Convoy S21A (Short Technical Review)

Rayoui · 2020-11-17T18:00:46.000Z

I have one of the new 8A buck drivers with 12 mode group firmware and I’ve had this happen once as well.

Techno · 2020-11-18T11:53:45.000Z

abgx1:

seems like spring bypass is not very high quality, after short time it just ripped off on all 3 s21a which I had

I guess its because of low quaility insulation on that cable used for bypass, which will become just too stiff(plastic like, instead of rubber…) due to heat damage

anyone can chip in whether there are any safety concerns when the bypass cable snaps?

Nachtfeuerzeug · 2020-11-18T12:53:58.000Z

Techno:

abgx1:

seems like spring bypass is not very high quality, after short time it just ripped off on all 3 s21a which I had I guess its because of low quaility insulation on that cable used for bypass, which will become just too stiff(plastic like, instead of rubber…) due to heat damage

anyone can chip in whether there are any safety concerns when the bypass cable snaps?

Probably not. But, the light can be run at a lower level. I have remade the bypass with a larger wire due to this happening on some of my S21As, too. At first, I was surprised it happened because the stock wire looked ok.

abgx1 · 2020-11-18T16:36:02.000Z

I dont think so, you will just lose few lumens on higher levels

Adrian000 · 2020-12-17T08:11:55.000Z

Terry Oregon:

I measured 21.48mm with my calipers. I use Samsung INR21700-48G which fit just fine.

Is the SST40 of this review the 5000K version ? It seems like by the picture

justanotherguy · 2020-12-29T01:11:39.000Z

Just got mine in, does anyone know of a clip that fits around the light and is captured by the tailcap?

In this style…

Click

Terry_Oregon · 2020-12-29T01:30:16.000Z

Adrian000:

Terry Oregon:

I measured 21.48mm with my calipers. I use Samsung INR21700-48G which fit just fine.

Is the SST40 of this review the 5000K version ? It seems like by the picture

It's the 6500K version

GarethC · 2021-08-24T13:47:37.000Z

The Convoy S21A can be had with either the “4 modes” driver or the “12 groups” driver.
Link:
https://www.aliexpress.com/item/33026858558.html?pdp_ext_f={"sku_id":"10000012685260820","ship_from":""}&gps-id=pcStoreJustForYou&scm=1007.23125.137358.0&scm_id=1007.23125.137358.0&scm-url=1007.23125.137358.0&pvid=fbf2855a-361a-42fb-9ce1-6b7f0d8ee00c&spm=a2g0o.store_pc_home.smartJustForYou_650637087.0

In the “12 groups” driver instruction it is mentioned: “BTW, do not leave the light in config mode for long period of time, because it will wear out the driver’s memory faster.”

Does that mean that Convoy lights with the “4 modes” driver will last longer than those with “12 groups” driver ?

Thank you in advance.

CR888 · 2021-08-24T18:03:45.000Z

Probably best asking in a thread that Convoy owner Simon posts in regularly about the driver ‘wearing out’.

justanotherguy · 2021-08-25T10:07:25.000Z

GarethC:

The Convoy S21A can be had with either the “4 modes” driver or the “12 groups” driver.
Link:
14.08€ 26% OFF|Grau convoy S21A mit luminus sst40, kupfer DTP bord und ar beschichtete innen, Temperatur schutz, 21700 taschenlampe, taschenlampe licht|Taschenlampen| - AliExpress

In the “12 groups” driver instruction it is mentioned: “BTW, do not leave the light in config mode for long period of time, because it will wear out the driver’s memory faster.”

Does that mean that Convoy lights with the “4 modes” driver will last longer than those with “12 groups” driver ?

Thank you in advance.

yes, IF you plan on leaving the light in config mode… !

If you use it like a light and reconfigure it only occasionally I cant see you being able to see any meaningful difference in driver life

Freeriderz · 2021-10-16T22:42:56.000Z

Cheers everyone!
Does anyone know what kind of thread is used in the tailcap to hold the switch in place? For a modification project I need to 3D print a part with the same thread. I’m from Europe so I’m not familiar with threads outside of metric threads. My closest guess would be ANSI 3/4-28 UN right now? Unfortunately, a test printed ANSI 3/4-28 UN created with Fusion 360 did not fit.
Thank you, Jan

Freeriderz · 2021-10-19T14:55:47.000Z

No ideas?

justanotherguy · 2021-10-19T16:48:30.000Z

I almost responded, but the info in my mind was for a emisar light.

I’ll be checking the s21 in a minute here at work

Edit: ok… .743 od on the brass ring. Kind close to 19mm if you ask me.

Also with my old eyes, it appears to be about .75mm pitch

And it’s left handed as well.

Start with that, 19mm x .75 pitch, LH.

I don’t know what’s common for metric, as .7mm pitch is also close

Freeriderz · 2021-10-19T18:15:06.000Z

To my knowledge M19 isn’t a common thread size - so Fusion360 doesn’t have a M19 thread option out of the box - and that’s why I’ve been looking for 3/4” non metric threads instead. But you are right, if (!) it’s a metric thread, it would be M19 x 0,75.

Sidney_Stratton · 2021-10-19T23:23:28.000Z

@ Freeriderz:

I don’t have such with me (S21A) but from justanotherguy if it has .75mm pitch (eyeballing it), I be looking at 3/4” x 32 TPI Left Hand. That’s closer to .75mm than 28 TPI.

BTW, all 24 or 32 TPI are standard on inch stock bar. But a better way to check pitch is against a known screw. Doesn’t matter the size, just if the threads mesh*. OD of threaded part is always some .005 to .008” less than nominal (sometimes much more for sloppy fit).

EDIT: * Oops – Left-hand thread can’t mesh stock screws (right hand). But check if crests line up.

Freeriderz · 2021-10-21T20:51:40.000Z

Thank you Sidney! I’m going to give “3/4” × 32 TPI” a shot! Might have to buy a new and smaller nozzle though. I’ll keep you posted!

Sidney_Stratton · 2021-10-21T21:15:26.000Z

Could check with standard #6, #8, or #10 screw (these are 32TPI) and aligning up the crests. Might need a magnifier to get into the tight spaces.

Geez, my bad. You’re in Germany so those screws wouldn’t be readily available. Perhaps from some US made item, just provisional borrowing.

Addendum:
Don’t mean to be condescent, but a set of screw pitch gages saves the day (Link to Ali Ex). Machinist by trade and had a few surprises with some of the in-house threads – flashlights and other things. Also a digital caliper is essential in measurement (link Ali Ex ).

1stein · 2022-01-04T12:30:34.000Z

Can anybody advise what quad/triple Optics fits into S21A?
Preferably from Carclo or Ledil.

AFAIR there’s 23,2mm glass (or so).

Simon_Mao · 2022-01-04T13:58:13.000Z

1stein:

Can anybody advise what quad/triple Optics fits into S21A?
Preferably from Carclo or Ledil.

AFAIR there’s 23,2mm glass (or so).

S21C with triple lens
S21D with quad lens
they will be available soon

andrx · 2022-01-04T15:15:02.000Z

1stein:

Can anybody advise what quad/triple Optics fits into S21A?
Preferably from Carclo or Ledil.

AFAIR there’s 23,2mm glass (or so).

Kaidomain quad led + optics