Web18 sep. 2024 · 3:21 is about ratio 64:1, 3200 ohms, 50x64. Every wire has his own impedance at determinate frecuency in each location. You must create the nearest ratio transformer to get the best value ratio for your own wire. I make custom ratio adding or removing secundary turns to get Z=50 ohms. WebGet notified when the kit is back in stockKit includes everything you need to build a 49:1 end fed half wave antenna. Antenna works without needing a tuner on 10M, 15M, 20M & 40M with SWR ≤ 2:1 Easy to build! Just wind the toroid, solder a few joints, connect the wire, and you are on the air. There's also an easy to follow assembly video.
ENDFED/EFHW Antenna & Choke – F5NPV – V85NPV
WebI use an EFHW frequently on portable operations at 20 to 25 watts, and have had only minimal RF in the shack issues, and then only when operating digital modes. I solved it by using a different mouse when using FT8. — For portable operating, I have had very good results with my EFHW. WebThis is an End-Fed Half-Wave (EFHW*) antenna for 80/40/30/20/17/15/12 and 10m bands. Unlike many END FED antennas on the market, this one does not require the Antenna … lynnwood gesa credit union
EFHW 80m extension - MI0KXX
Web5 okt. 2024 · A few weeks prior, Colin (MM0OPX) reached out to me and asked if I would consider testing a new high-quality, highly-efficient QRP EFHW he’d designed. Of … WebThis antenna is only 15m long using 2 loading coils. This antenna is working for 80,40,20,10 and 6m bands. The total lenght is about 15mtr only and using 2 coils and a little stub (s) on the 80m coil or/and the 40m coil. The 2 coils are 35uh and 90uh. The overall lenght is only 15m. Web16 dec. 2024 · EFHW transformers have to compromise their design to cover the very wide frequency range of about 10 to 1. Their primary inductance can't be too low or the transformer's impedance starts becoming to low at the low end and increases the VSWR. The primary inductance can't be too large or leakage inductances start degrading the … lynnwood gas station