【convoy】L6 GT-FC40 high CRI on sale now

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Barkuti
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Well, that's odd cothyhu77. Better then wait until Simon notices all of this and decides to answer himself.

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id30209 wrote:

Simon,


 


Have you checked new M3-C ramping speed?

The driver manufacturer said that the ramping speed was adjusted, but I still think it’s little fast.

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Simon Mao wrote:
id30209 wrote:

Simon,


 


Have you checked new M3-C ramping speed?

The driver manufacturer said that the ramping speed was adjusted, but I still think it’s little fast.


Good news Simon. If also M21C-U will be updated with new driver with fixed ramping?
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What could be the reason for the step down at 3.8V? It’s almost winter right now so I assume Thermal stepdown would be a non issue right?

LTC wrote:
id30209 wrote:

To everyone owns M21C-U, does your light after switching on high in 4mode setting step down from HIgH to moonlight within 10seconds?


 


Caramba just asked me about it if i have this problem he is experiancing and i just checked mine and it does this within 10s when set to MAX.


Weird…

Yes, I noticed this on my M21C-U for 4 mode. This happened on high mode turn off(memory) and turn on again. It also happened for from off, double click to high.
-
I did some testing. This happened when battery is 3.8 volt and below. With a fresh battery, everything is fine.

I’m using P42A and 40T for M21C-U.

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icpart wrote:
Simon Mao wrote:
id30209 wrote:

Simon,

 

Have you checked new M3-C ramping speed?

The driver manufacturer said that the ramping speed was adjusted, but I still think it’s little fast.
Good news Simon. If also M21C-U will be updated with new driver with fixed ramping?

 

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Simon, someone is asking about the driver size in the Convoy S21B. Others would also like to know. This lack of information in the S21B host advertisement is a discouraging nuisance. 

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S21B driver is 22mm. It was described somewhere but i forgot where.

Anyhow, seeing model running CULPM1.TG @8A and looking at Convoy site will tell you that only 22mm is working with 8A. Smaller drivers are 6 and 5A 

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Now with a bit of detective work I’m sure the S21B uses 22mm drivers not 20mm, check these images I pulled from AliExpress:

Customer picture of S21B

22mm SST40 driver

20mm SST40

I still want Simon to confirm compatibility with S21B and the new 22mm 8A driver, though, since for one thing the new driver uses a pin contact instead of a spring and there might be other things I haven’t considered.

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caramba wrote:
Anyone knows the Cut Off Voltage for M21C-U XHP70.2 with the new ramping driver

Does it have Low Voltage “Protection” or just Low Voltage “Warning”

The listing shows

Quote:

Low voltage warning: yes

The flashlight has low voltage protection and temperature control protection.


I think when I reviewed the M21C-U it had actual low voltage protection. To quote myself:
Quote:
There is a low voltage protection present. In the turbo runtime test, protection kicked in around 3.11 volts. For the high mode runtime test, protection kicked in around 2.97 V.

I won’t say the flashlight is perfect but it is one of my favorite flashlights in quite a while. The driver is very efficient and well regulated.

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cothyhu77 wrote:

I still want Simon to confirm compatibility with S21B and the new 22mm 8A driver, though, since for one thing the new driver uses a pin contact instead of a spring and there might be other things I haven't considered.

 

 

Reason for the pin contact in the 8A “buck” (hope it were boost-buck) driver is conductivity, as even high conductivity springs could have problems at 8A or close (with just 10mΩ of resistance a spring dissipates 0.64W as heat when 8A crosses it). Simon and/or the driver manufacturer played it safe this way, but it has drawbacks, namely for people who really need damping or shock absorbing contacts (i.e. hunters for example).

The solution, of course, are really high conductivity springs. A bypassed spring can do, but a durable spring bypass requires careful work, giving the wire a coiled shape. Problem is the contact surface under the pin of the driver, it just has the size of the pin contact and is too small, unnecessarily forcing spring modders to remove the solder mask around it.

Let me also say that, in all honesty, I think 8A is probably a bit over the top. We know the CSLPM1.TG peaked at 8A or just a hair above, and imho it's over the top for it. The wrong thing about this is we don't have any CULPM1.TG tests. So actually we still don't know how much higher is the 4040 CULPM1.TG going to peak over the 3030 CSLPM1.TG. And honestly, it's the same led, only the footprint changes. Nothing else to say, except that being able to configure a driver's output current in firmware would be a godsend. 

P.S.: low voltage cut-off is overall set too high in drivers. Bear in mind that drivers don't see the actual battery voltage, they see it after it goes through springs, contacts and switch. All of this causes voltage drops, the higher the current the larger the drops; therefore, the actual cut-off ends up being at a higher voltage, namely if running in high current modes. In essence, I think driver cut-off voltages should at least drop down to 2.7 or 2.5V. After all, I've yet to see a battery complain about a low cut-off, namely when datasheets specify 2.5V (and I've seen lower).

