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.
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.
