Troubleshooting

MESA 6L6 tubes tested and waiting to meet their matched pair for life

MESA 6L6 tubes tested and waiting to meet their matched pair for life (click to enlarge)

MESA/Boogie Tube Color Codes explained by Randall Smith

FAQ:  “What’s up with the color coding of your power tubes?”

Most of you have heard about the importance of matching tubes to get the best performance from an amplifier.  That’s because most amps use pairs of output tubes running PUSH-PULL for greater power efficiency—splitting the signal into positive and negative halves to be recombined in the output transformer before hitting the speaker. [click to continue…]

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6L6 tubes glowing in a Bass 400+ bass amp

Vacuum tube troubleshooting is both an art and a science and occasionally a necessity. It is also one of the best things tube amplifier operators and fans can familiarize themselves to with optimally maintain and even fix your Mesa amplifier when a tube decides it’s time to fail.  It’s also entirely safe and not at all difficult so if you have little to no experience with the process, there’s no need to worry. [click to continue…]

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Photo of the serial number 005 on an Original Mark I combo that guards Randall Smith's office

Serial Number 005 on an Original Mark I Snakeskin combo that guards Randall Smith’s office at Mesa H.Q. (click to enlarge or for gallery)

If you’ve ever had a hard time finding the serial number on your Boogie, this info will help. Serial number locations have changed on the many different models over the decades but in the last 20 years the location and format has remained fairly consistent.

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Actual fuses spelling out the word fuse

So your amp doesn’t power up, or it sounded great then cut out and you turned around to see the lights out? Most likely the fuse blew…What’s next? [click to continue…]

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