Numerical simulations show that proper fundamental mode-locking repetition range of hybrid soliton pulse source where transform-limited pulses are obtained is extremely increased with the use of linearly chirped tanh apodized fibre Bragg grating. Near transform-limited pulses are generated over a frequency range of 1.6 GHz (1.9-3.4 GHz) around a system operating frequency of 2.5 GHz.