Vintage Fender Vibrochamp tube guitar amp strange chirp in audio JJ tube generating a birdie

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Troubleshoots unwanted audio chirp in Fender Vibrochamp caused by tube choice. Shows diagnostic method linking tube type to oscillation problem.

A 2-minute video from D-lab Electronics: “Vintage Fender Vibrochamp tube guitar amp strange chirp in audio JJ tube generating a birdie”.

Engineering

Video by D-lab Electronics, played through YouTube's embedded player.

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