End fed questions
Displaying 1-6 of 6
| Mar 20th 2019, 13:21 | |
Tscott78738Joined: Mar 5th 2012, 02:13Total Topics: 0 Total Posts: 0 |
I have an end fed running along the top of a wood stockade fence. I can get it about 10 feet higher but it will be about 4 feet from a metal guard rail. Is that too close? |
| Mar 21st 2019, 14:35 | |
W1VTSuper Moderator Joined: Apr 4th 1998, 00:00Total Topics: 0 Total Posts: 0 |
The only way to find out is to give it a try. Sort of like choosing hot pepper sauce for food. One person's "too hot" is another's mild. Typically you need a better antenna to do voice than CW/data. WSJT and the digital mode FT8 are very popular for hams starting out on HF. Zak Lau W1VT ARRL Senior Lab Engineer |
| Jan 25th 2022, 11:06 | |
kw4jmJoined: Apr 30th 2014, 03:38Total Topics: 0 Total Posts: 0 |
End fed question: My 65' end fed with 64:1 transformer works great on 40-20-17-15. I experimented by adding a short coil at the transformer end to see if I could get it to dip at 60m. To my surprise the coil changes nothing in that range. It dips at 6.5 mHz no matter how much coil I add. Any ideas why this is? Thanks, Scott kw4jm |
| Jan 25th 2022, 12:24 | |
W1VTSuper Moderator Joined: Apr 4th 1998, 00:00Total Topics: 0 Total Posts: 0 |
Hi Scott, You can't add a loading coil to either end of an fed antenna because both ends need to be high impedance for the transformer to work properly. Loading coils are typically placed where the impedance is low, not high. Zak W1VT ARRL Senior Lab Engineer |
| Jan 25th 2022, 13:00 | |
kw4jmJoined: Apr 30th 2014, 03:38Total Topics: 0 Total Posts: 0 |
Thank you Zak. That is so clear and informative, again I say thank you. Scott |
| Mar 5th 2022, 13:46 | |
KJ7WUZJoined: Mar 31st 2020, 15:11Total Topics: 0 Total Posts: 0 |
I am purchasing a 5W QRP radio kit for 40m recently featured in the Feb 2022 QST review column. I am a newly licensed Tech that wants to learn and use CW for portable operation. Would an EFHW be the antenna for this? Should I attempt a homebrew EFHW or just go with say, a Par EndFedz 40? I fear the Par may not be long enough, designed for the 40m band and the CW segment I am allowed to operate in is the very lower end of the band. (i have used a Par EndFedz SWL to listen for years and love it). Thank you, and 73 Dave KJ7WUZ |
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