DIRECTIVITY STEERING FOR FADING REDUCTION 



205 



vals, which fell below the average output level by any prescribed 

 amount. A photograph of this equipment is shown in Fig. 11. 



Fig. 11 — Field strength recorder and fading counters used 

 for fading reduction studies. 



Results 



Cathode ray tube observations of selective and also general fading 

 were made on the British Post Office stations GBW and GBU using 

 wobbled carrier. Whenever possible, these observations were made at 

 half-hourly intervals. For record purposes, arbitrary numbers ranging 

 from to 4 were adopted. Zero meant very little fading (five per 

 minute or less) and the most severe cases were represented by 4. These 

 figures were recorded separately for the standard antenna and for the 

 rhombus. The difference between the numbers assigned to each an- 

 tenna gave an indication of the fading reduction accomplished. 



