Kenwood TS-480 - Manual (Page 40)

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Now let’s have a look at the rise in temperature of the different parts when the TS-480HX transmits
continuously (14MHz) for 30 minutes at 200W. To provide a comparison, plotted on the same
graph is test data compiled for a compact 100W model (designed so as not to power-down during
continuous transmission at 100W).
Fig. 30: Temperature rise around final transistors
Fig. 31: Temperature rise of die-cast aluminum chassis around GND terminal on rear