Selenium rectifiers: Difference between revisions

Selenium rectifiers (view source)

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Revision as of 00:56, 5 September 2018 (view source) Peter (talk \| contribs) mNo edit summary ← Older edit		Revision as of 08:20, 11 September 2019 (view source) Mcguire (talk \| contribs) m (Fixed typo) Newer edit →
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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 ~~exepected~~ 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.		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.