Sunday, November 8, 2009

Six Meter with SB-200

Recently I performed several enhancement work to the SB-200 which converted to Six Meter many years ago, including:

1) change the ventilation fan to box fan, it gave out more air flow towards the 572B
2) change the plate choke, Teflon rod with 0.6mm wire , 60 turns.
3) improve input circuit to achieve as low as 1.1 . It worked very fine and power output significant improving, with 65W in , power output reached 600W.. acceptable result.