In the early 1960s the remaining O and P Stock trains that operated the Uxbridge service, still with their metadyne controls, were converted and transferred to the District line as the second batch of A Stock was introduced.
22.
If Vcc is the supply voltage, and V 2 is the output voltage of the Metadyne, then the total voltage across the load can vary from 0 to 2�Vcc, as V 2 varies between " Vcc and + Vcc.
