site stats

Efwhアンテナ

http://ja1xrq.g.dgdg.jp/TrapEFHW/TrapEFHW.html http://www.vibroplex.com/contents/en-us/p3409.html

First build ever. EFWH 49:1 UnUn in progress, not sure how to

WebMay 1, 2024 · PART - 1 : The EFHW antenna as a radiating and receiving element is a decent multi-band antenna with good efficiency on all bands, provided it is driven at its … WebEFHW 80-10 Antenna 160 meter Adapter Note: Also adds 60 meters !!! Steve Ellington 10.4K subscribers Subscribe 18K views 4 years ago Here's a quick, easy way to put your … hallo essen https://robina-int.com

商品一覧 - ラジオパーツジャパン 本店

http://print-man.jp/~jr1gdy/wiki/index.php?EFHW%E3%82%A2%E3%83%B3%E3%83%86%E3%83%8A WebJul 20, 2024 · Engineering the EFHW 49:1 Transformer and Antenna July 20, 2024 By Gary Rondeau After doing the ferrite transformer scaling experiments last time, and learning a bit more about what matters in these transformers, it was time to make a stab at designing one. Let me review the salient observations from the previous work. WebOct 18, 2024 · An end fed half wave antenna is one of a specific length depending on the frequency that it is to be used on, for example, an end fed half wave antenna for 80 meters is about 130′ long. The length of a half wave antenna is calculated using the following formula: L (ft) = 468 / f (freq in mhz). halloessen

XRQ技研トップページ

Category:XRQ技研トップページ

Tags:Efwhアンテナ

Efwhアンテナ

Emcomm III home base vs myantennas 8010 what

WebEFHWアンテナでは終端給電であるので非常に高いインピーダンスを送信機の50Ωと整合させるため、トランスフォーマーが必要なのですが、これが結構大きくなってしまいま … WebMar 13, 2024 · The EFHW-8010-2K is the heavy-duty QRO version which supports up to 2kW ICAS power levels. It is 39.6m long and is resonant on 80 through 10 meters, while …

Efwhアンテナ

Did you know?

WebApr 9, 2015 · EFHW-4010 Rated 4.93 out of 5 based on 43 customer ratings ( 43 customer reviews) $ 179.99 – $ 204.98 EFHW-4010™ Multiband End Fed Half Wave Antenna NO … WebEFHWA (片端給電半波長アンテナ) マグネットアースシートを使ったバーチカルで移動運用をおこなっているうちに、アース損失が気になり、また、見た目のよい移動運用（周囲対策!)を求めて作ったのがEFHWAです。. EFHWAとはEnd Fed Half Wave Antenna（片端給電 …

WebMay 9, 2024 · Trying out a new 49:1 End-Fed Half Wave HF antenna from Balun Designs. WebMay 20, 2024 · さて、EFHWはエレメントの末端から電圧給電するタイプのため、アンテナインピーダンスが数KΩに達する。 つまり一般的な50Ωの同軸で給電するにはインピーダンス変換が必須となる。 また、アンテナ効率を極力落としたくないため14MHzはそのまま10mのエレメント長とし、それ以下の周波数をローディングコイルで賄ってタップ切 …

WebThe diagram below shows the basic arrangement of the 2m Half-Wave version of the antenna. To construct the antenna, first select a suitable length of grey 25mm conduit (as … WebMay 6, 2024 · First you don't necessarily have to do anything. The SWR is below 3 for the bands and most transceivers can handle that OK. If you want to try to get the resonate points inside the bands you will need to lengthen the wire. it is usually a good idea to start with too much wire and trim the length to bring the resonance down, but in your case it …

WebHeat would make a lot of sense. And, 15 watts is probably a bit much for that little thing (I believe I may have read somewhere that K6ARK said 20W was as high as high as you …

WebAntennas NO Tuner Needed! Multi-band End Fed Half Wave (EFHW) antennas, Dipoles and OCF dipole antennas- See our Best Sellers!! Dipole antennas (1) EFHW … hallo eheleutehallo hallo 82WebNov 26, 2024 · The method for securing a carabiner to a kite line is simple and effective: simply wrap the kite line three times around the shaft of the carabiner. The cable tie loop … halloesWeb7MHz用 EFHWアンテナのSWR測定 End Fed Antenna YSNR 2.16K subscribers Subscribe Like Share 675 views 1 year ago 64:1トランスを自作して約20Mの1.25mmのIV線を張り … hallogun mm2 valueWebSWR値 ：すんなり1.1におちました（z=60+j0）. 但しラジアルを付けない場合、SWRは3以上. アナライザーに振れるとSWRがふらつくのでコモンフィルターを挿入しました。. … pk jonesWebVibroplex, Bencher, GHD and Hi-Mound Morse Code keys. INRAD headsets, microphones and filters. Par EndFedz EFHW antennas, Spiderbeam fiberglass poles. mAT-TUNER automatic antenna tuners, Easy-Rotor-Control rotator controllers, DX Patrol receivers hall of justice louisville kyWebSep 18, 2024 · An end fed half wave wire can present a feed point impedance of 2500 Ω or more. That’s a 50:1 impedance mismatch for a 50 Ω output radio (SWR of 2500/50=50:1). A typical ferrite core transformer as above with a 7:1 turns ratio (49:1 impedance ratio) or more will be “helpful”. As an example, on 80 meters, with the radio or feed point on ... pkkkicks