134Ghz Equipment
Transverter
Under construction
PLL LO's
The basic 116MHz OVCXO 's are shown above. These are based on the well known G8ACE design and are controlled as VCXO's with the Cupido PLL locked to 10Mhz, in this case from a GPS source. Two oscillators are used one at 116.666Mhz for the LO to produce a 145Mhz IF and the other as a Tx source at 116.79Mhz, using the LO as a straight through multiplier. The sources are switched into the following multiplier chain on transmit and receive.
This photo shows the other side of the LO box which contains the multiplier chains from 90Mhz to 11.8Ghz. This comprises a G8ACE x24 multiplier stage which accepts the 116MHz from the OVCXO and procuces an output at 2800Mhz. This is then further multiplied in a G3WDG x4 design, to produce an output in the 11.2Ghz region.