No DX on the band, so spent sometime to upgrade some of the ham equipment. The SB-200 HV have a certain drop when load. So I decided to upgrade the board:
1) replace all capacitors to 270 uF 450V 105 degree c
2) replace all rectifier diodes to IN5408
3) all bleeding resistors from 30K to 100K ohms
It was completed and the high voltage much more stable now.
1) replace all capacitors to 270 uF 450V 105 degree c
2) replace all rectifier diodes to IN5408
3) all bleeding resistors from 30K to 100K ohms
It was completed and the high voltage much more stable now.
