BI1UDG-711 I plan to try out the limited DX capabilities of the A-license, originally intending to build a custom machine and antenna. However, I ran into a situation where I could use a pre-built box6 radio in my car, so I decided to start with that first, while still working on building my own antenna.
BI1UDG-711 The materials are very simple: four 1.4m pull-out antenna rods, 4 sets of M4 screws, plastic sheets cut into strips (that are relatively rigid), 4 M4 hook screw, and 4mm inner diameter compression line rings, plus one length of cable with connectors. By adjusting the length of the boom antenna and the angle between the two antennas (30°-40°), we can adjust the antenna performance. The center frequency's standing wave ratio in the 6m band should be controllable within 1.3. Currently, we are still improving it, such as adding a waterproof enclosure.
BI1UDG-711 The central support was changed from 2mm thick PP to 4mm thick MDF, which is much stronger and has largely solved the problem of deformation.
BI1UDG-711 Updated: The wooden board is now re-made with a base to securely hold the 40° angle. A waterproof box is attached on the outside, and it's mounted approximately one meter away from the balcony. By adjusting the length of the oscillator, standing waves can be controlled to be as low as 1.2 or even lower.
BI1UDG-711 Additionally, images for assembly are provided, and the oscillator can be disassembled for easy portability. Retro-style workmanship, no PCB used.😅Because I don't want to waste time drawing or waiting.
BI1UDG-711 Final antenna upgrade: 1 Replaced with a standard microphone and cable. 2. In addition, four clamps can be used to install them in the desired direction. I added a ring to it, and you can also hang it up. Finally, Bob was satisfied. Please note: 1. Ensure that the telescoping antenna is positioned away from walls, whether it is mounted or in use. 2 If you need to adjust the length of your telescoping antenna, be sure to have a clothes drying rack handy – it's very useful. This thread is closed. Let's celebrate!
BI1UDG-711 Also, there's one more thing… when you're working on opening windows, make sure to keep your cat in another room; it would be very disruptive and also unsafe.
BI1UDG-711 BH9FPK The polarization is horizontal; originally it was mounted vertically, but I find that both vertical and horizontal mounting feel similar.
BenRG It's powerful, and I was considering building one for my FT-891. However, the original text only mentions that it works well with low power, so I don't know if the main poster has tested its performance at higher power levels.
BI1UDG-711 BenRG No, because my machine is a QRP (low power) transmitter, with a maximum output of 10-12 watts. Since it doesn't have any coils or other components, its structure is simple and should be reasonably durable, but I can't test its communication performance at high power levels.
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