MFJ-1778M Wire antenna 40m-10m G5RV Jr dipole
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.
|Manufacturer's Part Number:||MFJ-1778M|
|Part Type:||Wire Antennas|
|Product Line:||MFJ 1778M G5RV Jr. Wire Antennas|
|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|