if its tip negative, it will disconnect power from the battery and apply inverted voltage to the input, theres a zener in there to offer some protection so you
dont fry everything, but its not a good thing to keep juiced up with incorrect polarity
best regards,
Marcus Wilson
On 25/08/2008, at 6:16 PM, Dennis wrote:
This poly 800 seems to function just fine on batteries but when a 9
vdc converter is plugged in it goes dead. I figured it was the jack
and replaced it after desoldering the original and replacing it with a
clone. Same problem. Any ideas would be greatly appreciated!
Thanks!