Radio frequency television or radio transmission having first stage semiconductor preamplifier or second stage electronic tube with outer cooling enclosure both stages covering.

摘要

The high frequency signal amplifier has two series amplification stages. A first stage (200) is a semiconductor preamplifier and a second stage an electronic tube (100). There is an outer cooling enclosure (401) with cooling for both the preamplifier and the second stage, this cooling circuit preferably containing a mixture of water and an anti-freezing compound.