12VDC 300mA line adapter with minus at center. Not Switch Mode, so no digital noise.

Notebook Type Switch Mode PSU
Net adapter 100-240 VAC
12VDC, 2.5 A regulated
Jack: 5.5 / 2.5mm
Cable: 1.4m and with ferrite
Supplied without net cable - see accessories

Power supply 24VDC, 500mA
Max. power: 12Watt
1.5meter cable with ferrite core filtering
3.5 / 1.3mm power jack connector.

Switch mode type
90-264 VAC 
12VDC, 7A stabilized 
DC plug: 5.5 / 2.5mm
Cable: 31.5cm and with ferrite

MPV-200BT AT computer power supply
115V Switchable 230V 47-63Hz
200 watts
4 x Molex
1x floppy disk 4 pins
AT plug