Hi - I ran a multimeter in series with a standard 9V wall-wart from Source Audio, rated at "400mA" and a cold Neptunium hit 630mA when initially connected - then dropped to a steady 380mA a couple of seconds later. So it's not a fault with my 500mA Zeus Jnr as such - it's just that it appears to have a very strict 500mA limiter built into it.
Currently, the pedal takes about 5 seconds to stabilize while the supply switches on and off about once a second. Once it's stable - it stays stable and works perfectly.
But with this quick recycling, is there a risk of premature wear/damage to the pedal circuit, the tube, or the power supply? If there is, I'll look to upgrade the supply to something like a Cioks in the longer term.
Thanks,
Steve