Repair

Hq Power adjustable PSU

Here is teardown of one failed power supply. What is inside Two 6.8 uF 400V capacitors had failed and burned the mains fuse. Good design that it was well protected. But again the failure was bad electrolytic capacitors. This device was not worth to repair.

MS8209 teardown and repair

Mastech MS8209 is real multimeter that can measure almost anything. I have written some comments on Mastech MS8209 years ago. Some technical data on the back of the multimeter. The things I liked: – practically all the necessary multimeter measurements including frequency and capacitance measurements – good mechanical consruction, convient size and durable – the