Changing the Tubes in a Marshall JMP-1 Pre Amp

Описание к видео Changing the Tubes in a Marshall JMP-1 Pre Amp

In this weeks video we're troubleshooting a noisy Marshall JMP1 Pre amp rack unit. The unit was producing a crackling sound and the output was dipping to almost nothing. Looks like its time to swap the vacuum tubes for new ones. So in this video we will demonstrate how to change the tubes and test the new ones. The tubes we used here are JJ 12AX7 ECC83

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