Ideally the output voltages will be nV, The number of the capacitor times can be connected for charging voltages, But in practice, the value is less. So none of these charging resisters RC is subjected to more than the charging voltages, But in the practice the value is less. None of the charging capacitors even when the capacitors have been erected. The charge available is limited to the charge of the capacitors. So the output is a brief pulse as the capacitor discharge though the load. If spark gap is not conducting then the output voltages will be increasing.