HS.EFX-127
VHF airband HD end fed dipole, 117-138MHz
Description
- The HS.EFX-127 Series colinear antenna is designed for VHF airband communications where a durable and high performance omni antenna is required. The centre fed dipole design and feed network gives a stable radiation pattern across a wide bandwidth without large pattern distortions. High quality materials and manufacturing techniques are employed throughout.
- • Former Skymasts brand product.
Specification
| Electrical | |
| Frequency | 117 – 138 MHz |
|---|---|
| Max. Input Power | 500 W |
| Omni Deviation | < ± 0.5 dB |
| 3 dB Beamwidth, H-Plane | Omnidirectional |
| Polarisation | Vertical |
| 3 dB Beamwidth, E-Plane | 80 ° |
| Impedance | 50 Ω |
| Gain | 0 dBd (2.2 dBi) |
| VSWR | < 1.5:1 |
| Lightning Protection | Lightning current handling capability: 200 kA According to EN 62305-1 (Test pulse 10/350 μs) |
| Antistatic Protection | All metal parts DC-grounded (Connector shows a DC-short) |
| Environmental | |
| Operating temperature range | -45 to 70 °C |
|---|---|
| Survival Wind Speed | 300 km/h (no ice) 240 km/h (20mm radial ice) |
| Mechanical | |
| Radiating Element(s) | 38 mm dia. brass tube |
|---|---|
| Connection(s) | N(f) |
| Radiator Feed | PTFE dielectric coaxial cable |
| Mounting Section | Aluminium tube 48.4 mm dia. |
| Radome Material / Colour | GRP tube white, 53mm dia. |
| Length | 1800 mm / 70.87 in. |
| Historic Brand | Skymasts |
| Wind Load | 190 N (160km/h) |
| Weight | 7.1 kg / 15.65 lb |
| Mounting Bracket | Heavy Duty Clamp supplied as standard (UA66-22). |
Ordering Codes
| Model | Product No. |
|---|---|
| VHF airband HD end fed dipole, 117-138MHz | HS.EFX-127 |
Diagrams
RADIATION PATTERNS
E-Plane | 128 MHz
RADIATION PATTERNS
H-Plane | 128 MHz
PROCOM A/S reserves the right to
amend specifications without prior notice
PROCOM A/S • Smedetoften 12
DK 3600 Frederikssund • Denmark
Generated : 2026-06-26
Version 1