Getting feedback should be the same with single coil or humbuckers - turn up the amp and move closer to it. Gain definitely helps so if you are using any pedals, turn up the gain on it.
Originally Posted by harmonizer
To remove feedback do the opposite.
The reason why feedback occurs is quite simple - resonance. This is the tendancy of a body to vibrate strongly when its natural frequency (or a harmonic of it) is sounded near it.
If the volume is sufficiently high, the string resonates and vibrates strongly. This inturn further increases the volume causing more resonance and so on.
-- My current rig
Guitar: '98 MIJ Ibanez RG520 QS w EMG 81/60
Amp: Laney LC15R Tube, Fernandes 20W SS
Pedals: MI Audio Tube Zone Overdrive, Boss OD3, CS3, MT2, HM2, DS2, CE5, DD7, TU3, Beta Aivin DD2 Delay, Dunlop Crybaby 95Q, Stranger Vol Pedal, BBE SupaCharger
Others: Yamaha RBX 374 Bass, Yamaha MM-6 Synth, M-Audio Fast Track, Shure SM-57, Heet Sound E-Bow Plus
Wanted(pm if selling): EB VPJr/Boss FV500L,Ibanez w Original/Lo-Pro Edge