The G-Band series normally operates around 44 Mhz and no modifications were required to tune to 50.066 MHz.   Power output maximum is about 25 watts, but it is at present adjusted to run around 10 watts.

Keyer: A locally constructed keyer keys the DC supply to the first stage of the PA. 
The callsign is stored in an EPROM. The ident transmitted is  -  VK6RPH  PERTH followed by a long key down period.

Antenna: The antenna is a dipole bent in the form of a U shape, with the aim of obtaining an omnidirectional pattern at the expense of  some gain.    The antenna is fed with about 30 metres of Belden 9913 cable and is mounted at about the 20 metre level on the main STW Channel 9 mast.
 

The A Band series tune to 144.460 Mhz without modification. Maximum power output is about 25 watts, with the present transmitter adjusted to run around 20 watts.

Keyer: Similar to 50.066 Mhz.

Antenna: The antenna is a dipole bent into a U shape similar to the 50.066 Mhz system. 
The antenna is mounted at the same level and fed with about 30 metres of Belden 9913.
 

The U Band series normally operate between 450-470 Mhz and some modification was required to tune down to 432.460 Mhz.  The transmitter provides about 10 W out.

Keyer: Similar to 50.066 Mhz.

Antenna: The antenna is composed of four 3 element yagis. 
These are made up as two pairs, each containing two yagis mounted back to back. 
The two pairs are mounted on adjacent legs of the square section tower, with the booms at right angles to the tower diagonal.   Thus there is one yagi pointed at  N, S, E and  W. 
The yagis are fed from a four way power divider. The feeder is about 30 metres of Belden 9913.

The spacing between antennas is not optimum for achieving smooth omnidirectional performance, but in practice no serious nulls have been noted in the pattern.    A computer analysis also suggests the pattern is acceptable.
 

This is followed by a tripler then an amplifier using a M57762 hybrid module. Power output is about 15 watts.

Keyer: The keyer is similar to the 50.066 Mhz unit, but the keying mode is FSK. 
The exciter reference oscillator is keyed via an added varactor diode arrangement.

Antenna: The antenna is an Alford slot fed via about 30 metres of 1/2 inch foam dielectric heliax. The antenna is side mounted at the same level as the others.  No doubt there is some pattern distortion from the intended omnidirectional, but this has proved to be acceptable.
 

All equipment is mounted in a rack cabinet which also contains a thermostatically controlled ventilation fan.

The VK6RPH service also contains a licence for a 10 Ghz outlet and that is in the planning stage.