G4CFY 80/40/20m LITE TRAP DIPOLE in 2.5square mm for regular duty. These dipoles mark the next evolution from the original W3DZZ trap dipoles.
The picture is of the 2 trap LTD80/40m, though this one has 4 traps. I will update the picture soon. 80m & 40m dipole and trap dipole have no resonance near 20m and exhibit an SWR on that band of around 5:1.The addition of a pair of 20m traps into the top wires overcomes that problem and also reduces the overall length of the aerial to just 90feet. The low impedance twin feeder allows differential mode signals on receive and transmit to travel along the feeder without a measurable emitted electromagnetic field.
On receive identical noise is picked up on both cores giving almost no differential feeder noise at the rig. It is so quiet using this feeder that at first you might think the aerial system is faulty.
This aerial has been proved to be 2 to 5 S-points quieter than the G5RV and other types fed with 20m coax cable and/or 300 Ohm ribbon. This version is supplied with 2.5square mm cross sectional area multistrand top wires together with 21 metres of the 95 Ohm twin feeder, though greater lengths can be supplied if required. Otherwise you can use a balanced ATU such as the MFJ or the old KW Z-Match or SEM EZ Tune. The endorsement attached is typical of users of the LTD80/40m trap dipole.Experience proves it to be typically 2 S-points higher signal on receive and transmit than the comparable G5RV. The Inverted V configuration often has better performance day and night than a straight configuration but needs to take into account ground capacitance to the outer sections beyond the traps. Otherwise resonance will be below the 80m band and this is corrected by reducing the outers by about 24 each. The item "Antenna 4 Trap Dipole 80/40/20m, 90ft + 21m low noise low TVI 95R twin feeder" is in sale since Wednesday, January 8, 2020. This item is in the category "Mobile Phones & Communication\Radio Communication Equipment\Antennas\Ham/Amateur Radio Antennas". The seller is "spectrumcomms" and is located in Dorchester.
This item can be shipped worldwide.