JWCompany Posted March 30, 2006 Report Share Posted March 30, 2006 Hi,I was wondering about this for some time now. I want to record in PCM on a Hi-MD, using my NH700 which only takes AA batteries, and after having experienced the same mains current buzz issue, I won't have another choice but to use batteries.However, I know that PCM recording would take rather a lot of energy, so I wondered which battery specs I should be looking for to record the full 90 minutes, or whatever it is in PCM. At the moment I use a Duracell NiMH, 1.2 V, 2500 mAh.Can anyone give me any recommendations to make sure with a fully charged battery my unit won't die before the ending of my 90 minutes? I would mostly be recording myself during concerts, so getting up every so often to check on it won't be an option unfortunately...Thanks,Johannes. Quote Link to comment Share on other sites More sharing options...
greenmachine Posted March 30, 2006 Report Share Posted March 30, 2006 (edited) A fully charged, conditioned 2500 mAh NiMH should last for up to six (!) 1GB discs when recording in PCM. Even the supplied 700 mAh battery should last for approx. 1.5 discs.Recommendations? Treat your batteries with respect:http://www.batteryuniversity.com/ Edited March 30, 2006 by greenmachine Quote Link to comment Share on other sites More sharing options...
JWCompany Posted March 30, 2006 Author Report Share Posted March 30, 2006 A fully charged, conditioned 2500 mAh NiMH should last for up to six (!) 1GB discs when recording in PCM. Even the supplied 700 mAh battery should last for approx. 1.5 discs.Recommendations? Treat your batteries with respect:http://www.batteryuniversity.com/Really? Bearing in mind that I'd drain the battery a bit more because of using a unit-powered microphone that's great news. I'll probably do a field test anyway, recording something random as long as possible, just to check. Actually, I was pondering whether I should buy one of your battery boxes, to take that strain off it. But I'm afraid 39€ aren't quite my cup of tea for now (altough, maybe the Berlin university DOES pay back some of the fees, and then that'd be different again)... I know, it would give me more dynamic range and all that, but on the other hand I heard that the battery box should be used on the line-in, rather than mic-in resulting in lower recordings. And as I play jazz, more often than not unamplified I'm not quite sure if that actually doesn't do more harm in the end.Johannes. Quote Link to comment Share on other sites More sharing options...
A440 Posted March 30, 2006 Report Share Posted March 30, 2006 You shouldn't have any trouble with a Duracell, and there are also higher-grade Duracells like Max or Ultra. I do like Duracells better than Energizers--they drain more smoothly and don't suddenly shut down. Power to the mic is a very small drain on the battery. A new Duracell still won't run out before the disc is over. As for the battery module, it depends on your mics, but I find no drop in volume with my Microphone Madness module at about 20/30, even if I'm just recording speech. http://www.microphonemadness.com/products/mmcbmminminc.htmBut if you're not having any distortion problems with your recordings as is--no bass or drums?--then stay with what works. Quote Link to comment Share on other sites More sharing options...
greenmachine Posted March 30, 2006 Report Share Posted March 30, 2006 It should make hardly any difference in power consumption if you use the recorder's power for the microphones or power them externally, battery life shouldn't be noticably affected. If you don't get distortion when recording via mic-in, you won't need a battery module or attenuator. Good luck with your recordings. Quote Link to comment Share on other sites More sharing options...
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