Posted by Damir [ 213.202.115.96 ] on February 26, 2006 at 12:51:23:
In Reply to: Re: 300B SE Project, Part 7 - Common cathode 6C45Pi triode driver posted by manualblock on February 26, 2006 at 12:11:38:
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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