I suppose it got confusing whether people like reverse or forward clicky…
The earlier batches of Convoy M21A (SST40) and Convoy S11 (XHP50.2) used a forward-clicky tailswitch (I still have these 2 models with forward-clicky version).
I have since then tried another Convoy S11 (SST40) and this S11 now uses a reverse-clicky tailswitch. (I could interchange the tailswitch of the other S11 to make one forward-clicky or reverse-clicky type.)
I’d like to change my M21A (SST40) from forward-clicky to reverse-clicky, but am not sure if it’s available (the reverse-clicky tailswitch that fits the M21A).
I suppose I’m more used to using reverse-clicky type tailswitch flashlights.
For multi-mode lights, reverse switch makes more sense. And for 95%+ of people it does as well. I understand why it’s the standard. There is however a distinct market and application for forward switches…
Ideally,a forward “tactical” switch should have a secondary method to change modes. Either with head twists or an e switch that only functions as mode switching.
Convoy used to make the L4, which is a form factor very close to what I desire.
If the grip ring was removed from the tailcap and offered as a removable rubber version, and it had a more ‘proud’ tail switch, then the rest is mostly cosmetic preferences.
On that point, less is more, and I rreaally miss the styling of old eagletac, nitecore, 4sevens, and even fenix (original tk11) tactical lights. Sleek, aggressive, attractive, and functional.
Lastly, if a 32mm - 44mm - 60mm head diameter series with deep, quality reflectors and thin bezels (maximizing reflector area per head diameter — like the C8 and M2 exceed at (m21c not so much)) and taking cues from Amutorch designs that keep overall length in check, we could have a winner in my book.
Problem is, you make the bezel too thin (especially Al and not SS), and any good solid bang can bust the glass and ruin the thread. A thicker bezel, especially made of SS, makes the front end of the light almost a hammer-head in ruggedness.
Even in a padded case, I accidentally dropped my camera maybe 2’ (if that) onto the sidewalk, and the oblique-angle hit just the right way not only shattered the clear (“UV”) protective filter, but also bent the flange enough that I can’t even get off the outer ring from the filter.
Well, so much for padded cases…
In a flashlight, if you want it to be “tactical”, you need to be able to crack open someone’s melon with a good hit. So you don’t also want to bust the front glass and bend the bezel, etc.
There are clearly limits to thinness and the tradeoff with ruggedness. I think the m2 has it right though. I think thinner would be an issue but don’t see much practical advantage going much thicker. If you have to chisel your way out of a jail cell then maybe you have bigger problems anyway. I’m personally not willing to experiment with my sample, but I bet the impact would have to be quite severe to render it inoperable.
SFT is Luminus speak for domeless 4mm², so very likely a minimally modified sst-40 optimized for no dome. Likely additional silicon pour around the perimeter to protect bond wires and such and maybe a slightly different phosphor mix. I’m very, very excited for this emitter. Just heard of it in TLF yesterday. I knew about the SFT70 from this thread, and I think I’m looking forward to that one more. I think it could be the sweet spot for compact high lumen throwers. 1/3 the cost of the 90.2 and in a 5050 footprint that’ll fit existing mcpcbs, reflectors, and gaskets. Win win win. Bring on the next gen boost drivers please!
Would it be possible to get the SFT-40 and SFT-70 datasheet?
Because I found the Design Guidelines for SFT Chipsets Assembly (SFT-10, SFT-16 and SFT-20).
In it, it says that the thermal pad is electrically active, it is common with the cathode.
Just seeing that sbt90.2 on 20mm mcpcb drop in the AX store, Simon you are the King of flashlight modification supplies and straightforward , elegant flashlight design. This is exciting, I have been recently researching what to do for an mcpcb for a sbt90.2, and now I can just order one from you. Amazing. Thank you!
I have a question- I have the yootoo (amutorch) sd3 small 21700 thrower and I’ve done a couple led swaps and now it’s just not working. I think the driver is shot. I pulled out the driver and now I need to replace it. I want to run either an xhp50.2 (3v) in this or perhaps even a sbt90 later at some point (just for fun). So I am thinking I should get a FET or direct drive driver. It is a mechanical tail switch (not sure if it’s forward or reverse). What would be a driver on simons store that would fit this application? As much as a 6amp or 8amp driver is probably better, I want to be able to have open access to turbo in the even I do put that sbt90 in it some day.
I didn’t measure the diameter but it’s 22mm I think. The mcpcb is 20mm.
Here's a fragment of a PM I had with another forum member. Here it is in case someone else can benefit from it:
P.S.: the thermal management stuff also involves most of the newer Convoy drivers, it is linked to the newer 10-pin MCU. If I recall correctly, the negative thermal coefficient (NTC) resistor is connected to pin 8 in the MCU.