MFJ-1778M Wire antenna 40m-10m G5RV Jr dipole
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MFJ-1778M Wire antenna 40m-10m G5RV Jr Dipole
MFJ-1778M G5RV Junior HF Antenna
The MFJ-1778M antenna is a multi-band center-fed dipole antenna capable of 1500 Watts. It consists of 52 feet flat-top fed with 17 feet of 450 Ohm matching section ending in an SO-239 coax connector.
This antenna generally requires the use of a suitable matching network (antenna tuner) since the SWR of the G5RV JR. is almost certainly not 1:1 on any band. The use of a tuner will guarantee maximum performance from solid-state exciters.
The MFJ-1778M is a balanced antenna that is fed by an unbalanced coaxial line. This feed system causes unwanted parallel RF currents to appear on the shield of the coaxial feedline.
A choke type balun such as the MFJ-915 should be used with this antenna to eliminate or reduce the undesirable parallel feed line currents. Failure to use a choke balun may result in RFI, RF feedback, or other symptoms of RF in the shack.
| Brand: | MFJ |
| Manufacturer's Part Number: | MFJ-1778M |
| Part Type: | Wire Antennas |
| Product Line: | MFJ 1778M G5RV Jr. Wire Antennas |
| GigaParts Number: | ZMF-1778M |
| UPC: | 650619005028 |
| Assembled Wire Antenna: | Yes |
| Wire Antenna Type: | Multi-band, non-resonant |
| Antenna Power Rating: | 1,500 W |
| Wire Antenna Length: | 52.00 ft. |
| Antenna Tuner Required: | Yes |
| Feedline Connection Type: | UHF female, SO-239 |
| Wire Antenna Band | Wire Antenna Frequency |
| 40 meters | 7.0 MHz |
| 30 meters | 10.0 MHz |
| 20 meters | 14.0 MHz |
| 17 meters | 18.0 MHz |
| 15 meters | 21.0 MHz |
| 12 meters | 24.9 MHz |
| 10 meters | 28.0 MHz |
