Orange Amp Field Guide: OTR80


Pics donated by Pedro Lourenšo

Year: 1996-2002?
Model Number:OR80 !!!
Control Panel Layout:Hi/Lo Inputs - F.A.C. - Bass - Treble - Presence - Gain - Master - Echo Send - Echo Return - Pilot Light - Power
Rear Panel Layout:chassis mains connector - Voltage switch - 2 Fuse holders - Standby switch (instead of slave output!)- Impedance switch - 2 Speaker outputs
Cabinet:56 x 26 x 25cm
Speakers/Load:4/8/16 Ohms
Speaker model:N/A
Output:80 Watts
Preamp tubes:1.5 x 12AX7
Power tubes:4 x EL34
Bias:Fixed bias
Rectifier:solid state
Phase Inverter:1/2 x 12AX7
Circuit:Here's the factory OTR schematickindly donated by Pedro Lourenco
Pedro has also drawn the (slightly different)schematic of his OTR80 (2002)
Chassis layout:The pics shown above show that Orange uses a standard type PCB for reissues of all the older models.(although the Hustler 125 probably doesn't fit on the board)
Comments:ATTENTION: apparently the transformers for the 120W versions are also used in the 80W versions. This means that the output impedances of the OT for the 80W are not 4/8/16 Ohms as it says on the back, but they are 8/16/32 Ohms!!!