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2022-10-08 17:00 UTC,
When I operate in the field or on a summit, I like to have all the stuff I need. To do, I have a complete backpack to operate on HF and 2m bands in SSB, FM, digimode and even CW. For this last mode, I require technical help… I will be more clear later on. ;-)
So, what is the content of my backpack ? It weighs about 6.5 kg.
[Backpack inside]
[Backpack pocket]
First, I require some ropes and throw-bags to hang antennas.
[Ropes and throw-bags]
It is very easy to reach a branch at 6 or 7 meters and then raise the antenna wire. Actually, I have two EFHW antennas. One for 40m, 20m and 10m and one for 17m and 12m… I often test antennas, so, these are not representative, next month, it should be a different setup.
[EFHW antennas]
Some coaxial cables are necessary !
[Coax]
At this time, I use a Xiegu G90. This transceiver works on all HF bands and outs 20 watts. It’s comfortable when you are outside. Other advantage of this rig, it has an embedded ATU.
[Xiegu G90]
For the 2m band, I use a transverter. This device is connected between the HF transceiver and the antenna. It converts 28 MHz from the rig to 144 MHz and, vice-versa, the 2m signal received from the antenna to 28 MHz. It increases/decreases the frequency with 116 MHz. So, 29.500 MHz FM on the G90 corresponds to 145.500 MHz FM in the air. The G90 support FM and split mode, so I can also use repeaters. And 28.174 MHz USB reaches 144.174 MHz USB (freq for FT8 on 2m band). Input of 5 to 10 watts outs about 15 watts to the antenna.
[28/144 Transverter]
This unit is build by [UT5JCW in Ukraine]
… it is not possible to get one at the moment.
For digimode, a raspberry pi 4 and its 7" screen does the job. A Rii Mini i4 keyboard is connected via Bluetooth (or with the supplied 2.4 GHz USB dongle, if HF interferes)
[Rapsberry Pi 4]
[Rapsberry Pi 4]
To connect it to the G90, I’ve opted for an all-in-one device from [XGG Comms]
providing a sound card and the CAT control, with a unique USB plug.
[XGGComms interface]
And for CW, a specific cable from USB to a CW jack. flrig CW Keyer is able to pilot it with RTS or DTR key line. It becomes easy to transmit Morse code with the keyboard (not the orthodox way !)
[USB CW cable]
[USB CW cable]
To power all this stuff, every device has a Power Pole connector, plugged on a power hub to a LiFePO4 battery
[Power supply]
A 12V DC to 5V USB converter is necessary for the Raspberry Pi
[12V DC to 5V USB converter]
Finally, a notepad, a [bands plan]
(thanks F4EED) and some tools complete the backpack.
[Notepad and bands plan]
[Tools]
And you, what do you put in your backpack ?
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