jorgen
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Hi and thanks for replying
Maybe i wasnt clear when i wrote my question. Its not related to when i turn my amp on or off, i have noticed that especially the ZP3 blinks a lot when turned off. The tube blinks when it, the amp, has been running for hours, and the thump-thump-thump sound is heard in the speaker in the same pace as i can see the blinking. If i turn it off, and wait a while before turned back on the symptom is gone. as i wrote, i have changed the VR tube, but a few days later i noticed the same problem, so i have thought maybe its not the VR tube, but maybe something else.. like maybe the rectifier, but i do not know, i have currently changed the rectifier to see if the problem goes away. The thing is that, as stated above, the problem have appeared when amp has been on for many hours..
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