10GHz Tower Mounted System
by John WB9PNU
The Tower Mount portion of the system consists of a DB6NT Model MKU-10-G3 transverter and a DB6NT Model MKU-PA-101H power amplifier.
The outdoor enclosure is a WILIGEAR WOE-001 Die Cast Hinged Outdoor Enclosure, which I purchased from http://www.wlanparts.com/ , it came with mounting brakets and "U" bolts for mounting on a mast.
The SMA connection on the bottom side is for connection to the dish feed horn. On the right, are two "N" female to SMA female connections. One is for the 10MHz reference signal and the other is the 144MHz IF.
A multiconductor cable (rotor cable) connects the tower mounted system to the control console (under the FT-817).
This cable carries the 12VDC power, PTT from FT-817, signal from sequencer that it has switched, power output monitor voltage from both the Transverter and the Power Amplifier, which are displayed on the Bar Graph Power Meter mounted on the front of the Control Console. The Bar Graph Power Meter was purchased as a kit from DEMI at $20.00.
The RF cables used are Tensolite SemiFlex Microwave Cables.
The small circuit board, to the left and under the TR relay, is a Kuhne SEQ2 sequencer. Two step sequence, step one switches the TR relay, second step applies 12VDC to the 10GHz power amplifier. The relay output of SEQ2 is 12volts.
Since I am using the more commonly avaiable 24VDC falesafe microwave relay, I needed to purchase another kit from DEMI. Located in the lower right is the DEMI RVD-1 24volt relay driver. Available for $10.00 in kit form.
The system will be mounted on an existing tower which also supports my 30m/17m/12 Yagi and also my 6m Yagi. Tranverter and 20" Offset Dish will be mounted to
a Yaesu Model G-550 Elevation Rotor. This will place the Dish at approximately 35 feet.
In the final installation, the 10MHz reference signal will be supplied to the DB6NT Transverter from my GPS Disciplined Oscillator. This should provide accurate
frequencies as well as minimal drift. For bench testing, I used my Trimble 10MHz OCXO.