Micro Cube Help!!

[MickyM]

Hi everyone, I'm new to the site looks like a great place for info, I'm really impressed. I'd greatly appreciate if someone could explain whats happening to my beloved amp!!

I was just practicing on my micro cube last night for the first time in months because i'm finally ready to take to the streets with my guitar. I have been practicing on a cube 60 untill now. Figured it would be the same deal roughly so didn't want to waste my batteries in the micro cube with practicing.

Anyway, I find when I'm playing on the micro when i have the vol and gain about half way and then add some chorus (or any on board effect) , if i play a chord and let it ring it sounds grand for about 2-3 secs and then it starts crackling and the sound kind of pulses in and out kind of in waves.

I think the sound improves if I plug it in but still not perfect!! This happens a lot less if i don't have an effect on

Is this something wrong with my amp?

Thanks a lot for your help,
Mike

[Enzo]

Well, first things first.  How are the batteries?

[MickyM]

Batteries should be fine but I'll try again with new ones and let yaknow if it helps, but as I said even when it's plugged in the problem is still there although somewhat diminished