Greetings!
I am interested in designing/building a low power class A tube guitar amplifier (maybe a champ clone or something similar) with a VVR circuit inline on the power rail, accomplishing something similar to the design at the following site:
Voltage Scaling in Amplifiers - Power Scaling / VVR | La Révolution Deux
The idea is to drop the supply voltage seen by the amp to make it clip at a quieter volume (I'd like to add individual knobs for each stage that could be adjusted while powered on and playing). I don't want to regulate the output (this would negatively impact the distortion quality); I want to insert a floating adjustable regulator in line with the supply.
I have a bad feeling about having a pot pulled to > 300V and then adjusting it ...
... someone suggested I use a plastic knob ... l feel like this is a major safety hazard.
Does anyone know of a safer way to accomplish the same thing? Or is this safe enough with a properly selected pot?
Thank you very much!
I am interested in designing/building a low power class A tube guitar amplifier (maybe a champ clone or something similar) with a VVR circuit inline on the power rail, accomplishing something similar to the design at the following site:
Voltage Scaling in Amplifiers - Power Scaling / VVR | La Révolution Deux
The idea is to drop the supply voltage seen by the amp to make it clip at a quieter volume (I'd like to add individual knobs for each stage that could be adjusted while powered on and playing). I don't want to regulate the output (this would negatively impact the distortion quality); I want to insert a floating adjustable regulator in line with the supply.
I have a bad feeling about having a pot pulled to > 300V and then adjusting it ...
... someone suggested I use a plastic knob ... l feel like this is a major safety hazard.Does anyone know of a safer way to accomplish the same thing? Or is this safe enough with a properly selected pot?
Thank you very much!
You should read this post from Kevin O'Connor (London Power guy):
http://www.diyaudio.com/forums/instruments-amps/295339-deluxe-reverb-kits-3.html
Post #23
http://www.diyaudio.com/forums/instruments-amps/295339-deluxe-reverb-kits-3.html
Post #23
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