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Groundplane/counterpoise. Was: Re: How do you carry your 817 when portable, back pack or pelican case

VA7OTC John Erskine #106368 On 2018.02.26 2350, captrjbowen@... [FT817] wrote:> A question,,,, If a mobile mag mount uses the vehicle roof as a ground plane,,,,, It does, better or less per frequency in use. Would a length of braided copper grounding cable do the same thing ? Yes. So can copper tape. In other words, could a piece of braided copper grounding cable act as a counterpoise Yes. but substitute for a very long piece of wire ? eh? Configured how? What is visualised here? MF/HF or VHF+? Please no computer calculations and graphics that get into the weeds. Roger. ------------------------------------------------------------------------ Posted by: captrjbowen@... ------------------------------------------------------------------------ 73, John VA7OTC
R.J. Bowen All Messages By This Member #106369 开云体育 Reason I ask is that I want to use on sailboat. Tried last summer but not much for results. Vhf 2m ok with stock antenna. Wish to try this next summer with EFHW up mast vertically.? Usually I have it at home with tuner and EMCOMM 61 ft horizontal antenna andwith large awg cable to ground spike. Best, Rich W1GBB toggle quoted message Show quoted text -------- Original message -------- From: "VA7OTC John Erskine va7otc@... [FT817]" <FT817@...> Date: 2/27/18 03:21 (GMT-05:00) To: FT817@... Subject: Groundplane/counterpoise. Was: Re: [FT817] How do you carry your 817 when portable, back pack or pelican case ? On 2018.02.26 2350, captrjbowen@... [FT817] wrote:> > A question,,,, > If a mobile mag mount uses the vehicle roof as a ground plane,,,,, It does, better or less per frequency in use. > Would a length of braided copper grounding cable do the same thing ? Yes. So can copper tape. > In other words, could a piece of braided copper grounding cable act > as a counterpoise Yes. > but substitute for a very long piece of wire ? eh? Configured how? What is visualised here? MF/HF or VHF+? > Please no computer calculations and graphics that get into the weeds. Roger. ---------------------------------------------------------- > Posted by: captrjbowen@... ---------------------------------------------------------- 73, John VA7OTC
Mike-2007 #106371 开云体育 Here we go again. ? PEOPLE - a 61 ft antenna is not an EFHW.? It is a random wire!? It would be an EFHW at about the 16m band, and nowhere else. ? Although I know it is lost on many people, there is a difference between an End Fed Random Wire and an End Fed Half-Wave.? Unless you are transmitting on the 16m band, a 61 ft wire is not an EFHW. ? Vy73 -- Mike -- KD5KC. ? ? ? toggle quoted message Show quoted text From: FT817@... [mailto:FT817@...] Sent: Tuesday, February 27, 2018 01:47 To: FT817@... Cc: captrjbowen@... Subject: Re: Groundplane/counterpoise. Was: Re: [FT817] How do you carry your 817 when portable, back pack or pelican case ? Reason I ask is that I want to use on sailboat. Tried last summer but not much for results. Vhf 2m ok with stock antenna. Wish to try this next summer with EFHW up mast vertically.? Usually I have it at home with tuner and EMCOMM 61 ft horizontal antenna andwith large awg cable to ground spike. Best, Rich W1GBB ? -------- Original message -------- From: "VA7OTC John Erskine va7otc@... [FT817]" <FT817@...> Date: 2/27/18 03:21 (GMT-05:00) To: FT817@... Subject: Groundplane/counterpoise. Was: Re: [FT817] How do you carry your 817 when portable, back pack or pelican case ? ? On 2018.02.26 2350, captrjbowen@... [FT817] wrote:> > A question,,,, > If a mobile mag mount uses the vehicle roof as a ground plane,,,,, It does, better or less per frequency in use. > Would a length of braided copper grounding cable do the same thing ? Yes. So can copper tape. > In other words, could a piece of braided copper grounding cable act > as a counterpoise Yes. > but substitute for a very long piece of wire ? eh? Configured how? What is visualised here? MF/HF or VHF+? > Please no computer calculations and graphics that get into the weeds. Roger. ---------------------------------------------------------- > Posted by: captrjbowen@... ---------------------------------------------------------- 73, John VA7OTC
[email protected] #107836 Capt, ?Did you ever solve yoiur sailboat proplem... I owned a Hunter 25.5 for a while and wanted to operate on the Great Salt Lake.... living in Ogden, Ut. Sold the boat before I could play radio on the water.... I had a few thoughts about how I'd do it.... KA7MWQ Newt

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