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Selenium rectifiers: Difference between revisions
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Some classic Tek gear uses '''selenium rectifiers'''. It is recommended that these be replaced with modern silicon rectifiers. A problem however is that the original circuits were designed based in the voltage drop | Some classic Tek gear uses '''selenium rectifiers'''. It is recommended that these be replaced with modern silicon rectifiers. A problem however is that the original circuits were designed based in the voltage drop expected across a selenium rectifier, which is much more than the voltage drop across a silicon rectifier, therefore simply replacing the selenium part with a silicon part can result in an overvoltage situation. There are many solutions to this. | ||
* One approach is to add a "dropping resistor" in series with a silicon rectifier. The resistance is selected to have a voltage drop that that compensates for the change in rectifiers. | * One approach is to add a "dropping resistor" in series with a silicon rectifier. The resistance is selected to have a voltage drop that that compensates for the change in rectifiers. | ||