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All the original 1920s through the 1950s instruments used RF and had an average power output from about 40 to about 200 watts. This gas tube ismade of Pyrex and is a 2" inch round by 14" inch long Helium, Argon or Helium/Argon filled tube. Anyone who purchases the EM type of equipment should understand that they only output low audio frequencies and have no RF carrier frequency. All of these rheostats will have a slide adjustment to vary the value of resistance (or voltage when connected as a potentiometer) as necessary for the experiment.Also, these types of rheostats were available in many different values of total resistance and maximum current flow ratings.Wilson.) These large, adjustable wire-wound rheostat-potentiometers were generally used in college and university physics laboratories when performing experiments in electricity where fairly large currents were involved.
Otto Wolff, from 1900 to 1909, produced the Reichsanstalt-type of resistance standards used at the National Bureau of Standards (NBS.) At the turn of the last century, many precision measurements had to be calculated because the measurement couldn't be made directly since many of the instruments we take for granted today hadn't been developed.
Modern solid state circuitry uses low voltage, high current designs, to avoid the additional engineering and component costs involved in building the types of machines used in the 1930's and 1940's. And even with the advantages of vacuume tube design, it is still almost 00.00 less than other comparable plasma tube machines. Since they do not use an RF carrier frequency it is almost impossible to determine their power output.
It is designed to be able to produce the same types of outputs and frequencies that the original 1930s equipment did. The ability to produce a high voltage, low current output to drive the plasma tube makes the MOPA, coupled with the GB4000 frequency generator unique in the market. For the first time since the Ray Tube devices of the 1930s, the M. Due to the fact that they use EM to deliver the frequencies they are limited to about 10,000 Hertz but a few go to 30,000 Hertz.
Each junction slot can shunt the resistor selected by inserting the shunt-pin.
To select a R value one first has to know the total resistance of the box.
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One has to calculate the value that needs to be subtracted from 1100 to result in the value of R desired and then insert the shunt pins into the necessary junctions to have those values of R total the subtracted value.