EFHW transformer 561 MEF-330-1K-Plus

EFHW transformer 56:1 MEF-330-1K-Plus. MEF-330-1K-Plus Multi-Band End Fed Half Wave Antenna Transformer 56:1 Ratio Features three 2.4 inch ferrite cores and very low average Insertion loss 0.37dB This is an End-Fed Half-Wave antenna (EFHW) transformer covering 80/10m amateur bands or any frequency in between. It transforms high impedance 2800 Ohms at the end of the half-wave radiator to 50 Ohms and features very low insertion loss.

Average insertion loss from 3.5-30 MHz is 0.37 dB NO TUNER needed! S 250W continuous in digital modes such as FT8 etc. Polycarbonate housing Hardware: Stainless Steel Connector: Silver/PTFE (Teflon) SO-239 The wire length can be calculated by the following formulas: Length (feet)= 468/Frequency (MHz) or Length (meters)=142.5/Frequency (MHz) Always cut a wire a bit longer to allow for tuning to your desired frequency.

Tuning depends on the height above ground and nearby objects. There are so many ways to install the wire and your imagination is the only limit. You can do it horizontal, vertical, sloping, an inverted "L" shape, Horizontal "L", in "inverted "V shape, etc. Such an antenna will not need radials and in most cases NO Tuner at all.

Be a radio amateur and do some experiments. Grounding at the lug next to the SO239 connector is recommended! Long wires tend to collect electrostatic charges (usually when the weather is stormy) which can produce ESD (electrostatic discharge) at the end of your cable and damage your equipment. The longer wire will give you more harmonic-related resonances, For example, Half Wave wire for 80m or 3.5MHz will give you (8) eight resonances up to 30MHz. VSWR curve might be a bit different at your location. Always aim to put the wire higher and leave the wire a bit longer at the end in order to tune it at the desired frequency. The EFHW instruction manual is available on the FAQ. MEF-330-1K-Plus Multi-Band End Fed Half Wave Antenna Transformer 56:1 Ratio. Features three 2.4 inch ferrite cores and very low average Insertion loss 0.37dB. This is an End-Fed Half-Wave antenna (EFHW) transformer covering 80/10m amateur bands or any frequency in between.

Average insertion loss from 3.5-30 MHz is 0.37 dB. Grounding of cable at the entrance to the home is recommended. F requency coverage: 3.5-30MHz. 250W continuous in digital modes such as FT8 etc. The wire length can be calculated by the following formulas.

Length (feet)= 468/Frequency (MHz) or. Length (meters)=142.5/Frequency (MHz). Always cut a wire a bit longer to allow for tuning to your desired frequency. Sorry, our items are NOT available for pick-up.

No additional information at this time. This item is in the category "Consumer Electronics\Radio Communication\Antennas\Ham, Amateur Radio Antennas". The seller is "myantennas" and is located in this country: US. This item can be shipped worldwide.

MEF-330-1K-PLUS: MEF-330-1K-PLUS transformer only
Brand: MyAntennas