Hi, does anyone have any experience or ideas regarding a Blue Bottle Rocket Stage 2 power supply, the red light turned to green after a minute when switched on to indicate mic was ready to use, now it stays on red.
I've checked the fuse and it looks ok.
It might help to explain the function of the red light that should be turning green:
From the manual: 'A typical tube mic power supply applies both heater and plate voltages simultaneously once power has been
switched on. In this case, the high voltage potential on the plate forcefully attracts electrons from the not yet heated
cathode, a process known as “cathode stripping”. This means that each time the power supply is switched on, the
microphone tube changes its electrical properties. To put it simply, the tube begins to wear and gets noisier.
To avoid this problem the Powerstream’s soft start feature delivers the tube’s heater voltage first. The Powerstream’s
circuitry also prevents the heater current from exceeding the limits for which the tube was designed. Without this
feature the tube’s cold heater would draw more current than specified, and begin to deteriorate the valuable microphone
tube. After approximately 45 seconds — when the cathode is fully heated — the plate voltage is gradually applied starting from 1.5V to 120
So seems maybe the heater/plate voltage is faulty, not heating up?
Any idea what the problem is and how to fix it? Blue have not been much help!
Many thanks.
I've checked the fuse and it looks ok.
It might help to explain the function of the red light that should be turning green:
From the manual: 'A typical tube mic power supply applies both heater and plate voltages simultaneously once power has been
switched on. In this case, the high voltage potential on the plate forcefully attracts electrons from the not yet heated
cathode, a process known as “cathode stripping”. This means that each time the power supply is switched on, the
microphone tube changes its electrical properties. To put it simply, the tube begins to wear and gets noisier.
To avoid this problem the Powerstream’s soft start feature delivers the tube’s heater voltage first. The Powerstream’s
circuitry also prevents the heater current from exceeding the limits for which the tube was designed. Without this
feature the tube’s cold heater would draw more current than specified, and begin to deteriorate the valuable microphone
tube. After approximately 45 seconds — when the cathode is fully heated — the plate voltage is gradually applied starting from 1.5V to 120
So seems maybe the heater/plate voltage is faulty, not heating up?
Any idea what the problem is and how to fix it? Blue have not been much help!
Many thanks.