Efhw swr
WebMar 26, 2024 · The fact that you're hearing more "stuff" on the EFHW could actually imply it's more sensitive. I was simply pointing out that a 20M EFHW should not have anything remotely like a nice SWR on 40 or 15. When I run a 20M wire on my 49:1 ununs (one commercial QRP, one home-made for high power), the SWR is over 30:1 on 40 and 15M. WebFeb 14, 2024 · A VSWR sweep of the unun after adding a 100pF capacitor shows an SWR <5:1 from 160M to 10M. In theory, my LDG Z100 Plus autotuner should be capable of matching the impedance of this 49:1 …
Efhw swr
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WebEFHW high SWR. I have created an efhw antenna with a 49:1 transformer and 34.7 feet of speaker wire and used 3 feet of RG316 coax. The coax is turned 9 times around a ferrite core which helps with the SWR however I still get reflected power in the antenna. Im not sure what im doing wrong with this antenna. does anyone have any suggestions? WebJan 24, 2024 · The EFHW (end fed half wave) needs to be classified as a specific case of the class of end fed wire antennas. ... With my installation, a ground rod was excellent to sufficient for most bands and 2 rods were slightly better for SWR. You may try adding additional .25 counterpoise wires for problem bands if you really don't want to use a …
WebThe EFHW performs similarly to a resonant, half-wavelength dipole on 80 meters, radiating best broadside to the antenna. As long as the impedance at the end of the antenna is … WebUnlike the dipole antenna, which is comprised of two quarter-wavelength wires and fed at its center, the EFHW is a half-wavelength antenna with the coaxial cable for your transceiver attached at one end. It has become …
http://www.vibroplex.com/techdocs/EF/ALLBAND_KW_MANUAL.pdf WebMar 21, 2024 · Issues with high SWR on HF Kits EFHW 49:1 UnUn kit. I recently tried assembling a EFHW kit, and some problems came up in testing. I believe this is the kit; I …
WebReviews For: MyAntennas EFHW-4010 4-Band End Fed Dipole Category: Antennas: HF: Verticals; Wire; Loop. ... 40M resonated near 7.0 MHz and 20 and 15 exhibited under 2:1 SWR throughout each band. On 10 the 2:1 SWR bandwidth covered from 28.0 to 28.9 MHz, so I stopped there. On 40 I can go up to 7.3 MHz and be right at 2:1 so basically all … dodge 5-speed manual transmission fluidWebWant to thank TFD for its existence? Tell a friend about us, add a link to this page, or visit the webmaster's page for free fun content. Link to this page: dodge 8 seater suvWebFeb 24, 2024 · All I need to see is the MyAntennas EFHW SWR graph. Probably 99% of users think it's great. But consider this: any time we see successive SWR peaks diminish with an increase in frequency, the reduction in SWR is attributed to loss. In the case of the MyAntennas (and typical of all toroid transformer EFHW designs), that represents … exxon hartfordWebMar 29, 2024 · Adam includes instructions for building an EFHW with a counterpoise, without a counterpoise, or a random wire antenna. The coil can be configured as a a 49:1 Unun, 9:1 Unun, or 1:1 Balun. ... Since I configured the K6ARK kit as a counterpoise-less EFHW, I wasn’t entirely sure how stable the SWR would be in the field. For this reason, I … exxon greentown paWebAug 12, 2024 · W9HJ QRZ Lifetime Member #294 Platinum Subscriber Life Member QRZ Page. Here is a little comparison between my homemade Terminated End Fed antenna and a traditional EFHW antenna. The difference in receive signal is night and day different. Also, contrary to popular opinion, transmitting on it is good also. I've gotten over 22,000 … exxon highway 81 centerWebKM4ACK EFHW Antenna SWR. QRPGuys EFHW SWR. 2024-05-04 Cool afternoon at k-4265 today, in the 50s and cloudy. But I had to test my 40/30/20 qrpguys EFHW again in the park. Worked perfectly on all three … dodge a100 body panelsWebMay 6, 2024 · This is a reading from my RigExpert AA-35 ZOOM of my EFHW 40-10 inverted L with radials, and feedpoint 2 feet above the … exxon helms burton