RADIO TRANSMISSION SYSTEM FOR TELEVISION 



637 



reduced dielectric and eddy current losses and consequently toward 

 higher antenna efficiency. The resulting improvement may be ex- 

 pected to more than compensate for the slight loss in the line, which 

 should not exceed 3 per cent. Removing the field from the building 

 is equally advantageous in that it simplifies the precautions which 

 normally have to be taken to prevent the radio-frequency energy 

 from affecting the performance of audio amplifiers and other supple- 



Fig. 3 — Television transmitting apparatus in the studio at Whippany 



mentary vacuum tube apparatus. The most serious disadvantages 

 arise from the fact that the antenna must be tuned and the current 

 in it measured at a point remote from the transmitting apparatus 

 proper. 



In spite of the fact that the station building was not directly under 

 either antenna, some difficulty was anticipated from radio-frequency 

 fields produced within the transmitting equipment due to the relatively 

 high amplification employed with the photoelectric cells. In order to 

 minimize trouble of this nature a special shielded studio was con- 



