EDITION
NOTE: We recommend you refrain from exchanging tubes solely for sound experimentation purposes. Improper use runs the risk of damaging your amp and will not be covered under warranty. Besides, we tested every conceivable tube option and installed the tube types that deliver the best possible performance.
KEEP THE FOLLOWING IN MIND WHEN YOU ARE READY TO REPLACE TUBES:
•We recommend only qualified service personnel replace tubes.
•Before removing the chassis, ensure the mains cord is unplugged from the wall socket! Wait at least 2 minutes for the amp to power down.
•If you are replacing a power amp tube, ensure the repla- cement tube bears identical specs.
•Use only matched pairs of power amp tubes.
•If you install a matched pair of tubes bearing precisely the same specs as the original tubes, the amp does not have to be
HOW CAN YOU EXTEND THE LIFE OF YOUR TUBES?
•Never operate the EDITION TUBE without a proper load (speaker) connected to the output.
Switch the amp off and let the tubes cool down before transport. A quality flight case is a good investment and is only slightly more expensive than a complete set of tubes.
•Proper bias and trim are essential. If you find the tubes need to be replaced too often, consult a qualified technician.
All other EDITION TUBE components do not require maintenance. Use a slightly dampened cloth for all metal parts and the exterior surfaces. Avoid exposure to mechanical shocks, extreme heat, dust and moisture. Ensure the cooling vents are not obstructed during operation.
Here are a few more basic rules that will extend the service life of your amp enormously if you follow them:
-Make sure all peripheral devices and connecting cables are in a state of good repair! - Ensure plenty of air can circulate around the amp’s ventilation slots at all times - your EDITION TUBE’s life depends on it.- Definitely avoid exposure to mechanical shocks and extreme heat, dust and particularly moisture.
-Be very careful about the kind of peripheral devices you connect to your amp and always check out their specs before you plug them in. Never connect speaker cabinets with an impedance (ohm) rating lower than the EDITION TUBE is designed to handle. Under no circumstances should you connect devices with high output signal levels (e.g. power amps) to your amp’s input.
-Be sure the AC power source delivers the current that your amp is designed to handle before you plug it in. When in doubt about the local rating, ask the venue’s sound technician or a stage hand.
-Refrain from DIY repairs! To be on the safe side, you should also have a qualified technician replace internal fuses.
5.0 TROUBLESHOOTING
1) The EDITION TUBE is not getting any power:
•Check the mains cable to see if it is connected properly.
•The mains fuse may be defective. Replace the fuse with another identical fuse. If this fuse also trips, consult your Hughes & Kettner dealer.
2) The EDITION TUBE is connected properly, but no sound is audible.
•One or several GAIN and MASTER controls may be turned all the way down. Dial in a higher setting.
•A short circuit in the speaker signal chain may have tripped an internal fuse, or one of the power tubes is defective. Replace the speaker cable and have a qualified service technician replace the fuse/tube (identical specifications are a must). Please read Section 4.0 on how to replace tubes correctly.
3)The sound is slightly distorted and you cannot get a truly clean tone.
•The input section is being overdriven. Depending on the type of pickups in your guitar, this effect is very pronounced or may not be audible at all. If you don't want this slight distortion (although many players prefer a little dirt in their sound), reduce the volume of your guitar or volume pedal, turn the screws on the frame of your pickups so the distance between the strings and pickups is greater, or try a different combination of pickups.
•If the distortion has an annoying gritty edge to it, there may be some type of fault due to improper use of a sig- nal circuit, for instance a speaker output connected to the EDITION TUBE's input. In this case, consult your Hughes & Kettner dealer.
4)You have connected an FX processor to the SEND jack and the signal is totally distorted, even when you have dialed in a clean sound.
•The LINE OUT signal is overloading the input of the FX processor. Reduce the processor‘s input sensitivity ("INPUT" or "GAIN").
5)You have connected an FX processor to the SEND jack of the EDITION TUBE and the signal's volume level is way too low.
• The FX processor's output level is set incorrectly. Turn it up.
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