6
Nagra –
VPA
Installation of the tubes
Step 1 Using the hex screwdriver provided, remove the top rings.
Be careful not to drop a screw inside the amplifier!
Step 2 Insert the 845 tubes
Please use the gloves provided; they are custom made for Nagra using
state of the art “Haute Horlogerie” micro-fiber fabric.
Each VPA has its own set of tubes with a serial number written on the
socket. Each tube is also marked “FRONT” or “REAR” which indicates
the correct location for the tube on the particular amplifier.
This dent must
face the rear of
the unit.
Step 1 Insert the tube, make sure the dent is in the correct position
Step 2 Rotate the tube clockwise, until it clicks.
1
2
