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Vintage threads from the first ten years

Q about A Hotbox

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3/31/2000 6:36 AM
Lars	Q about A Hotbox I have built a Hotbox after a schematic I found at   http://www.techaccessinc.com/blueguitar/hotbox.gif     Channel 2 starts to oscilate when the Gain controll goes over 60%, any idees ???.     I had some 50Hz hum but I change the heater current from AC to DC and then it disappeard. There are still some hum when I have channel 2 volume at max, any idees????.     Lars

 

3/31/2000 8:02 AM
Lars	More The first valve has a voltage of 255V and on the second valve it's 280V     Lars

 

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