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McGizmo Standing wave of Sapphire 25's , GS and now High CRI
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Drywolf
Flashlight Enthusiast
Re: Standing wave of Sapphire 25's + NEW GS
Hi Don,
My light arrived today. Thank you!!
Just wondering if anyone has fooled around with QTC and this light? Specifically, if there is a better way to mount it than just putting a piece between the positive battery terminal and the head.
Thanks,
Frank
🙂
.
Hi Don,
My light arrived today. Thank you!!
Just wondering if anyone has fooled around with QTC and this light? Specifically, if there is a better way to mount it than just putting a piece between the positive battery terminal and the head.
Thanks,
Frank
🙂
.
archimedes
Flashaholic
Re: Standing wave of Sapphire 25's + NEW GS
I've used a QTC in mine (Sapphire 25) - works fine, but seemed more convenient to me to drop it in the base (below the negative terminal).
I've used a QTC in mine (Sapphire 25) - works fine, but seemed more convenient to me to drop it in the base (below the negative terminal).
Probably will last longer down there too as you only get compressive forces and not shear forces (is that the right term?). Smush instead of smush and twist, I guess.
Is Peak selling replacement QTC pills for their lights separately at this point? If you can get one, can they just be dropped down in a light like the Sapphire or are the bodies specially machined to accept them?
Is Peak selling replacement QTC pills for their lights separately at this point? If you can get one, can they just be dropped down in a light like the Sapphire or are the bodies specially machined to accept them?
Drywolf
Flashlight Enthusiast
Re: Standing wave of Sapphire 25's + NEW GS
Kinda wierd. The light would not work with the QTC at the bottom, the head would not screw down far enough. But after playing with the light for a couple of hours the QTC fits fine at the negetive end and it does work much better too.
🙂
NBP,
I bought my QTC from smarkum, 16 little squares for next to nothing.
Kinda wierd. The light would not work with the QTC at the bottom, the head would not screw down far enough. But after playing with the light for a couple of hours the QTC fits fine at the negetive end and it does work much better too.
🙂
NBP,
I bought my QTC from smarkum, 16 little squares for next to nothing.
archimedes
Flashaholic
Re: Standing wave of Sapphire 25's + NEW GS
Yes, they do tend to compress a bit over time - not much, but the tolerances in the Sapphire are tight.
I think Nick is referring to the "pill" that holds the QTC, not the QTC itself, and I do not think that Peak sell them separately (for now, anyway).
Yes, they do tend to compress a bit over time - not much, but the tolerances in the Sapphire are tight.
I think Nick is referring to the "pill" that holds the QTC, not the QTC itself, and I do not think that Peak sell them separately (for now, anyway).
fyrstormer
Banned
Re: Standing wave of Sapphire 25's + NEW GS
The Sapphire 25mA has a constant-current driver. I suspect you'll drive it crazy by inserting a resistor in the path of its power supply.
The Sapphire 25mA has a constant-current driver. I suspect you'll drive it crazy by inserting a resistor in the path of its power supply.
Re: Standing wave of Sapphire 25's + NEW GS
Don't put it at the front end as it could conceivably make contact with the LED leads or even ground for some shorting out or other problems. It will work in the bottom of the battery pak but I think you will find the O-ring doesn't get covered completely when you have the light "off". You could remove the silver ring anode contact from the PCB which would give you some more "Z" room and allow the head to tighten down further.
Drywolf
Flashlight Enthusiast
Re: Standing wave of Sapphire 25's + NEW GS
I know this does not make sense, but it would not work on the negetive side. I think it had to do with the light and not the QTC compressing. Maybe there was something down there that worked it way out? Anyway after playing with it the QTC fits at the botom nicely and works great.
:duh2:
This little light just feels great in my fingers. Another great light Don!!
I know this does not make sense, but it would not work on the negetive side. I think it had to do with the light and not the QTC compressing. Maybe there was something down there that worked it way out? Anyway after playing with it the QTC fits at the botom nicely and works great.
:duh2:
This little light just feels great in my fingers. Another great light Don!!
fyrstormer
Banned
Re: Standing wave of Sapphire 25's + NEW GS
The positive terminal on the battery (and the silver bead on the back of the driver board) focus the pressure on the very center of the QTC material, so the same amount of twisting force equals greater pressure on the center of the QTC material. That makes it easy to compress one part of the QTC material enough to make it conduct electricity. When you put the QTC material at the negative terminal on the battery, there is no such mechanism to amplify your twisting force.
