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Explore the intriguing case of a malfunctioning Dyna ST70 tube amplifier in this 21-minute video from Retro Tech & Electronics. Witness the dramatic failure of a GZ34 rectifier tube, which begins sparking and melting down within seconds of powering on the recently restored amplifier. Delve into the troubleshooting process as the presenter investigates the root cause of this unexpected and dangerous malfunction. Gain insights into the complexities of vintage audio equipment repair and the importance of thorough diagnostics. Discover the surprising reason behind the tube's explosive behavior and learn valuable lessons applicable to restoring and maintaining classic tube amplifiers.
