according to eimac, if the screen volts is 500, the peak ac voltage is to be 250, (+/-250, or 500V p-p)
>From: "John Coleman, ARS WA5BXO" <[EMAIL PROTECTED]> > >What is the recommended ratio for the modulation on the screen of >4-1000s' When I ran 813s as class C plate modulated finals, I always >found it to need adjustment depending on the audio that self modulates >the grid, the amount of drive, and plate loading. The best I had was a >screen winding on the modulation XFMR. Keeping the screen in phase with >the plate modulation was always a bear of a job. > The best I ever did was with a 6146 final using a screen >dropping resistor I placed a 20 uf electrolytic in series with a 10 watt >resistor whose value was chosen to regulate the level of audio the two >piece network was place from screen to ground which reduced the audio on >the screens to about 40 percent when the plate was at 100 percent. > >John >WA5BXO
