Dipole and Vertical Quarterwave Antenna
Obliczymy ostateczną cenę na podstawie wybranego pliku. Sprawdzisz ją i zaakceptujesz przed płatnością.
Zapisane na tym urządzeniu.
These use telescoping whips to create a portable dipole or a vertical antenna from 20m to 6m.
- Ocena
- 0 / 5
- Polubienia
- 4
- Pobrania
- 19
- Wydruki
- 0
- Wyświetlenia
- 256
- Oceny
- 0
Aktualizacja u źródła:
Informacje o modelu
- Źródło
- Printables
- Kategoria
- Electronics
- Licencja
- Creative Commons — Attribution — Noncommercial — Share Alike
These mounts allow you to connect a 5.6m whip (or pair for a dipole) to create a portable HF antenna. The toroid (size 140) is held in place with zip ties that are fed through the body of the part. You will see that the bill of materials is very similar so it does not take much to build both. Also, this design is compatible with the PAC-12 style antennas as well as the cheaper vertical antenna with the red cylindrical feed point. They both use M10 threaded whips and ground spikes. The reason to use this version would be for a small weight savings and the addition of the integrated choke.
All parts are cheap on sites like Aliexpress. Look for sellers using “Choice” shipping to get free shipping on orders over $10)
For the dipole, you need:
2 … 5.6M whips ($11 - $17 each)
2 … 15mm M10 inserts ($3 -$4 for a pack of ten)
2 … 10m M10 inserts ($3 -$4 for a pack of ten) (you could just use 15mm ones for all four)
1 … BNC panel mount
1 … FT-140-43 toroid ($7- $10 from Amazon)
4 … common zip ties (free?)
misc enameled wire (free?)
Some sort of tripod with M10 threads (I found one by luck at the local Goodwill braded as “Emart”)
The whips attach at a 15 degree angle. If you orient it so they point upwards, the natural droop of the whips keeps the tips approximately level for a 20m dipole. If you orient the whips pointing downward, you are more likely to see an impedance of 50 ohms due to the more ‘inverted V’ configuration.
For the vertical, the parts list is very similar:
1 … 5.6M whip
2 … 15mm M10 inserts
1 … BNC panel mount
1 … FT-140-43 toroid
4 … common zip ties
misc enameled wire
misc ground plane wires and ground spike
See photos for construction. You can heat the threaded inserts and press them in, but I used an M10 bolt on the outside to pull the insert into place. Note that the enamel wire is soldered to the threaded insert before pulling it into place and there is space for the solder joint already cut into the model. Toroid is wound as a simple 1:1 Choke Balun (Guanella).