Mike, I do not believe, and my experience backed up, the counterpoise (I run 2 35' wires as counterpoise) prevented the feed line from radiating. I do believe the direct ground I ran in addition to the counterpoise reduced the common mode current, as well as the many chokes I run, and the lightning arrestor I run close to my shack. I also saw a marked difference by bonding the station ground rods (I run 2 4 foot ground rods about 6 feet apart just off of and below my station at the closest place I can get them in the ground), I run large gauge, pvc coated, grounding wire the 40 feet or so to my utility ground. I also have an 8' ground sunk at the base of my mast system, and that is also bonded to the utility ground about another 30 feet from the utility ground. That ground is where I run the UnUn, as well as the ground bonded to the mast. I expect the coax still radiates some, but it is reduced since the current on braid of the coax is interrupted by the lightning arrestor before it gets to my shack, and any that does make it back to the radio is bled to the station ground.
Ron KE4DRF On Thu, Jan 28, 2021 at 1:14 PM Gary Sitton via BVARC <[email protected]> wrote: > Mike, I have just started using it and have no idea > what the pattern looks like. It's probably a mix of > horizontal and vertical polarization with a medium > angle of radiation. I also suspect that the highest > power is broadside to the wire as most are. The > noise level is not bad and the signal levels seem > to be fairly good also. I just wanted an antenna > with 40 meter capability for shorter skip QSOs. > > 73, Gary > > On 1/28/2021 12:47 PM, Michael Giannaccio via BVARC wrote: > > Thanks Gary! > > I had that antenna on my list as well. I'd love to know what kind of > radiation pattern you think you might have. > > > > -- > 73, > > Mike Giannaccio > KI5LFZ > > > On Thursday, January 28, 2021, 11:23:39 AM CST, Gary Sitton via BVARC > <[email protected]> <[email protected]> wrote: > > > Mike: > > I just installed a MyAntenna EFHW 40-10-2K wire antenna. I chose > the 40 to 10 model as I do not use 160 or 80 meters. It is hung in an > inverted V configuration: the center at 30' and ends at about 10' from > the ground. The total length was about 63' and the final SWR was less > than 1.5:1 on the the phone bands except for 10 meters where it was > 2:1. The modeI got was designed for 1.5 KW peak and seems to be > of excellent construction. There is a 7:1 UNUN included in the package > but I did not examined it. I would be glad to discuss any other details. > > 73, Gary K5AMH > (713) 305-6765 > > 1/28/2021 9:45 AM, Michael Giannaccio via BVARC wrote: > > Does anyone have any experience with this product: > https://palomar-engineers.com/ferrite-application-experts-2/Bullet-End-Fed-500-1500-Watt-Antenna-1-8-61-MHz-55-203-FT-p74356626 > > Or this product: > https://www.hyendcompany.nl/antenna/multiband_40201510_m/product/detail/2/HyEndFed_4_Band_Black_Clamp_MK3#prod > > > An end fed antenna is the best fit for my property. I can easily run the > 71 foot model as either an inverted L sloper or as a regular sloper. The > highest point will be 18-20 feet and the low point will be around 6-7 feet. > > I have a few questions about this antenna as well making a DIY 20 meter > delta loop. If anyone is willing to give me a few minutes of your time to > pick your brain off this thread that would be much appreciated. > > > > -- > 73, > > Mike Giannaccio > KI5LFZ > > ________________________________________________ > Brazos Valley Amateur Radio Club > > BVARC mailing > [email protected]http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org > > > -- > Gary Sitton, K5AMH > [email protected] > SDR/DSP Consultant, > "Have FFTs, Will Travel." > ________________________________________________ > Brazos Valley Amateur Radio Club > > BVARC mailing list > [email protected] > http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org > > ________________________________________________ > Brazos Valley Amateur Radio Club > > BVARC mailing > [email protected]http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org > > > -- > Gary Sitton, K5AMH > [email protected] > SDR/DSP Consultant, > "Have FFTs, Will Travel." > ________________________________________________ > Brazos Valley Amateur Radio Club > > BVARC mailing list > [email protected] > http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org >
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