![]() The final turns ratio turned out to be 3:29. Here is how I assembled a 49:1 impedance ratio transformer for my EFHW.Correction: Torroid part number is 5952003801Link to torroid transformer was attached to the 30 meter EFHW antenna and turns were removed for best match to 50 ohms. This pack typically costs around $30 US and is sometimes even less expensive. One of the most affordable rechargeable battery packs for the QRPer in your life is the TalentCell Rechargeable 12V 3000mAh Battery Pack. A very affordable Li-Ion rechargeable battery.I also found it to be a relatively quiet antenna, I had it hooked up to a Flex-3000 SDR where it is very easy to compare SNR levels between … Collinear 1/2 wave J-Pole… The dipole antenna, how industry defines it …The EFHW 80-10 consistently beat these other antennas in all directions and all distances. EFHW HT antenna functions without additional counterpoise Adding 0.05 wavelength wire to EFHW antenna Collinear 5/8 wave J-Pole vs. Here are my experiments and modifications with an EFHW (end-fed half wave) based on the VK4YE design, testing, 80m loading coil, the coax counterpoise, and t.
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