| Re: 300B SE Project, Part 7 - Common cathode 6C45Pi triode driver [message #31767 is a reply to message #31766] |
Sun, 26 February 2006 11:51   |
Damir
Messages: 1005
Registered: May 2009
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Illuminati (2nd Degree) |
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Harder without oscilloscope, but there`re some symptoms - in bad cases there`re hum present and unstable work of the circuit. Oscillating tube, for example would "pull" large current. In "moderate" cases, probably "strange" sound - glassy, strange distortion, especially in high frequencies, rustle and dry... When you touch or move some parts/wires, you hear the change in this symptoms/sound. Every wire is antenne, inductance and capacitance, and when you have the gain you have oscillator... It can be a tough problem, depends of the layout...
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