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144 MHz EME Project
I have recently started up my 144 MHz EME Project. The plan is that I will be finished with the antennas in September �98. A part of this project is also to crank up a more solid roof-mounted mast for the antennas, as well as get a new combined rotator for elevation and azimuth. In the mean time I will perform some sporadic EME try-outs with my current antennas, but there will be no frequent EME-operation until the autumn �98.
144/28 MHz High Performance Transverter
This is a transverter that could be seen in the ARRL Handbook, during the late 80�s and early 90�s. It consists of 6 separate modules, each one of them housing the essential parts of the rx/tx chain. It�s a good idea to build VHF/UHF applications in well shielded modules, because it eases up the construction work and also makes trouble-shooting a whole lot easier. The transverter consists of the following modules:
The links below doesn�t currently lead anywhere, but quite soon they will. Have patience.
- Low Noise MGF1302 Preamplifier
- 116 MHz Local Oscillator
- Double Balanced High Level Mixer
- Transmit Converter With Double Balanced Low Level Mixer
- 10 Watt Linear Amplifier
- 28 MHz Post Amplifier
144 MHz Long Boom Quagi Array
This array project consists of 4 long boom quagi�s, constructed by Dave W5UN and optimized by VE7BQH. The antennas are built on 29�9" (7,24 m) long booms made of wood or fiberglass. It�s also possible to use aluminium booms, but in that case element sizes has to be recalculated. The antennas have 11 elements. The driven element and the reflector are square loops made of 2mm solid insulated copper wire. Antenna gain is calculated to 13.56 dBd and the front/back ratio is calculated to 23dB.
- If you have Acrobat Reader, you can get a simple blueprint of the antenna Here. (In .pdf format)
- Goto W5UN Homepage to learn more about the antenna and EME.
200W Solid State 432MHz Power Amplifier
This is a PA that is built by using a pair of PA-modules from Ericson. Those are coupled in parallel and each module can give a power output of approx. 100W. Just add a pair of coaxial relays and a 28-volt power supply and you have a cheap and realiable power boost on 70cm! A minimum of tuning and pruning is required to make this thing working! More info is coming.