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23.11.2010, 02:16 | 1 |
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Регистрация: 25.06.2010 Последняя активность: 24.06.2015 07:00 Адрес: Polska - Wroclaw
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Rayovac / River Rock / Headstream / Cabela's - K2 headlamp.
Rayovac / River Rock / Headstream / Cabela's - K2 headlamp.
It is well know headlamp branded with many names and with many different prices from 25 do 49$ - Rayovac, River Rock, Headstream, Cabela's.... Choose your favorite Sometimes you have to spend half an hour looking for the same lamp under other name but with the better price. After some time it comes to the old world too - this time branded as a Mactronic HLS-K2SL.
There is also green safety light version, and in some cases they are claiming only 60 lumens output that is more consistent with the reality. Mactronic from the front side : from the rear side : After disassembling a back plate, the lamp shows its guts : The heatsink is small but is a bit bigger than in Petzl’s MYO XP. After unscrewing the heatsink from collimator holder, you can remove the led and driver board from the case easily. Yet it’s genuine (it looks like ;-) Luxeon K2 not some Chinese 5mm high power invention. Two chips glued with epoxy – producer does not like to reveal his secrets. On the other side of the board there is more parts, it looks like the producer left some space for additional resistors . Now, some measurements, I decide to test both typical power supplies alkalines & NiMH’s with Luxeon K2 led, powered from alkalines 4,68V without load Код:
V-in I-In P-In V-led I-led P-led Eff. 4,45V 104mA 0,46W 3,14V 106mA 0,33W 72,35% 4,32V 204mA 0,88W 3,32V 206mA 0,68W 77,71% 3,94V 506mA 1,99W 3,60V 506mA 1,82W 91,37% Код:
V-in I-In P-In V-led I-led P-led Eff. 3,74V 41mA 0,15W 2,95V 41mA 0,12W 80,63% 3,69V 83mA 0,31W 3,10V 82mA 0,25W 82,00% 3,55V 206mA 0,73W 3,40V 204mA 0,69W 94,77% on alkalines 4,63V without load Код:
V-in I-In P-In V-led I-led P-led Eff. 4,40V 129mA 0,57W 3,06V 131mA 0,40W 70,03% 4,27V 255mA 1,09W 3,24V 258mA 0,83W 76,68% 3,84V 621mA 2,38W 3,31V 635mA 2,10W 88,09% Код:
V-in I-In P-In V-led I-led P-led Eff. 3,67V 71mA 0,26W 2,93V 74mA 0,21W 83,39% 3,58V 138mA 0,49W 3,10V 146mA 0,45W 92,36% 3,34V 317mA 1,06W 3,13V 317mA 0,99W 93,46% Now some beamshots : Before and after led replacement LOW MID HIGH Comparison between Myo XP ‘08 and Mactronic HLS-K2SL after mod (it should be called HLS-SSCSL ;-) ). Both headlamps powered from alkalines High/Mid/Low : MOD It wasn’t hard, the only problem was cutting in the heatsink for the K2 emitter - it is hexagon shaped and SSC is round- I have to use a hammer and level it with the rest of the heatsink. Then using AA (or other thermal epoxy) glue the new emitter, center it with the optics, solder wires and voila! Summary: For 25-30$ you can get good quality headlamp that isn’t worse than old MYO XP – you can also say that it is even better because it have K2 on board and rear blinkie. For some people the biggest disadvantage of this lamp will be lack of the wide-angle lens or color filters - others won’t need them. Lamp is well sealed In opposition to MYO XP, every possible joint is sealed with rubber seal : joint of the head with the back plate, cable connection with the head, lens with the head, and battery holder lock. After modd it is working much Belter when powering from NiMH’s than MYO. So, much cheaper and after mod even better than New MYO XP . What a shame that there is no Belt version - there is no problem to replace the power cord and add some external battery pack, but some people don’t like to change too many things in the brand new headlamp ;-). |