RCS Digifive Five Channel 27 MHz Proportional Transmitter

The transmitter printed circuit board showing the use of early generation silicon transistors.The transmitter is very well contructucted using quality components. The crystal oscillator uses a NKT675 transistor followed by a ASY86 before the power amplifier transistor. The variable width generator circuit uses 7x 2N2926 red spot transistors. The large capacitors form part of the battery charging system. There is no isolating transformer. The 240Vac mains input is used directly via the isolating capacitors.