12
The rear of the input switch shaft is exposed. The sharp shaft edges should be filed or sanded to break the
edge into a taper or radius. This significantly helps slipping the shaft into the rear switch. A few minutes
tapering the edges can prevent switch damage and prevent expensive broken switches.
Figure 16 All units break or radius shaft rear edge
Remove the tubes, the terminal strips, and lugs in these locations, and disconnect the two orange 1000 pF
high-voltage blocking capacitors that go between the RF parasitic board and plate choke. Unsolder these
capacitors at the end that solders to circuit board above the Plate Tune capacitor. See figure 17
Figure 17 811H only unsolder and unscrew
