Two Good Days Spent with Quads
			 
			 
			
		
		
		
			
			 
Of course I will be trying this next idea even if no newsgroup answer is 
forthcoming:  What happens if I tap off  quad #1 on the side _opposite_ 
where I'm feeding it and connect quad #2 there?  Wouldn't this additional 
load reflect back to feed #1 and lower its impedance toward 50 ohms?  I 
don't know what feed #2 would be.  Perhaps a jury-rig parallel line 
calculated to be 100 ohms would do it. (# 10 AWG wires on 5 mm centers would 
do it.)  Phasing will be an issue. 
[I probably don't have a suitable test environment to tell success from 
failure.] 
 
73, 
"Sal" 
 
 
It is easier and cheaper to do phasing/matching harnesses with open 
wire. Make it, don't buy it. Considering that a 1/4 wave is only about 
19 inches you can make experiments with whatever wire is handy using 
popsicle sticks ("craft sticks" at the craft store) and masking 
tapefor the spacers.  
 
Make a field strength meter with a diode and dipole connected to a 
multi meter. space it about 30 feet in front of the quad. While 
transmitting verify the elements are all working by touching each 
element with a screwdriver.  
 
Operate the transmitter at lowest possible power. 
 
Too much fancy equipment gets distracting. 
 
John Ferrell W8CCW 
"Life is easier if you learn to  
plow around the stumps" 
		 
		
		
		
		
		
		
		
		
	
	 |