Need help! I have Chinese tube mic, about 4-5 years old, distributed by Cascade Microphones. It is the same or almost the same as the SE Electronics 5600 series from the same year with a big cylinder design, removable tube, 9-point selector switch for patterns on the supply...I believe Cascade simply rebranded the SE models.
It went totally out a few months ago. Then it came back on and worked few weeks and then went out. No noise, microphonics, warnings at all. The tube does not glow (assume it would), power is coming down the cable (tested that), replacing the tube did not help. Don't have a tube tester. Anyone want to repair this thing?