He can built the most of the tube with what he has, but he needs platinum to make some parts of the power tube, and it must also be sealed in a vacuum.
42.
Lyon gave up the FM license after several years because the equipment, especially the power tubes, was quite expensive and there were few FM receivers ( thus listeners ) at that point in time.
43.
The 1x10 " Vibrolux amp remained a tweed amp until it was upgraded in 1961 to a single 12 " speaker powered by a duet of 6L6 power tubes and a larger output transformer.
44.
Since they are now in space and getting power from the power beam station he built in Ganymede, he starts running down the comet so he can finish the power tube and call for help.
45.
But the relatively small output and the naturally higher frequencies of the EL84 power tubes often lead the Model One and Model Two to be used for studio recording, practice or performance in a smaller setting.
46.
A secondary board provides the base onto which the tube sockets are mounted ( although the pair of power tube sockets are mounted directly on the chassis with long leads connecting those to the secondary board ).
47.
The coupling of the phase inverter and power tubes is also important, since certain types of coupling arrangements ( e . g . transformer coupling ) can drive power tubes to class AB2, while some other types can't.
48.
The coupling of the phase inverter and power tubes is also important, since certain types of coupling arrangements ( e . g . transformer coupling ) can drive power tubes to class AB2, while some other types can't.
49.
A blown speaker appears as an open or infinite resistance to the tube power amplifier and can " fry " expensive components in the amp, such as the output transformer or power tubes, which would then need to be replaced.
50.
Although the RCA 6L6 of 1936 ( the result of a license agreement between RCA and M-OV ) was the first true " beam power tube " on the market, the later KT66 became almost equally famous, at least in Europe.
