500ELX Motor Delay

Hi All-

I just started using my Hasselblad 500ELX for long-ish exposures, and notice that after a "B" exposure of 30+ seconds the motor has a crazy delay before it winds. The sequence is: pre-release, move exposure lever to "T" to trip shutter, wait, move "T" lever back to "O" then...wait for it....wait for it...Motor finally kicks in and advances film/cocks shutter.

Is this normal? Seems odd to me. I'm using 9v battery adapters (with fresh 9v batts) if that makes any difference.

Thanks for any insights!

Hi-

OK I'm game, why shouldn't I be using 9v adapters and is that what's causing my issue?