Typical VSWR curve
HX 2/…-GP 300
Helical Antenna for Portable Equipment in the 2 m Band
Description
- Flexible, conical steel helix moulded in flexible thermoplastic rubber.
- Reduced-size ¼ λ helical antenna whip.
- Optimum performance compared to physical dimensions.
- Delivered factory tuned and tested to ensure minimum VSWR.
- Especially designed for Motorola GP 300, GP 344, GP 360 and
GP 388 (150 MHz band) etc.
Specification
| Electrical | |
| Model | HX 2/…-GP 300 |
|---|---|
| Frequency | 2 m band covered by three models |
| Antenna Type | Shortened ¼ λ helical antenna |
| Max. Input Power | 50 W |
| Polarisation | Vertical |
| Impedance | 50 Ω |
| Gain | Approx. -3 dB (compared to a ¼ λ portable antenna) |
| VSWR | < 1.5:1 when mounted directly on portable equipment |
| Bandwidth | ≥ 16 MHz @ VSWR ≤ 3.0:1 |
| Mechanical | |
| Connection(s) | 1/4″-32 UNEF |
|---|---|
| Materials | Steel helix moulded in flexible thermoplastic rubber Weather- and shockproof plastics Cu-nite brass |
| Colour | Black |
| Historic Brand | Amphenol Procom |
| Height | Approx. 150 mm / 5.91 in. |
| Weight | Approx. 0.03 kg / 0.07 lb. |
Ordering Codes
| Model | Product No. | Frequency |
|---|---|---|
|
HX 2/l-GP 300 |
140000136 | 144 – 160 MHz |
|
HX 2/m-GP 300 |
140000128 | 152 – 168 MHz |
|
HX 2/h-GP 300 |
140000127 | 160 – 175 MHz |
Additional Information
Diagrams
TYPICAL SWR CURVES
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