baturjan Posted December 10, 2009 Report Share Posted December 10, 2009 My B10 started to insert a 1 second scratch/white noise sound rhythmically. I removed the batteries and just tried the 3V power cord and the scratch noise disappeared. The B10 uses 2 AA batteries, but can also run on just one. I use Ni-MH 2000mAh batteries. When I noticed the problem, the batteries showed half on the MD LCD. I recharged the batteries and the problem went away. I only have one Duracell AA right now. I tried with only that in the B10, which showed half full, and the noise was there too. My recording times are daily but only 15 minutes maximum for any single recording. Since I'm using 2 AA batteries in the B10 and record short sessions, I'm not recharging that often. What I don't know is if I'm recording for a couple hours will the noise appear when the battery level drops to half. I'm testing that right now, but I'm only 20 minutes into the recording. I wanted to write this post anyway. Interesting characteristics of the noise: 1) The duration is 1 second 2) The time between the scratches is proportional to the REC MODE (SP 2 = seconds; MONO 4 = seconds; LP2 6 = seconds; LP4 8 = seconds). 3) It is applied to both tracks. For example, using a mono mic and SP recording, I split the tracks on the computer and I could hear the scratch on the unrecorded track in the same location as the recorded track. 4) It apparent the the problem stems from low power and not the mics. I've attached a screen shot of the unrecorded track that was amplified 6000% to see the waveform. I've also attached a 4 second WAV file of the unrecorded track, as is without amplification.scratch.wav Quote Link to comment Share on other sites More sharing options...
baturjan Posted December 10, 2009 Author Report Share Posted December 10, 2009 After 50 minutes and the batter leveling dropping by only the first list triangle, the sound starts to appear although slight. It gets more noticeable 70 minutes into it, though the batter meter hasn't changed. Is there a fix for this? Quote Link to comment Share on other sites More sharing options...
sfbp Posted December 10, 2009 Report Share Posted December 10, 2009 Could it be mechanical? Does it depend on exactly which MD is inserted into the machine? Quote Link to comment Share on other sites More sharing options...
baturjan Posted December 10, 2009 Author Report Share Posted December 10, 2009 Could it be mechanical? Does it depend on exactly which MD is inserted into the machine? No. It's done it on two different discs. Quote Link to comment Share on other sites More sharing options...
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