Capacitor set for Bally AS-2518-51 Sound Board

Capacitor set for Bally AS-2518-51 Sound Board


Kit includes all new capacitors:

C5 and C13:
Original = Axial Electrolytic 1uF, 50 Volt
Kit = Axial or Radial Electrolytic 1uF, 50 Volt

C7:
Original = Axial Electrolytic 470uF, 6.3 Volt
Kit = Axial or Radial Electrolytic 470uF, 16 Volt or 470uF, 25 Volt

C8:
Original = Axial Electrolytic 470uF, 16 Volt OR 220uF, 16Volt
(see notes below)
Kit = Axial or Radial Electrolytic 470uF, 16 Volt

C15:
Original = Axial Electrolytic 4700uF, 25 Volt
Kit = Axial or Radial Electrolytic 4700uF, 25 Volt


Notes:
1 - Bally used a simple 1st order high pass filter on their audio boards (C8). Early Bally -51 sound boards used 220uF axial caps but soon afterwards switched to 470uF axial caps. If C8 = 220uF then the filter allowed 90Hz and higher to speaker. If C8 = 470uF then the filter allowed 42Hz and higher to speaker. This increase in capacitance value allowed wider range of sound to be heard. Replace the existing C8 with the included 470uF capacitor. If your original capacitor was 220uF and there is too much bass after reworking the board then try changing the value back to 220uF.

2 - higher voltage rated capacitors are a good substitute for lower voltage rated devices.devices.