Hi all: 

I'm just going over a backup antenna plan should my FT-450 don't tune my G5RV. 
Rather than try and unload my station components, as you wouldn't get near to what you pay for equipment when its new, likewise the G5RV, I thought about converting it to a 40M loop antenna. 
So to do this, would it only be to add the appropriate length of wire to close up the antenna legs, turning it into a triangle, with the ladder line feeding one corner. 
I could mount the loop on its side. One corner on the tower, the other on the standoff, about 7 feet off the ground just out side the shack window and the third corner to the tree where my windoms long leg is now tied. 
Again about 7 feet off the ground. The feed point of the loop would be about 50 feet.  
So I'd have a triangle with the measurements of 51 per side with a 38.56 foot base. Taking the formula of 1005 and dividing it by the frequency of 7.150 for the middle of the 40M band  minus the 102 feet of G5RV.
I'd have to give up 80M but according to a Gentleman on the FT-450 group, I'd have an antenna that would cover 40M/6M, including 30M, which the 450 would have no problems in tuning. 
I really won't mind giving up 80 as I've pretty much worked all I could hear anyway with my setup, which stretches from the midwest of North America to western europe and Africa. To really work some vary long hall DX, I'd have to have some kind of directional array plus power. 
I purchased this antenna because I needed approximately 100 feet of new coax and my home brewed windom was starting to come apart and I figured I by a commercial product ready to go up on the tower with no hassles. 

73: 

Michael De VO1RYN