With these basic types innumerable combinations can be developed. One calls such tubes compound tubes. Here are some examples:

             

Radio tubes are not differently developed. They are simply larger, thicker and so built that they are well cooled. Electrons, which hit the anode in large quantity and large speed, can develop substantial heat. In specialized group A you can see an example of a radio tube, in the anode holes are burned out.
For achievements to approximately 3 KW Luftkuehlung. Noch larger transmitter tubes is sufficient with water in the cycle is cooled.

End the conclusion still another word for the advantage of the tube opposite the transistor:

In transistorisierten equipment the operational data must be kept exactly. Take e.g. an amplifier stage, the high frequency into the antenna send. Thus a transmitter output stage. If this output stage consists of transistors and are only completely briefly exceeded e.g. with co-ordinating the operational data, then the transistor goes irrevocably defectively. With a tube output stage the anode becomes about red-hot, but nothing continues to pass. After the correction the tube can be problem-free further used.
(one must insert special protective circuits with transistors, thus that not happened).

So: now you became already almost a tube specialist. If you regard the specialized groups A to C now, read the associated remarks and you will probably also find:

So much mental and property relating to crafts was put into the tube technology that it is unfortunate to throw away tubes simply.

Our museum is grateful for each suggestion concerning tubes.

If you should be a tube collecting tank, we are gladly ready to help you.