TYPICAL COAX CABLE LOSSES
  RG58C/U RG213 LMR400  
  MHZ Attenuation
 / 100 m.		 MHZ Attenuation
 / 100 m.		 MHZ Attenuation
 / 100 m.		  
  1 1.4 1 0.6 1 0.4  
  10 4.9 10 2 10 1.2  
  50 12.1 50 4.9 50 2.8  
  100 17.7 100 6.9 100 4.1  
  200 26.6 200 9.8 200 5.8  
  400 40.7 400 14.8 400 8.4  
  700 58.1 700 21.3 700 11.2  
  900 69.2 900 24.9 900 12.8  
  1000 74.8 1000 26.9 1000 13.5  
      4000 70.5 4000 28.8  
               
http://www.amphenolrf.com/images/invisi.gifhttp://www.amphenolrf.com/images/invisi.gif
CONNECTORS
          Type N Connectors    
               
Type  N  CONNECTOR            
               
  Type N Standard Specifications
  (Amphenol)
  Electrical            
  Impedance     50 Ω 
  Frequency Range     0 - 11 GHz
  Voltage Rating     1,500 volts peak
  VSWR     MIL-C-39012 straight connectors: 1.3 max 0-11 GHz
          MIL-C-39012 right angle connectors: 1.35 max 0-11 GHz
  Dielectric Withstanding Voltage     2,500 volts rms
  Insulation Resistance     5,000 MΩ minimum
  Center Contact Resistance     1.0 mΩ 
  Outer Contact Resistance     0.2 mΩ 
  RF Leakage     -90 dB minimum at 3 GHz
  Insertion Loss     .15 dB maximum at 10 GHz
               
  Note: These characteristics are typical but may not apply to all connectors.
               
There are two families of Type N connectors: Standard N
(coaxial cable) and Corrugated N (helical and annular cable). Their primary applications are the termination of medium to miniature size coaxial cable, including RG-8, RG-58, RG-141, and RG-225. RF coaxial connectors are the most important element in the cable system. Corrugated copper coaxial cables have the potential to deliver all the performance your system requires, but they are often limited by the performance of the connectors.
               
For more information, go to:          
http://www.amphenolrf.com/products/typen.asp?N=0&sid=4C5CA2006045E17F&#top  
               
PL-259 CONNECTOR
   TOTAL LOSS PER CONNECTOR  (dB)        
  FREQ (MHz) N type PL 259        
  1.8 0 0        
  30 0 0        
  100 0 0        
  150 0 0.01        
  200 0 0.015        
  450 0 0.09        
  600 0 0.13        
  900 0 0.33        
  1000 0.025 0.4        
  1300 0.5 0.43        
  1600 0.025 0.25        
               
Measured by Bob Schreibmaier K3PH, using  an HP8753 RF network analyzer.  
Full info from:              
  http://www.radiobanter.com/showthread.php?t=2550    
               
FOOTNOTES:              
1 Actual values may vary according to the quality of the parts, the quality   
  of the terminations, testing methods, etc.