I have found nothing on the net about this little doozie. A power supply and interface box for a studio microphone that uses a valve and condenser in the body to produce a 'warm' sound. Yeah right!
Any way, the box just keeps blowing its fuse. Replaced the MOVs and it made no difference. There's a high voltage and low voltage side coming out of the transformer. Its all conventional design, with no switching. Disconnected the high voltage side and the fuse doesn't blow, so.......
There's only five capacitors on the board, so I just replaced them all as it would be so cheap to do so. The box then powered up fine. I'm not sure at this stage which one was causing the problem, but I suspect the small 63v 47uF one sitting right next to four diodes that judging by the scorching on the PCB, run really hot.
Anyway has anyone seen any similar boxes like this? There appears to be very little on the net about these, and no standards fir pinouts/voltages etc
Any way, the box just keeps blowing its fuse. Replaced the MOVs and it made no difference. There's a high voltage and low voltage side coming out of the transformer. Its all conventional design, with no switching. Disconnected the high voltage side and the fuse doesn't blow, so.......
There's only five capacitors on the board, so I just replaced them all as it would be so cheap to do so. The box then powered up fine. I'm not sure at this stage which one was causing the problem, but I suspect the small 63v 47uF one sitting right next to four diodes that judging by the scorching on the PCB, run really hot.
Anyway has anyone seen any similar boxes like this? There appears to be very little on the net about these, and no standards fir pinouts/voltages etc
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