Szemhazai
Enlightened
Petzl MyoBelt / Myo XP 2008 - Vivisection 
Everything that You would like to know, bout they wont tell you in the shop.
One of the biggest outdoor makers finally wake up and put on the market refreshed version of the well known Myo XP / Myobelt XP.
Some marketing crapp :
On the leaflet inside the blister there is some strange issue : in the High mode headlamp on the dedicated 6 cell battery pack 3400mAh should work 50 hours and on the 3 Alkaline Batteries 80 hours !!!
It looks almost the same as the old one, excluding the color, but I think that any flashaholic will recognize SSC P4 emitter.
Inside, it looks the same as the old one…
In old XP's Petzl was grudging and many times they put S-bin Luxeons instead T-bin or better. This time, inside the headlamp is original U-bin SSC P4 star – USXPI, yes they can be a bit more demanding and chose lower Vf version USXPH but this will be good too – I was worrying that they will use T-bin SSC.
Inside almost nothing has changed…
When U use 3 alcaline's from the headlamp package LED will be powered as shown:
Now, lets test powering it up from the NiMh's – it newer was the strong side of this headlamp, but maybe they improve something… 3 slightly used cells – 3,84V without load. In the meantime I switched the star to the USX0H .
As you can see, everything goes as usual, there is not enough voltage to power the LED – so you cant use the headlamp properly.
In that case you need to use 4xAA battery pack :devil: 4 NiMH cells - 5,13V without load.
Let it be the light :twothumbs
SUMMARY
New LED, twice much light as from the earlier version, the same price, 3 year guarantee - one of the best value-for money headlamps on the market today. But it still have one weakness from the older model – it don't have good buck/boost driver.
OLD Myo vs NEW Myo - on High
on Mid
on Low
Everything that You would like to know, bout they wont tell you in the shop.
One of the biggest outdoor makers finally wake up and put on the market refreshed version of the well known Myo XP / Myobelt XP.
Some marketing crapp :
- 200% brighter
- 85 lumens output and nn the BOOST mode even 150 !
- good looking grey-black design
- powered by "AA x 3 (1,2V-1,5V)'
- 3 color battery charge indicator (green->yellow->red)
On the leaflet inside the blister there is some strange issue : in the High mode headlamp on the dedicated 6 cell battery pack 3400mAh should work 50 hours and on the 3 Alkaline Batteries 80 hours !!!
It looks almost the same as the old one, excluding the color, but I think that any flashaholic will recognize SSC P4 emitter
.
Inside, it looks the same as the old one…
In old XP's Petzl was grudging and many times they put S-bin Luxeons instead T-bin or better. This time, inside the headlamp is original U-bin SSC P4 star – USXPI, yes they can be a bit more demanding and chose lower Vf version USXPH but this will be good too – I was worrying that they will use T-bin SSC.
Inside almost nothing has changed…
When U use 3 alcaline's from the headlamp package LED will be powered as shown:
Code:
USXPI USX0H
BOOST 762,1 mA 3,73v 913,1 mA 3,82v
HIGH 269,7 mA 3,25v 299,2 mA 3,06v
MID 157,9 mA 3,12v 170,3 mA 2,94v
LOW 65,4 mA 2,95v 68,3 mA 2,8vNow, lets test powering it up from the NiMh's – it newer was the strong side of this headlamp, but maybe they improve something…
3 slightly used cells – 3,84V without load. In the meantime I switched the star to the USX0H .
Code:
I-led V-led V-in
HIGH 194,0 mA 2,97v 3,77v
MID 111,5 mA 2,87v 3,80v
LOW 44,0 mA 2,75v 3,82vIn that case you need to use 4xAA battery pack :devil: 4 NiMH cells - 5,13V without load.
Code:
I-led V-led I-in V-in Eff
BOSST 714 mA 3,40v 742 mA 3,74V 87,5%
HIGH 415 mA 3,16v 417 mA 4,16v 75,6%
MID 233 mA 3,01v 237 mA 4,57v 64,8%
LOW 90 mA 2,84v 92 mA 4,89v 56,8%SUMMARY
New LED, twice much light as from the earlier version, the same price, 3 year guarantee - one of the best value-for money headlamps on the market today. But it still have one weakness from the older model – it don't have good buck/boost driver.
OLD Myo vs NEW Myo - on High
on Mid
on Low
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