OPERATIONAL NOTES
SWITCHING ON
The power switch is located on the back panel. You shouldn't need to turn the Stingray around or get yourself behind it. You should be able to "feel" the rocker switch located next to the AC power cord. Flip the switch away from the power cord to turn on the Stingray or towards the power cord to turn off the unit.
RUNNING
It is not recommended that you leave your Stingray stay permanently switched on. This only wastes electricity and tube life. The Stingray reaches peak operating condition in approximately 30 minutes.
TUBE LIFE
As with all tubes, their quality degrades with age. This is due to decreasing cathode emission, a natural process found in all tubes. We recommend that you have your amplifier checked every
REPLACING A TUBE, INDICATOR LAMP or FUSE. You should read page 14 and 15 for more details if you need more specific info. You may need a small Phillips screwdriver and the correct replacement fuse, tube or lamp. First be sure the unit is off and remove the IEC mains cable. Let it sit for 20 minutes to be sure all power supply capacitors are discharged otherwise one could still get a shock even though the unit is unplugged. Gently wiggle the tube around while pulling it out of the socket. Avoid bending the printed circuit board. Before putting a new tube in, look at it. Check to see that the pins are straight and that they line up to the socket. You should be able to gently push the tube into the socket without excessive force. If it is the indicator lamp that needs replacing, remove the bottom cover. Six screws near the sides hold it in place - when these are removed, the cover should slide off. You will see what looks like a fuse directly behind the black name panel. Gently pry the lamp out and replace it with another lamp and not a fuse. Replace the cover before powering up the unit. The mains fuse is in the IEC power connector
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