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Hi people, Enzo,
I have an AVT-50-60-00 and have collected your schematics for it.
At random, the amp produces a mains hum and equally at random it goes away though sometimes a knock or two seems to coincide with it stopping.
The volume of the hum is directly related to the volume setting but is quite independent of any input being connected.
I have tapped my way through the components without any noticeable effect and, suspecting the valve, replaced it with a new ecc83 to no effect.
Without a scope, it is difficult to guess where it is starting and I wonder if anyone out there has had a similar problem, and if so, I'll hope you'll share your solutions with me
Regards
Chris
I have an AVT-50-60-00 and have collected your schematics for it.
At random, the amp produces a mains hum and equally at random it goes away though sometimes a knock or two seems to coincide with it stopping.
The volume of the hum is directly related to the volume setting but is quite independent of any input being connected.
I have tapped my way through the components without any noticeable effect and, suspecting the valve, replaced it with a new ecc83 to no effect.
Without a scope, it is difficult to guess where it is starting and I wonder if anyone out there has had a similar problem, and if so, I'll hope you'll share your solutions with me
Regards
Chris
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