A loop around the fouse might work if the house is made of wood and two or three stories high.
----- Original Message -----
From: Jim Shaffer <[log in to unmask]>
To: [log in to unmask]
Date: Saturday, July 12, 2014 11:38 am
Subject: loop antenna was: Huge disappointment!
>
>
> Just a reminder to try to keep the subject accurate. I honestly don't read
> all the emails on this list, but I will look when a new subject comes up.
> I've always been interested in loops, although I never had one, and don't
> have the wherewithall to put one up now, except I guess I could perhaps
> string up something on the side of the house. I wonder if anyone has used a
> house-shaped loop, with a peaked roof and all? Lol.
> --
> Jim, KE5AL
> -----Original Message-----
> From: Dr. Ronald E. Milliman
> Sent: Saturday, July 12, 2014 12:35 PM
> To: [log in to unmask]
> Subject: Re: Huge disappointment!
>
> Butch, how does your loop work on 40, 30, 20, 17, 15, and 10 meters? Have
> you tried it on 144 or 440?
>
> Ron, K8HSY
>
>
> -----Original Message-----
> From: For blind ham radio operators [mailto:[log in to unmask]]
> On Behalf Of Butch Bussen
> Sent: Saturday, July 12, 2014 11:52 AM
> To: [log in to unmask]
> Subject: Re: Huge disappointment!
>
> Just coax. Works just fine. I did add a coax transformer which improved
> its performance a lot on 75 meters. I just tie shield to one side and
> center to the other. The transformer is a quarter wave stub of rg6, figured
> for 3.900 mhz. Brought the swr down from 2.5 to 1.4 on 75.
> Magic!!!
> Loop really kicks butt on 160.
> I personally don't like voltage balluns. I actually gutted a w2au one for
> my 75 dipole we just put up and made just a center insolator out of it. I
> suspect my 9500 would have fried that ballun.
> 73
> Butch
> WA0VJR
> Node 3148
> Wallace, ks.
>
>
> On Sat, 12 Jul 2014,
> Dr. Ronald E. Milliman wrote:
>
> > Butch, you said you didn't have a ballun on your 160 loop; so, what
> > are you feeding it with, e.g. 52 ohm coax, open wire feedline or what?
> >
> > Ron, K8HSY
> >
> >
> > -----Original Message-----
> > From: For blind ham radio operators
> > [mailto:[log in to unmask]]
> > On Behalf Of Butch Bussen
> > Sent: Saturday, July 12, 2014 7:17 AM
> > To: [log in to unmask]
> > Subject: Re: Huge disappointment!
> >
> > This is a dumb question, but is there a chance you have the cables mixed
> up?
> > Just a thought. BTW, different opinions on feeding loops, but I do
> > not have a ballun on my 160 loop.
> > 73
> > Butch
> > WA0VJR
> > Node 3148
> > Wallace, ks.
> >
> >
> > On Fri, 11 Jul 2014, John Miller wrote:
> >
> >> I now wonder what was used to seal the coax at antenna ends, I hope
> >> it wasn't anything that might have had the wrong action.
> >> ----- Original Message -----
> >> From: "Colin McDonald" <[log in to unmask]>
> >> To: <[log in to unmask]>
> >> Sent: Friday, July 11, 2014 9:59 PM
> >> Subject: Re: Huge disappointment!
> >>
> >>
> >>> yep, a standard dual band type antenna will show a short on an ohm
> >>> meter across the feed point/coax that is connected...
> >>> same with a balun.
> >>> I would have thought maybe the balun is bad on the 80 meter loop,
> >>> but because both coaxes are showing a short, I think it has to be
> >>> connecters or coax if it's old or has been seriously damaged during
> >>> installation.
> >>> A serious excersism is in order me thinks.
> >>>
> >>> 73
> >>> Colin, V A6BKX
> >>>
> >>> --------------------------------------------------
> >>> From: "Butch Bussen" <[log in to unmask]>
> >>> Sent: Friday, July 11, 2014 5:28 PM
> >>> To: <[log in to unmask]>
> >>> Subject: Re: Huge disappointment!
> >>>
> >>>> First thing to do is check coax with an ohm meter and see if you
> >>>> show a short. Some antennas do and I usually check this out before
> >>>> just so I know. You obviously have a short on the loop likely the
> >>>> coax. Who soldered those and did they check after soldering?
