I have included a schematic of a circuit I built to connect a composite monochrome signal (TS1000/QL) to a TTL input monitor. The circuit strips the sync pulses and then separates the horizontal (H) and vertical (V), and generates the (H) horizontal pulses while the (V) is active. Most TTL monitors require continuous (H) horizontal pulses to provide a signal to generate the high voltage to the CRT (cathode ray tube). The TS1000 stops sending (H) pulses while the (V) pulses are active. The circuit provides the inverse of the H & V signals too. Some TTL monitors need them to be inverted from what the TS1000 or QL provides. For any assistance on this you may send a SASE to Jim at 3545 S. Dupont Ave. #2, MPLS, MN 55408-4022. Jim promises soon to give us an article on repairing QL microdrive units.
