How to stop loud hum in "electrified" acoustic?

[SteelBlues]

Hi. I just registered here. I posted on the old board as "SonnyBoy."

I mounted a stratocaster pickup into the soundhole of my acoustic guitar, it works, but the hum is very loud, too loud for the guitar to be of any use.

The pickup hums the same way when it is taken out of the body of the guitar, which means it's not only because of the hollowness.

What can help this?

1) will somehow grounding the strings help? This will take some work so If it won't help, I'm not going to do it.

2) Will putting a pickguard on the soundhole and cover
up the hole around the pickup help with excess feedback? I don't think this will do anything for the hum.

Does anyone have any ideas? I'm worried that the hollowness of the acoustic guitar is just not meant for mounting pickups on, especially stratocaster single coils, which are noisy already.

The hum goes away when I put in a humbucker AND touch any part of the pot or ground wire. If I decide to put in this humbucker and ground the strings, the hum will still be there when I'm not touching the strings. I could live with this if there's not a way to make the single coil work, which is what I really want.

I'd appreciate any advice.

[bam]

The pickup hums the same way when it is taken out of the body of the guitar, which means it's not only because of the hollowness.

I think it's more because the pup itself is defective.

[SteelBlues]

I put in a different Dimarzio pickup and it hums less.

I think the other pickup wasn't defective, it just hums liek that naturally. I realize my strat 57/62 pickups hum just as much.
The whole shielding thing didn't help much.

[bam]

if course it won't, since in acoustics you can't shield the entire cavity.

[SteelBlues]

I meant the shielding didn't work much in my strat. If there was any reduction in hum, it wasn't noticeable.

[bam]

That means that your amp is not properly grounded.
To check that, try connecting the metal case of your amp's electronics directly to Mother Earth or nearby metal plumbing. See if the hum is gone.