High-Frequency Structure of 3c 154

The structure of the source 3C 154 at 2695 MHZ and 8085 MHz is compared with its structure at 327 MHz obtained with the Ooty occultation telescope. It is found that the fraction of the total flux in a central compact component of the basic triple source increases with frequency and reaches nearly 40 percent at 8085 MHz. There is some indication that the fraction in central components may be increasing in fainter triple sources.