Tube Amp Bias - Default vs MinTHD and Bode plot on the Line 6 Spider Valve 112 (#003)
2 years ago
116
Repair
troubleshooting
electronics
music
tube amp
tube amp bias
biasing an amp
Bogner
Line 6
Line 6 Spider 112
Spider 112
An experiment in biasing a tube amp.
Comparing 2 methods:
1. The recommended default bias of 35mV (=35mA)
2. Biasing for minimum % THD at 1kHz.
Additionally showing the amplitude vs frequency response of both methods.
Finally and audio comparison of the 2 bias methods.
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