The 1 watt 20 meter QRP transmitter with VXO. This is a nice QRP
transmitter that can be used in combination of one of the simple
receivers. Normally these designs have only two transistors: one is the
X-tal oscillator and the second the final amplifier. A good example is
my first QRP rig that is also described somewhere on this site. Here
the VXO (Variabele X-tal Oscillator) has a tuning range of 16 kHz. This
VXO is buffered with an extra driver stage for a better frequency
stability and a varicap diode is used instead of a variabele capacitor.
An extra transistor is added for keying the transmitter with a low
keying current. What you can do with such a simple 1 watt QRP power
transmitter. This is a real low power transmitter, so do not expect that
you can do everything with it but... When conditions are normal, you
can easily make many QSOs during one afternoon with stations with
distances upto 2000 km with a simple inverted V wire dipole antenna!
From Europe, I did even make QSOs across the Ocean!
