Posted on Jul 21, 2012 6327
Transistors Ql and Q2 and their associated components provide: a low-impedance output with the necessary power to drive the output stages, give increased gain tohigh frequencies, and peaking the video for enhanced transient response. Emitter followers Q3, Q5, and Q7 provides low-impedance drive to output stages, Q4, Q6, andQS. The output stages, with the color difference signals applied to their bases and the luminance signals to their emitters, perform matrixing.
The matrixing results in composite output information, to the picture tube, which contains both luminance and chroma information. Q4, Q6, and Q8 require small heat sinks. Staver type F7-2 or equivalent are recommended (Note: If T0-18 lead arrangement is desired, use 2N5825 for Q3, Q5 and Q7, and GE GET3638A for Q1.)