Fri, 11/20/2020 - 04:55

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gchart wrote:
I think when I reviewed the M21C-U it had actual low voltage protection. To quote myself:
Quote:
There is a low voltage protection present. In the turbo runtime test, protection kicked in around 3.11 volts. For the high mode runtime test, protection kicked in around 2.97 V.

I won’t say the flashlight is perfect but it is one of my favorite flashlights in quite a while. The driver is very efficient and well regulated.

gchart. Thank you for the detailed response.

I also think it is almost a perfect flashlight.

What do you think what could be the reason for these random step downs at 3.8V?

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icpart wrote:
Simon Mao wrote:
id30209 wrote:

Simon,


 


Have you checked new M3-C ramping speed?

The driver manufacturer said that the ramping speed was adjusted, but I still think it’s little fast.


Good news Simon. If also M21C-U will be updated with new driver with fixed ramping?

The driver currently in use is not a new batch of drivers

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cothyhu77 wrote:
Is the S21B compatible with the new 8A buck driver? I’m not interested in the output so much as the additional efficiency.

22mm driver for S21B

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caramba wrote:
gchart wrote:
I think when I reviewed the M21C-U it had actual low voltage protection. To quote myself:
Quote:
There is a low voltage protection present. In the turbo runtime test, protection kicked in around 3.11 volts. For the high mode runtime test, protection kicked in around 2.97 V.

I won’t say the flashlight is perfect but it is one of my favorite flashlights in quite a while. The driver is very efficient and well regulated.

gchart. Thank you for the detailed response.

I also think it is almost a perfect flashlight.

What do you think what could be the reason for these random step downs at 3.8V?

There are the following possibilities for this problem,
1. The internal resistance of the tail spring is too large.
2. The internal resistance of the battery is too large or the voltage drops too fast under high current.
3. Poor contact somewhere.
4. The driver is defective.

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Hi Simon, any update on 3×21700 light? Thank you.

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caramba wrote:
What do you think what could be the reason for these random step downs at 3.8V?

Sorry, I’m not familiar with that. The only stepdown I encountered was when thermal protection kicked in around 4 minutes on turbo.
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Okay, my new finding is the M21C-U is doing fine, in fact very well, after the light has warmed up. It step down from high(100%) to moon about 3.3V. This time I’m using a Vapcell T50, previously on P42A and 40T. Taking into account all factors and voltage sag. It’s about right that it step down about 3.3V on high(100%) to moon.

I will test again with the P42A and 40T. Will also test with Vapcell G50 and Vapcell Red 4500mah(20A) and update here again.

Even before this finding. I love the M21C-U. It’s my most carried light for all my night walks.

caramba wrote:
What could be the reason for the step down at 3.8V? It’s almost winter right now so I assume Thermal stepdown would be a non issue right?
LTC wrote:
id30209 wrote:

To everyone owns M21C-U, does your light after switching on high in 4mode setting step down from HIgH to moonlight within 10seconds?


 


Caramba just asked me about it if i have this problem he is experiancing and i just checked mine and it does this within 10s when set to MAX.


Weird…

Yes, I noticed this on my M21C-U for 4 mode. This happened on high mode turn off(memory) and turn on again. It also happened for from off, double click to high.
-
I did some testing. This happened when battery is 3.8 volt and below. With a fresh battery, everything is fine.

I’m using P42A and 40T for M21C-U.

LTC
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Hi Simon, I can relate your points. I have some findings mentioned prior to this post.

The weird part is the step down happened when the light is cool(below 30 degC-batt below 3.8V) . Again, as above post finding, it’s all fine and good after the light has warmed up.

Anyone care to share if there’s a theory to this effect that I missed?

Simon Mao wrote:
caramba wrote:
gchart wrote:
I think when I reviewed the M21C-U it had actual low voltage protection. To quote myself:
Quote:
There is a low voltage protection present. In the turbo runtime test, protection kicked in around 3.11 volts. For the high mode runtime test, protection kicked in around 2.97 V.

I won’t say the flashlight is perfect but it is one of my favorite flashlights in quite a while. The driver is very efficient and well regulated.

gchart. Thank you for the detailed response.

I also think it is almost a perfect flashlight.

What do you think what could be the reason for these random step downs at 3.8V?

There are the following possibilities for this problem,
1. The internal resistance of the tail spring is too large.
2. The internal resistance of the battery is too large or the voltage drops too fast under high current.
3. Poor contact somewhere.
4. The driver is defective.

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LTC
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Looks like a similar point on all fine after light has warmed up.

id30209 wrote:

There is similar complaint on TLF


https://www.taschenlampen-forum.de/threads/probleme-mit-convoy-m26c.78773/

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Has anyone measured the throw of the Z1 with CSLPM1.TG or compared it to any other lights?

I’ve got one on the way from Simon but I’m not sure if it’s going to throw enough to scratch that itch.

Thanks.

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LTC wrote:
Okay, my new finding is the M21C-U is doing fine, in fact very well, after the light has warmed up. It step down from high(100%) to moon about 3.3V. This time I’m using a Vapcell T50, previously on P42A and 40T. Taking into account all factors and voltage sag. It’s about right that it step down about 3.3V on high(100%) to moon.

