Question about Crate Music
Are all the tubes lighting up? they should glow like dim light bulbs. If not, replace them with the same model type (12ax7, or EL34 for example).
Often there are two fuses, one to protect the speaker and another to protect everything, it sounds like the latter fuse may be burned out. take it out and take it to radio Shack for exact replacement.
Posted on Oct 16, 2013
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Posted on Jan 02, 2017
Not a fuse. First thing, to check your speaker (amp unplugged, of course), touch the + and - speaker connections to a 9V battery. If you don't hear a pop sound then your speaker is blown. Thus, no output sound. If speaker is OK, then the output IC is your problem.
Posted on Jul 25, 2009
It sounds like a filter capacitor(s) has failed. The electrolytic caps dry out and cease to perform allowing unfiltered power to reach the preamp sections and get amplified.
Being this is tube with high voltages, an experienced person should work on it due to shock danger.
I assume you checked the tubes for shorts as well as emission since a heater to cathode short could cause this as well.
Posted on Sep 30, 2009
Testimonial: "Thanks man. and thanks for the fast response"
The problem is with the amplifier itself. Crackling is usually capacitor related and you will need to have the amp checked over to properly identify the cause.
Some amps are also prone to pick up static from other electrical items which can also cause these problems. I had a crackling issue with an old Crate amp of mine which turned out it was due to being too near a computer/monitor so it is worth eliminating these things as a possible cause before having the amp checked.
Hope this helps. Thanks for using FixYa.
Posted on Oct 28, 2009
Distortion is a very HIGH gain operation and any hum on the input will be amplified many times.
Check your guitar AND input cable for ANY hum at all at high gain settings on the amp WITHOUT the pedal in line to assure that the source is not before the pedal.
ADDITIONAL cause could be a poor power adapter for the pedal or even a bad filter cap in the pedal.
Posted on Nov 03, 2009
Check for bad tube... it HAPPENS that brand new ones fail... USUALLY if they last 50 hours, they will last for the expected life. The bad tube would likely NOT be the main power tubes, as the amp would still run on one cylinder...
Posted on Feb 02, 2010
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