Counterpoise Length For EFHW? Depends (

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Leopoldo, YV6ENB, is asking what is the recommended counterpoint length and random wire arrangement for EFHW antenna? Watch to learn more about the different options.
#counterpoise #EFHW #randomlength
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22 янв 2023

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Комментарии : 28

@James_Bowie Год назад

Unless you are talking about Bach's music, I think you mean *counterpoise*

@glenmartin2437 Год назад

Thank you, Dave. Experiment and persevere.

@johng7rwf419 Год назад

Thank you for your good work. J

@rbh1151 Год назад

Excellent, as always - thank you Dave! I use a "special" length of 107 feet for my end fed wire. It is non-resonant, (but easily tunable) on any ham band 160 - 6 meters. With a 9:1 unun and a very long (>110 feet) counterpoise, my rig internal tuner matches it on every band with excellent on-air results. I also have a choke just before the unun to prevent the coax shield being recruited. N7RLV near Seattle

@WILLIAMPERRELLI 5 месяцев назад

Interesting How did u arrive at the various lengths? I hv a myantennas, 134 foot, 9-1 balun, , 80-10. In conversation, I added a 34 foot counterpoise, clipped to the ground rod at a 90 deg angle. With my mfj tuner, I can work 160!! Not great of course but ok! 1.5-1.7 swr’s. Any further advice is appreciated. Billy N1 mrk

@norrinradd8952 Год назад

In this case, when Dave says "it depends" this means, EXPERIMENT. See what works for you and let us know. Dave gave a few ideas of what to try, but if you're looking for additional tips, just look for EFHW on YT and see what others have done. Take a look at the websites of EFHW manufacturers and see what they suggest. Personally, I think the best thing you can do is experiment and see what works for you. I have an EFHW cut for 10m that I usually run horizontal and occasionally vertical. I cut a small length of wire to use as a tuning stub that I cut for the lowest SWR near the FT8 frequency. I had no problem working 4 continents.

@Art_64 Год назад

What constitutes "works"?. IOW, is it min SWR? What is the metric used to show what works as a countrrpoise length? Thanks

@bassdee10 11 месяцев назад

Hello Dav ? my shack is on the second how do i setup a decent ground up there thank for the videos and time you put in to help us, thank you Dav

@AlvinMcManus 3 месяца назад

My antennas are all grounded to a copper plate clamped on an 8 foot ground rod with a bulkhead connector to the shack side.

@davecasler 3 месяца назад

Sounds like you’ve got your grounds under control! 73 from Dave

@KH07734 Месяц назад

I have (2) ZEP type EFHW transformers at 49:1 and there is no ground/counterpoise connection for this type. What is your suggestion if any?

@paulloveless4122 Год назад

Sir is your call sign referring to "Original Gangster"? Serious question lol. KC8SGJ

@ku4uv Год назад

I've wondered that myself!

@rickmckee6698 Год назад

No counterpoise needed on the EFHW, it's a voltage fed antenna, not a current fed antenna, so there is very little to no current present to worry about. A simple earth ground is plenty sufficient on the EFHW.

@w4mps1964 9 месяцев назад

Hi Dave. Would be helpful to hear your thoughts about an EFHW counterpoise when using the antenna in a portable operation when you don’t have a permanent ground connection. 73, Marc, W4MPS

@threadripper979 Год назад

Counterpoise

@subramanianr7206 Год назад

Yes, his paid assistant makes such silly mistakes and Dave does not care at all (and this is not the first time) De VU2RZA

@AlvinMcManus 3 месяца назад

How long do you recommend the coax run to be if you are counting on the coax counterpoise. Is it expressed as a ratio of wavelength or a percentage of the frequency?

@davecasler 3 месяца назад

I think the kayaks are used for testing is about 75 feet long. And that seems more than enough. It’s interesting that the iPad thinks kayaks are coax.

@ggggg4030 Год назад

How do I know if I have RF coming back into the shack?

@uns3cur3 Год назад

Is there an optimum height for the UNUN?

@kiweekeith 10 месяцев назад

Thanks Dave, You have answered MOST of the Questions..... BUT Not This One .... :-) :-) :-) OK, What is the 'Placement' of the Said Counterpoise ????..... Does it run 'Under' the 'Radiator' / Antenna OR is it in the Opposite directions .... Some say NEVER Under while others just don't say :-) :-) :-) Would love you to PLEASE clear This One Up .... I have just Earned my 'Ham License, although being well on the Wrong Side of 70 already .... Have been wortking 26 & 27Mhz CB Bands for years, now running my 'Granny Radio' ... An Older ICOM IC735, though a 49:1 UnUn into a 'Random Wire' Antenna ( Not actually Random .... :-) :-) :-) ) Thanks for All your Great Vidclips, Fantastic Info. .... Cheers from Christchurch, New Zealand ..... Keith ZL3KEI

@ggggg4030 Год назад

I use my EFHW portable, so there is no ground rod available. What’s a fella to do?

@Art_64 Год назад

40/20/10 EFHW. You have no recommended length? Thanks