> >>>> Stupid question I know. Also, I am not sure if the dual band would
> >>>> show a short or not, but I'd check it. SLimple thing to try is
> >>>> redo the connector on the bottom end, easy to do and if you're
> >>>> lucky, that may be where the problem is. Good luck.
> >>>> 73
> >>>> Butch
> >>>> WA0VJR
> >>>> Node 3148
> >>>> Wallace, ks.
> >>>>
> >>>>
> >>>> On Fri, 11 Jul 2014, Dr. Ronald E. Milliman wrote:
> >>>>
> >>>>> I was so excited. Last night I told my wife, Palma, that I felt
> >>>>> like a kid on Christmas Eve in anticipation of finally getting the
> >>>>> guys over this morning to help me get my antennas up. Well, the
> >>>>> fellows from the local ham club came over early this morning, and
> >>>>> we got busy working on all the little details in preparation for
> >>>>> erecting my antennas, the Dual Band vertical for
> >>>>> 144 and 440 and the full-wave, 80 meter loop. We drilled holes in
> >>>>> the foundation and wall for my coax and ground wire, got the loop
> >>>>> attached to the pulleys and the vertical on top of the mast.
> >>>>> Finally, it was time to hoist up the mast and position it in the
> >>>>> wall bracket and secure the base.
> >>>>> Then, the time came to connect the coax fittings and check it out
> >>>>> with the antenna analyzer. Much to everyone's shocked and massive
> >>>>> disappointment, we got SWR readings of 25 to 1, and even 31 to 1,
> >>>>> which is as high as the meter would go. That is when the sick
> >>>>> feeling developed in my stomach. What greatly exacerbated the
> >>>>> situation is that we got almost equally high SWR readings on both
> >>>>> coaxial feedlines. Just to see what would happen, I connected the
> >>>>> loop to my TS-590, and tuned across 20 meters and could hear
> >>>>> nothing. I started unscrewing the coax fitting from my rig, and as
> >>>>> I did, the noise level in my TS-590 got really loud and then,
> >>>>> dropped back to very low. That is when I discovered that if I
> >>>>> completely unscrewed the outer shell ground side of the PL259 and
> >>>>> just kept the center conductor plugged into the antenna input
> >>>>> jack, that the noise level remained quite high, and as I tuned
> >>>>> across the band, I could hear several signals, still not what I
> >>>>> would expect, but I could hear signals. As soon as I screwed the
> >>>>> outer ground shield on the antenna jack, the radio went almost
> >>>>> completely dead again. Sounds like something is shorted somewhere,
> huh?
> >>>>>
> >>>>>
> >>>>>
> >>>>> To have one antenna system not work is one thing, but to have both
> >>>>> of them not work is almost beyond chance. So, the guys left, and I
> >>>>> still don't have any operational antennas. I'm not sure what we
> >>>>> are going to do, but I think we need to do two things: One is to
> >>>>> disconnect the coax from the ballun I have connected to the loop
> >>>>> and connect a dummy load to the coax and see what it shows on the
> >>>>> SWR meter, and second, connect the antenna analyzer directly up to
> >>>>> the ballun which is connected to my loop and see what it shows us.
> >>>>> Those steps will help us isolate the problem. As for the vertical,
> >>>>> I don't know what to do with that one because it is way up on the
> >>>>> top of the mast, and it was one hell of a job getting that mast
> >>>>> erected up and in place.
> >>>>> It
> >>>>> took five guys to do it, and it was all they could do to keep it
> >>>>> under control while they worked it up and in place.
> >>>>>
> >>>>>
> >>>>>
> >>>>> So, guys and gals, it will be a little longer before K8HSY is up
> >>>>> and operational on the ham bands.
> >>>>>
> >>>>>
> >>>>>
> >>>>> 73,
> >>>>>
> >>>>> Ron, K8HSY
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>> Dr. Ronald E. Milliman
> >>>>>
> >>>>> Retired Professor of Marketing
> >>>>>
> >>>>> President: A3 Business Solutions (a3businesssolutions.com)
> >>>>>
> >>>>> President: M&M Properties
> >>>>>
> >>>>> Chair: American Council of the Blind's PR Committee
> >>>>>
> >>>>> Chair: American Council of the Blind's MMS Committee
> >>>>>
> >>>>> President: South Central Kentucky Council of the Blind (SCKCB.ORG)
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>
> >>
> >
> >
|
