Batteries and the Like

[CAS]

I was just contemplating how to reduce noise etc in a highly sensitive detector circuit and of course power supply noise is a big factor.

Does anyone know if the GPZ 7000/SDC2300 uses a split battery supply? As its a proprietary design and not the standard battery type, it would be easy to use this system and eliminate some regulator noise from the circuit.
I know split battery supplies have been discussed here before but if weight, packaging and recharging are not an issue, would there be an advantage?

[Skippy]

I would assume the 7000 has a significant switch-mode PSU circuit, as the transmit coil is pulsed with a high voltage, maybe 100V. I doubt they would split the pack in any fashion.

[CAS]

With the GPZ700, they talk about "high power opposite polarity fields" but I havent seen them saying they use a HV to coil. If they did the inverter to create the HV at enough current to drive the coil would have to be pretty big and efficient. Plus then there is the noise issue. I dont think it would be viable.

[Skippy]

You really need the opinion of experts on ML's PI machines, like Woody and Detectormods. But there's a thread on here somewhere about fixing a GPX5000 power supply problem, and I think a DC supply of nearly 200V is used to power the coil. It's likely the GPZ has some similarities, but with bipolar pulsing, eg. +200V and -200V supplies.