5V-9V-12V DC Rechargeable CCTV Li-ion battery powering stock SBM1 Line In (5V USB)
Got the exact same spikes on the Grace V3 using all three voltages with microphones. This was the battery that made me search for a non-regulator solution for my V3:
http://taperssection.com/index.php?topic=145088.0My old SLA and "Wally (BPD-8000)" did not produce spikes. Nor does my new LiFePO
4.
Is it audible ?? Certainly not in a live recording. My eyes are telling me that the battery's regulator is adding noise to the analog section. I don't want my battery doing that.
I've since switched the connector on the cord for the V3. I'd need to make an adapter again to replicate the results. It was very visible on the V3.
So back to topic... not all battery solutions are equal. Completely draining you're RC batts is dangerous and shortens their lifespan.
A small Sealed Lead Acid batt is my "budget" fallback. Local BatteryPlus or RC Hobby store could help you out.
TaperBruce
Explicative Affirmative