That is very interesting, I will try to verify it ans warm up the head to 30C before using,

id30209 wrote:

There is similar complaint on TLF


https://www.taschenlampen-forum.de/threads/probleme-mit-convoy-m26c.78773/

That is also odd, I thoght the M26C has a different driver 12 mode vs Ramping

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Found a new bug on the 17mm 5A 12 group driver. If I keep cycling through the modes, at some stage it won’t light up until another tap of the switch. I swapped out everything and it still happened, tried a second build and same thing happens.

I can’t replicate this with a fully charged cell, only a partially drained one.

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dave1010 wrote:
Has anyone measured the throw of the Z1 with CSLPM1.TG or compared it to any other lights?

I’ve got one on the way from Simon but I’m not sure if it’s going to throw enough to scratch that itch.

Thanks.

I have one installed in a Z1 with the 6A driver, I got approx 950m. Unfortunately I didn’t write the candela down

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Funtastic wrote:
dave1010 wrote:
Has anyone measured the throw of the Z1 with CSLPM1.TG or compared it to any other lights?

I have one installed in a Z1 with the 6A driver, I got approx 950m. Unfortunately I didn’t write the candela down

Thanks, that’s good to know. Looks like Simon’s listing is with a 6A driver too. 950m definitely beats my current furthest thrower (FT03 XHP50.2 @ 735m).

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dave1010 wrote:
Funtastic wrote:
dave1010 wrote:
Has anyone measured the throw of the Z1 with CSLPM1.TG or compared it to any other lights?

I have one installed in a Z1 with the 6A driver, I got approx 950m. Unfortunately I didn’t write the candela down

Thanks, that’s good to know. Looks like Simon’s listing is with a 6A driver too. 950m definitely beats my current furthest thrower (FT03 XHP50.2 @ 735m).

I hope your Z1 doesn’t squeak like all 20pcs of mine. Careful dismantling to add lubricant that you don’t slice the orings. There is one at the rear of the head, make sure it’s in place and screw the head back on very slowly. Quite a few on BLF have sliced it

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)

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Funtastic wrote:
I hope your Z1 doesn’t squeak like all 20pcs of mine. Careful dismantling to add lubricant that you don’t slice the orings. There is one at the rear of the head, make sure it’s in place and screw the head back on very slowly. Quite a few on BLF have sliced it

Yeah, I saw reports of that after I ordered. I’ll report back if I get a squeeky one. Thanks for the tips.

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LTC wrote:
hasddie293 wrote:
Recently checked AE L21A Culpm1, there already had some reviewer, sadly no beamshot. I actually really curious, what is the candela’s amount??hmm

It was stated by Simon with 1190m throw. So by calculation. It’s roughly 350kcd.

I have only see 2 tests so far. 1 is from Funtastic (his own biuld). Another from Chinese reviewer. Both of them get more than 1300m throw.

Will need more reviews and tests from others.

Just tested mine on a fresh charged 40T.
My Lux readings are always on the high side so probably reading at least 10% too high.
I have measured it at 5 m for 19600 Lx which equals 490 kCd (Approx. 1400m)

Taking into account a 10% error still makes it 440 kCd (Approx. 1326 m)

Lumens are measured with my Lumen tube calibrated against a Maukka calibration light, measured 1490 Lm at startup.

The hotspot of the 2mm is almost double the size of the 1mm2, which makes it a great thrower which has far better usability than the 1mm (that is a great laser like beam, but its got a very tiny hotspot.)

My L21A with WF 1mm2 and 5A driver measures 840 Lm and 22500 Lx which equals 562,5 kCd

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Thanks mate… Now on my notes, there are 3 sets of data measured at 1300m ish…

Yokiamy wrote:
LTC wrote:
hasddie293 wrote:
Recently checked AE L21A Culpm1, there already had some reviewer, sadly no beamshot. I actually really curious, what is the candela’s amount??hmm

It was stated by Simon with 1190m throw. So by calculation. It’s roughly 350kcd.

I have only see 2 tests so far. 1 is from Funtastic (his own biuld). Another from Chinese reviewer. Both of them get more than 1300m throw.

Will need more reviews and tests from others.

Just tested mine on a fresh charged 40T.
My Lux readings are always on the high side so probably reading at least 10% too high.
I have measured it at 5 m for 19600 Lx which equals 490 kCd (Approx. 1400m)

Taking into account a 10% error still makes it 440 kCd (Approx. 1326 m)

Lumens are measured with my Lumen tube calibrated against a Maukka calibration light, measured 1490 Lm at startup.

The hotspot of the 2mm is almost double the size of the 1mm2, which makes it a great thrower which has far better usability than the 1mm (that is a great laser like beam, but its got a very tiny hotspot.)

My L21A with WF 1mm2 and 5A driver measures 840 Lm and 22500 Lx which equals 562,5 kCd

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[quote=LTC]Thanks mate… Now on my notes, there are 3 sets of data measured at 1300m ish…[quote]

There’ll never be the same measurement across the board when the led is driven above its rated spec

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)

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