Introduction

I will show in this Guide how to replace the 12 AX7A Tube in your Tube Art MP easily and without complications.

Loosen the 4 screws sideways the device, using a PH1
  • Loosen the 4 screws sideways the device, using a PH1

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Use the Smart Wrench to loosen the two In- and Output controllers. Attach the Smart Wrench below the controller.
  • Use the Smart Wrench to loosen the two In- and Output controllers. Attach the Smart Wrench below the controller.

  • Be careful not to damage the surface.

  • Now you can lift up the top of the device, and the mainboard appears.

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  • Use the Smart Wrench again to loosen the cinch ports on the backside.

  • Attention! Do not lose the washers located at the in- and outside. Two pieces each.

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  • Use the PH 1 to unscrew 2 screws on the motherboard.

  • Now you can take the board out completely

  • Attention: There are again 2 washers.

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  • Carefully bend the tube up to get a better view

  • Remove the tube with a cloth from the socket, a metal spudger can help

  • Insert the new tube

    • Use cloth so that no residues accumulate on the surface.

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  • Finally just reassemble all parts.

  • Be careful to tighten all the screws and ports, otherwise internal vibrations could cause damage to your device.

  • First put the cinch ports in to get the mainboard back in place.

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Conclusion

Congratulations you did it :)

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Alex Krug

Member since: 12/23/2016

99 Reputation

1 Guide authored

2 Comments

Only replace the fuse? Is that the only part that usually breaks?

Raoul B. - Reply

A tube replacement for this device is not necessarily meant for broken tubes. Most people do it for altering the sound. There is still a modification manual on the web for changing most of the parts like resistors, capacitors and ICs for higher quality.

Holger Klos - Reply

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