[Radioroslyn]

Hi Bob,
Those two resistors are a little critical in terms of there resistance as they control the amount of filament voltage that goes to the filament string. Too low resistance and you could burnout the filaments or too high not enough filament voltage giving poor performance. There usually a high value cap in the filter can like 100 or 200mfd @ 15 or 20vdc. This is where the filament volt exits the p/s and goes onward to the filaments check your voltage there to be sure it's proper.

GL
Terry