Contact with the LED leads could be problematic, but it can also be easily fixed by coating the back of the driver board with clear nail polish.
I re-iterate my earlier point: the driver in the Sapphire 25 is designed to self-adjust for the battery's power output so it can send 25mA to the LED at all times. When you introduce a resistor into the input side of the circuit, you accomplish little more than making the driver's job harder. It would be better to add QTC material to an old, non-regulated Sapphire -- or a Ti Arc AAA.
The positive terminal on the battery (and the silver bead on the back of the driver board) focus the pressure on the very center of the QTC material, so the same amount of twisting force equals greater pressure on the center of the QTC material. That makes it easy to compress one part of the QTC material enough to make it conduct electricity. When you put the QTC material at the negative terminal on the battery, there is no such mechanism to amplify your twisting force.
Contact with the LED leads could be problematic, but it can also be easily fixed by coating the back of the driver board with clear nail polish.
I re-iterate my earlier point: the driver in the Sapphire 25 is designed to self-adjust for the battery's power output so it can send 25mA to the LED at all times. When you introduce a resistor into the input side of the circuit, you accomplish little more than making the driver's job harder. It would be better to add QTC material to an old, non-regulated Sapphire -- or a Ti Arc AAA.
Re: Standing wave of Sapphire 25's + NEW GS
I have these 2 lights, I'll try and get a comparison shot tonight.
I have these 2 lights, I'll try and get a comparison shot tonight.
Re: Standing wave of Sapphire 25's + NEW GS
Thanks! Most appreciated! I just need a comparison of the lowest output of the ReVO. No need for medium and high. I just want to know what kind of output the Sapphire GS has and the beam profile compared to ReVO.
Thanks! Most appreciated! I just need a comparison of the lowest output of the ReVO. No need for medium and high. I just want to know what kind of output the Sapphire GS has and the beam profile compared to ReVO.
Re: Standing wave of Sapphire 25's + NEW GS
Sapphire GS:
4Sevens Preon Revo SS (S2 led) on LOW:
Both with fresh Eneloops.
For completeness sake,
4Sevens Preon Revo SS (S2 led) on MEDIUM:
4Sevens Preon Revo SS (S2 led) on HIGH:
In a dark environment the Sapphire is brighter than you'd expect! I find the beam and tint perfect to read by as well.
The photos were taken from ~2m from the wall (I was standing at the end of a bed and shining them at the wall, which is a grey colour and fairly accurately represented by the Sapphire photo).
I hope this helps, I've replaced the Revo on my keychain with the Sapphire GS, for what it's worth.
Cheers, Matt.
Sapphire GS:
4Sevens Preon Revo SS (S2 led) on LOW:
Both with fresh Eneloops.
For completeness sake,
4Sevens Preon Revo SS (S2 led) on MEDIUM:
4Sevens Preon Revo SS (S2 led) on HIGH:
In a dark environment the Sapphire is brighter than you'd expect! I find the beam and tint perfect to read by as well.
The photos were taken from ~2m from the wall (I was standing at the end of a bed and shining them at the wall, which is a grey colour and fairly accurately represented by the Sapphire photo).
I hope this helps, I've replaced the Revo on my keychain with the Sapphire GS, for what it's worth.
Cheers, Matt.
Last edited:
Re: Standing wave of Sapphire 25's + NEW GS
Thanks mattp for taking the trouble to do this. The beam looks good and smooth. I think this is the perfect low light that I would need. I can't imagine how long it would take me to deplete an Energizer lithium L92 battery in there.
Thanks mattp for taking the trouble to do this. The beam looks good and smooth. I think this is the perfect low light that I would need. I can't imagine how long it would take me to deplete an Energizer lithium L92 battery in there.
Re: Standing wave of Sapphire 25's + NEW GS
Hey bro,
I thought your 4th would be a makai! :devil:
Hey bro,
I thought your 4th would be a makai! :devil:
Re: Standing wave of Sapphire 25's + NEW GS
Maybe, maybe not. I am not sure. Anyway, Don is out of the 2 X 123 McClicky Paks so it won't be so soon for me to get a Makai.
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