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I have been using a Powertech 12V/4 amp switchmode power supply (MP-3240) for a couple of years now and it has performed flawlessly. It powered my 10" LX200 GPS, EQ6 and HEQ5 mounts with ease.
I also bought a Celestron Powertank17 at the SPSP three years ago and it hasn't missed a beat. It also ran the mounts mentioned. You know when the voltage drops on the Powertank because the LX200 starts to do silly things and the red LED on the EQ6/HEQ5 mounts start to blink when slewing. I know the Powertank wasn't cheap but it has been used to light up my house in a few blackouts, listen to the radio at the same time and use the siren to scare off the possums. The red light is too bright for star parties but a bit of red cellophane placed over it seems to work well.
Cheers,
Steve B
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