"Desmoface" wrote in message
...
Hey kids, it's finally on the air..My electrician ran my coax and the
loop is up and running..She's cut for 75/80 and I originally came up
with about 260 ft of wire but I must have measured wrong cause she
show's the lowest swr of ~1.7 to 1 at around 3650..my calculations
showed it should have been around 3850...

Steve,

I had about the same results with my loop. I ended up whacking off about 5
feet after I put it up, and a year later whacked off another 5. There is
some confusion as to what the length should be. Also, several people on this
newsgroup say that if you use insulated wire, you need to make it shorter. I
am using #14 stranded, insulated copper wire.

I wonder where you are feeding it. I started out with the bottom center, and
later changed it to a bottom corner. This gives me both horizontal and
vertical polarization, and no sag in the wire due to the weight of the coax.
EZNEC showed this to be slightly better. I have the center conductor of the
coax going to the vertical wire.

Tam/WB2TT

Hi Tam, I'm feeding it at a corner. It's situated horziontally so its
horizontally polarized...The difference on paper and actual operation is about
15 feet for me...After the winter's passed I may go out and start pruning the
wire a bit..I was originally aiming at 3750/The middle of the band so it looks
like if I trim off about 8 ft that should do it...We'll see...Thanks again for
the info..

Steve
kb8viv

Steve,

I had about the same results with my loop. I ended up whacking off about 5
feet after I put it up, and a year later whacked off another 5. There is
some confusion as to what the length should be. Also, several people on this
newsgroup say that if you use insulated wire, you need to make it shorter. I
am using #14 stranded, insulated copper wire.

I wonder where you are feeding it. I started out with the bottom center, and
later changed it to a bottom corner. This gives me both horizontal and
vertical polarization, and no sag in the wire due to the weight of the coax.
EZNEC showed this to be slightly better. I have the center conductor of the
coax going to the vertical wire.

Tam/WB2TT

Steve,

I had about the same results with my loop. I ended up whacking off about 5
feet after I put it up, and a year later whacked off another 5.

Tam, sounds like your loop is situated vertically?? What did you use for a
feedline? Did you use a balun? What was the lowest swr you obtained?? Thanks
again..

Steve
kb8viv

Steve,

Yes, it is mounted vertically. Not a true square, since the two tree
branches at 75 feet are only 65 feet apart. So, it is a trapezoid, with the
bottom wire about 80 feet long. Feeding a corner with a 1/4 wave section (at
3800) of RG11 75 Ohm coax. This goes into about 100 feet of LMR240. SWR at
the shack end of the 240 is about 1.1:1 at resonance. SWR on 40 and 17
meters is about 5:1. but my Ameritron amp with a Pi network output will load
up OK on both bands. I just keep the power down to 600W or so. I am looking
at replacing the RG11 with a 2.25:1 transformer.

Tam/WB2TT
"Desmoface" wrote in message
...
Steve,

I had about the same results with my loop. I ended up whacking off about
5
feet after I put it up, and a year later whacked off another 5.

Tam, sounds like your loop is situated vertically?? What did you use for a
feedline? Did you use a balun? What was the lowest swr you obtained??
Thanks
again..

Steve
kb8viv

Also, several people on this
newsgroup say that if you use insulated wire, you need to make it shorter. I
am using #14 stranded, insulated copper wire.


Typical insulated wire should be shortened by about 5%.

Yuri