medium waves match antenna-transmitter 50ohm system

[tzitzikas]

i have an 500w medium waves transmitter (output 50ohm) at 1431khz. i have the components and i have decide to construct this http://www.tzitzikas.webs.com/match.JPG match system. it is ok? i must connect the power/swr meter before this system (between transmitter and match system) or after this system (between match system and antenna)? my antenna is an inverted L 5l/16 antenna.
do you have to propose any better system? thank you

 

[HiDef]

1431 KHZ you want vertical polarization for local coverage. Try using a vertical T or Marconi antenna. All the radiation is in the vertical portion where it does the most good. Inverted Ls work best for your situation when the horizontal portion doesn't radiate. When the L is changed to a T that happens.

Elevated resonant radials will make a huge difference. You can get away with 4 as opposed to several dozen needed if they are on the ground. The radials can be loaded if you do not have the room. No radials, no signal. They are important.

Coax out to feedpoint. Tuning unit right at feedpoint. The network will depend on the lengths of wire you put up. No one can tell you the answer until you tell them the wire lengths. When you do someone will have to model it.

 

[Beetle]

Connect the meter BEFORE the matching network. You may need an RF ammeter after the matching network to measure antenna current.

 

[tzitzikas]

my match Pi system http://www.tzitzikas.webs.com/match.JPG is ok or i must modificate this to LC match system? it is ok or i must remove the 1500pf capacitor and increase the the first capacitor and add constant capacitors to 500pf capacitor? thank you.

 

[HiDef]

No one can answer that until you come up with proposed lengths for the antenna.