-for-hard-soldering-aluminum-steel-and-nickel-parts-25ml/232663002505 from Romania.
- 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.
:-)
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
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.
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. O:)
:-D
Thu, 06/20/2019 - 02:29
I’m in for:
10 SST FD2s
No more sorry, as I said in Post 147.
Only springs are currently available.
After the springs come in I might be in for a portion of whatever leftover you have, going to wait to order though
No problem.
Here are the semi-final specifications:
Large BeCu spring:
Spring upper diameter: 6,50mm
Spring base diameter: 9,0mm
Spring thickness: 1,0mm
Spring height: 12,0mm
Total number of coils: 5
Plating: Copper + silver
Small BeCu spring:
Spring upper diameter: 4,40mm
Spring base diameter: 5,80mm
Spring thickness: 0,8mm
Spring height: 10,5mm
Total number of coils: 5
Plating: Copper + silver
Hi BlueSwordM, could I please get 20 large and 20 small gen 3 springs with my LEDs?
No problem then.
Will add you to the list.
List has been updated:
We are at:
751 large BeCu springs
650 small BeCu springs
Are you still ordering springs this week or are you going to wait for more participants?
Already ordered the springs.
The springs should start being manufactured this Monday.
I think two things are different for this GB:
1. I’ve already sold a lot of springs by now. So, I’ve saturated a large part of the market already probably. I’ve sold over 8000 springs, so, you can guess what happened.
2. Since the springs are quite a bit more expensive now, people are waiting for me to have the springs to take the risk and pledge in a certain amount.
I mean, they are over 50% more expensive than the 1st gen spring. 
I’ve ordered the springs anyway even if we are only 1/2 there to 1500pcs each.
I need to push my skills to the max to prove the worth of these springs.
I also think the enthusiast part of the market has already been filled.
Not everybody can actually solder springs, or wants to.
Unlike LEDs, the improvement isn’t instantaneous, so reflowing new springs vs new LEDs is much less rewarding, even though I think good contacts are still very important.
I’m planning to start light modding services now that I’m experienced enough and have acquired enough materials and supplies now.
Excellent. Thank you for everything.
Sorry guys and gals for the delay, but rather than preparing+shipping multiple orders at once, I decided to prepare every non spring order in one go, and then ship everything in batches.
It makes things easier for me, and way less prone for me to make errors.
So, I’ll start shipping multiple orders this Tuesday, so everything can go as planned as quickly as possible.
No worries. Thanks for the update.
BlueSwordM last Sunday (23rd) you said the springs' manufacturing was due to start right that next Monday, a full week ago in a few hours. Any delays?
By the way, since the table doesn't lists 3500K SST-20s or 2nd generation springs I'll list here my stuff. If there's anything wrong please say so:
10 3rd gen big springs
06 3rd gen small springs
06 2nd gen big springs
04 2nd gen small springs
04 SST-20 4000K FD2
02 SST-20 3500K GA3
16 × gen3 springs: 16 × $0.46 = $7.36
10 × gen2 springs: 10 × $0.39 = $3.90
06 × SST-20 emitters: 6 × $1.55 = $9.30
Shipping and handling: $5
Grand total including a 5% fee namely for PayPal: $25.56 × 1.05 = $26.838 ≈ $26.84
Cheers :-)
There are no delays.
Springs take a long time to manufacture, especially in the quantities I order them in.
These are custom springs, not run of the mill springs.
And now with the multi-layer electroplating, it’s going to be even longer.
LEDs have started shipping.