"I am trying to figure how to enable the effects loops so I can see if that is the issue ...Do I need to actually put pedals there or run a cable b/t send and return ??"
You want to set the switch next to the effects loop return jack to "LOOP IN", you don't need to have anything plugged in (if nothing is plugged in the loop send is connected to the loop return via internal wiring, but the loop tubes are used, with the switch set to hard bypass the extra tubes are bypassed
From the manual:
The EFFECTS LOOP circuitry can be completely removed from the signal path with the HARD BYPASS/LOOP IN mini toggle. This removes all associated loop circuitry and two tubes from the chain and ensures the purest signal path and maximum sonic performance when outboard processing is not being used. The SEND and RETURN jacks incorporate switching elements so that you may use the LOOP IN selection and activate the Front Panel OUTPUT and SOLO controls with nothing connected to the Loop.
NOTE: The Front Panel OUTPUT and SOLO controls are both part of the Loop and therefore active only when the Effects Loop is engaged. They are both part of the Return stage and will remain inactive as long as the loop bypass mini toggle is set to HARD BYPASS.
