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  1. Hi was wondering if there was anyone interested in a bulk charger for np-50 batteries, i still want it to have some time on the set (in action) before i want to sell any. but an idea about what kind of interest can be expected would be nice. for all i know everyone has something similar already. or no one uses that much of these batteries. or well countless reasons why not. But this is my project little about me and my project how, why and some specs and some pictures. Little about me ? Hi, My name is Joppe and live in the Netherlands, i did mostly audio post production in the past and some audio recording on set (not much). But my interest after a while started to drift away again to making stuff with my hands, mostly audio related gear like exotic loudspeaker designs, but some furniture or weird request every once in a while to. I really enjoy problem solving and creating physical stuff, although sometimes i just wished i never started anyhow, i talked to my friends and ex colleagues (sound recordist) regularly and came aware of the fact that there is not actually a affordable bulk charger for NP50's. They all have either Zaxcom or Lectrosonics transmitters and both use NP-50, and you use a hefty amount a day (depending on how many transmitters of course). So i thought i would give it a go, and of course it all spiraled out of control (as usual) and now there are a gazillion prototypes and parts everywhere (mostly in the bin) and there is no way back so......... i introduce ................ The................... NP50 Charger. What else do i need to call it , im not so good with names.(if you got any please do tell) NP50 Charger The NP-50 charger is a hand made slow (overnight) charger bay that will be available in a 6, 12, 18 slot version. It saves some precious space on the road and works all around the world, it works in all power conditions 230/50Hz or 110/60 Hz. (do let me know which is your prefered voltage) The charger is a Constant Current, Constant Voltage charger and will handle your batteries with care.It can charge all batteries simultaneous at a moderate current limited at ~400mA. All batteries are charged in between 3-4.5 hours depending on capacity of the battery. On request i can add some extra spacers to make it more ergonomical but the intention was small form factor so it is not standard. Any wishes ? Just ask !, Thats the beauty of a small company. Features - Charge 6,12 or 18 NP-50's Simultaneous. - Swiss made gold plated spring loaded battery contacts, that wont scratch up the battery contacts and insures lowest resistance possible. - (rather) Small form factor (HxWxL) 5x14,5x20 cm for a 12 slot, add another ~3 cm for 18 slot version. - Internal Industrial oversized power suply from well known brand. - All passive cooling. No fan noise to keep you awake at night. - Custom amount of slots, i stated 6, 12, 18 but if you would like to have a 14 or 8 slot thats fine with me. Power suply specifications Power 75 Watt Input range: 85~264 Vac Certificering: CE Cooling : Passive Protection : Short cicuit Overload Overvoltage Charger specification for each module (2 slots) Max current each module : 800mA-1000mA Charge rate each slot : ~400mA Charge percentage : ~96-97 % increases life of the battery up to 1.1 times Overheat protection : Charger will cycle down charge current if module reaches above 65 degrees Celsius. Normal working temperature at room temperature 6 slot : Max ~44 degrees Celsius Normal working temperature at room temperature 12 slot : Max ~46 degrees Celsius Normal working temperature at room temperature : Max ~48 degrees Celsius Dimensions 6 slots : (HxWxL) 5x14,5x17 cm Dimensions 12 slots : (HxWxL) 5x14,5x20 cm Dimensions 18 slots : (HxWxL) 5x14,5x23 cm
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