Half Wave Dipole Resonants Lengths
| 
       TABLE
      1: Antenna Frequency
      (MHz)  | 
    
       resonant
      lengths m
      (492/f)  | 
    
       End
      correction (approx.
      5%)  | 
    
       m
      resonant length (468/f)  | 
  |
| 
       1.825  | 
    
       269ft 
       6in  | 
    
       13ft  2in  | 
    
       | 
    
       256ft  5in 
          (78.21m)  | 
  
| 
       1.900  | 
    
       258ft  11
      in  | 
    
       12ft  6in  | 
    
       | 
    
       246ft  4in      
      (75.12m)  | 
  
| 
       3.525  | 
    
       139ft 
      7in  | 
    
       6ft   11
      in  | 
    
       | 
    
       132ft  9in    
        (40.5m)  | 
  
| 
       3.650  | 
    
       134ft 
      9in  | 
    
       6ft 
       6in  | 
    
       | 
    
       128ft  3in
             (39.llm)  | 
  
| 
       7.020  | 
    
       70ft   1
      in  | 
    
       3ft 
       6in  | 
    
       | 
    
       66ft  8in       
       (20.33m)  | 
  
| 
       10.125  | 
    
       48ft 
       7in  | 
    
       2ft 
       5in  | 
    
       | 
    
       46ft
       3in 
              '(14.1m)  | 
  
| 
       14.050  | 
    
       35ft  0in
        | 
    
       1ft 
       9in  | 
    
       | 
    
       33ft  4in
               (10.16m)  | 
  
| 
       14.200  | 
    
       34ft   8in  | 
    
       1ft 
       9in  | 
    
       | 
    
       32ft  llin       
       (10.05m)  | 
  
| 
       18.100  | 
    
       27ft 
       2in  | 
    
       1ft 
       4in  | 
    
       | 
    
       25ft
       l0in      
          (7.89m)  | 
  
| 
       21.050  | 
    
       23ft 
       4in  | 
    
       1ft 
       2in  | 
    
       | 
    
       22ft  3in
               (6.78m)  | 
  
| 
       21.200  | 
    
       23ft 
       3in  | 
    
       1ft 
       2in  | 
    
       | 
    
       22ft  1
      in       
       (6.73m)  | 
  
| 
       21.300  | 
    
       23ft 
       1 in  | 
    
       1ft   2in  | 
    
       | 
    
       22ft  Oin        
       (6.7m)  | 
  
| 
       24.940  | 
    
       19ft
         9in  | 
    
       1ft  Oin  | 
    
       | 
    
       18ft  9in
                (5.72m)  | 
  
| 
       28.050  | 
    
       17ft 
       6in  | 
    
       Oft  11
      in  | 
    
       | 
    
       16ft  8in
               (5.09m)  | 
  
| 
       28.400  | 
    
       17ft 
       4in  | 
    
       Oft   10.
      in  | 
    
       | 
    
       16ft  6in        
        (5.03m)  | 
  
| 
       29.500  | 
    
       16ft 
       8in  | 
    
       0 ft
      lOin  | 
    
       15ft
       l0in       
         (4.84m)  | 
  |
Source “ Radcom” Tech Topics Dec 2007