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For the 49:1 transformer 50x49=2,450 closest standard value is 2.4K. Don't handle fragile magnet wire insulation with pliers. Leave the wire long enough to get a good grip and wear gloves if necessary. Twist the twisted part together tighter. Shorten the capacitor leads.
its design is in its 49:1 impedance matching transformer, or unun (connects an unbalanced feed line to an unbalanced radiating element,) where much of this DIY is focused. The 132-foot half-wave radiating element presents about an 1800 ohm (at 10 meters) to 5000
Check your connections, adapters, jumper cables independently. (Eg replace the transformer with a 50 ohm dummy load and sweep it, check that is 1:1)
21 mar 2022 · Assuming you've calibrated your VNA, the test point impedance appears low, which might indicate a too high transformer ratio. So check for shorts between turns anywhere your primary windings cross over or are touching each other or anything else.
4 sie 2020 · This is the page on the End-Fed Half-Wave antenna with a 49:1 transformer. This is a multiband antenna without the need for any tuner (which is the best type of antenna).
The 49:1 impedance transformer ( or 64:1 ) will help you bring down the high impedance of your resonant EFHW antenna to almost 50 Ohm. Let’s have a look at a few details on how to build a 49:1, or a 64:1 impedance transformer.
Attach a 2400 ohm resistor between the antenna wire and ground, and test using a SWR meter. SWR should be under 1.5:1. Alternatively, set up a half-wavelength wire outside and connect the matching unit with an antenna analyzer.
