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selenium rectifier replacement

how to replace a selenium rectifier with a diode YouTube

Jan 05, 2016 sears silvertone console stereo repair part something

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BY RICH BONKOWSKI, W3HWJ REPLACINGSELENIUMRECTIFIERS

ment. Two small selenium “stacks” could easily replace a type 80 or 5Y3 vacuum tube rectifier in many circuits. Since each plate of the selenium stack could support about 30 volts, you will typ-ically find 5 or 6 plates in a 120 Vrms rectifier. Tube rectifiers need filament power to ther-mally stimulate electron flow. The 5Y3, for exam-

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Replacing selenium rectifier with diode Gearslutz

May 10, 2014 The (2) 1N4007 silicon diodes with their cathodes tied together (and a single series resistor) will replace the single, dual anode selenium rectifier, as long as the finale DC output current is less then 2 amps. Just be sure the final DC output voltage winds up being what the circuit was designed for.

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Problem with replacing selenium rectifier All About Circuits

Sep 01, 2019 A bridge rectifier built of discrete diodes will take up far less space than even one selenium rectifier. And if any service would be needed in the future there are many silicon diodes that would be work as substitutes. And, if the circuit is a half-wave voltage doubler, the change would be even simpler, and only require one diode.

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Replacing a selenium rectifier Antique Radio Forums

<P>The purpose of the resistor is to drop same voltage that gets dropped by the selenium rectifier. A silicon diode will drop 0.7v while the selenium rectifier may drop anywhere between 5 and 20 Volts (or more) Measure the drop is a good starting point but keep in mind it might not be accurate as it tends to drop more as it ages (I guess that's why they overheat and burn)<P>Experiment by

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How do I replace this 40+ year old selenium rectifier

Jun 14, 2004 One side of the selenium rectifier will be marked with a plus (+). The new rectifier will replace the old one, but the striped end goes to where the + end of the selenium was. By process of elimination, the unstriped end goes to where the other selenium rectifier lead was. The selenium rectifier should be discarded.

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Selenium Rectifier To Diode Replacement Help Antique Radios

Post subject: Selenium Rectifier To Diode Replacement Help. Posted: May Sat 09, 2020 10:45 pm . Member: Joined: Feb Mon 17, 2020 5:23 am Posts: 25 Location: Barron Co., WIS. Hey everyone! Just got done repairing this 1959 Bradford 100 record player and just tested it and it's new resistors and capacitors. After playing it for a bit the audio

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Always, always, always replace the bias selenium rectifier

Dec 23, 2014 As a matter of course the selenium rectifiers should be replaced in all Dynaco amps with a diode on a terminal strip as you suggested in an earlier post on this forum. The only minor thing that could happen is that in some amps after a change from the stock selenium rectifier to a diode the bias range will change somewhat.

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SELENIUM RECTIFIER CEHCO

We are selenium rectifier replacement specialist. In fact, the company can assemble and deliver any selenium rectifier in 48 hours or less. And the stacks contain extremely high-quality, high-density, vacuum-processed cells to ensure uniformity, stability, and

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Replacing a selenium rectifier Antique Radio Forums

<P>The purpose of the resistor is to drop same voltage that gets dropped by the selenium rectifier. A silicon diode will drop 0.7v while the selenium rectifier may drop anywhere between 5 and 20 Volts (or more) Measure the drop is a good starting point but keep in mind it might not be accurate as it tends to drop more as it ages (I guess that's why they overheat and burn)<P>Experiment by

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Problem with replacing selenium rectifier All About Circuits

Sep 01, 2019 I've experimented with selenium rectifiers and even burned one. I disassembled it and found many square elements. You can simulate selenium diodes with high-voltage silicon diodes. They also consist of a series of sequentially connected diodes and many volts fall on them. The higher the voltage diodes, the greater the voltage drop. See 2CL69

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Replacing A Selenium Rectifier With A Silicon Diode

Jun 25, 2019 I am working on a 1970 CT70 and the selenium rectifier is missing. Is there a Radio Shack substitute? Two Wire Selenium Rectifier Replacement. Discussion in 'General' started by antiqueynot, Aug 8, 2013. Today I got the RS 276-1661 diodes recommended by John for this application and will install according to directions in the excellent.

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How do I replace this 40+ year old selenium rectifier

Jun 14, 2004 One side of the selenium rectifier will be marked with a plus (+). The new rectifier will replace the old one, but the striped end goes to where the + end of the selenium was. By process of elimination, the unstriped end goes to where the other selenium rectifier lead was. The selenium rectifier should be discarded.

More

Replacing Selenium Rectifiers in TON Trans-Oceanics

Replacing Selenium Rectifiers in TON Trans-Oceanics All the miniature tube Trans-Oceanics, from the G500 to the B600, were equipped with selenium rectifiers instead of the traditional tube rectifier. Selenium rectifiers are notorious for failing gradually over time. Their forward voltage drop increases to the point that the tubes stop working.

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Selenium Rectifier To Diode Replacement Help Antique Radios

Post subject: Selenium Rectifier To Diode Replacement Help. Posted: May Sat 09, 2020 10:45 pm . Member: Joined: Feb Mon 17, 2020 5:23 am Posts: 25 Location: Barron Co., WIS. Hey everyone! Just got done repairing this 1959 Bradford 100 record player and just tested it and it's new resistors and capacitors. After playing it for a bit the audio

More

Always, always, always replace the bias selenium rectifier

Dec 23, 2014 The selenium rectifiers were unreliable and Selenium can be a poison if large amounts are ingested and a skin irritant if is comes in contact with the skin. As a matter of course the selenium rectifiers should be replaced in all Dynaco amps with a diode on a terminal strip as you suggested in an earlier post on this forum.

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Changing selenium rectifier to silicon diode

selenium rectifier and through a 15 ohm, 5 watt W.W. resistor. After replacing the selenium rectifier with the silicon diode, what value resistor do I need to replace the 15 ohm resistor to maintain the correct voltage? E-mail O.K.

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Selenium Full-Wave Bridge Rectifier Testing

Selenium Full-Wave Bridge Rectifier Testing Drawn by Jon Pardue 2007 Updated 2013 Selenium Full-Wave Rectifiers 3-wire Ground connection Earth connection (minus) battery terminal Negative battery terminal Chassis ground Cathode Warning: Do NOT breathe the smoke from a failing rectifier. Evacuate the area. Selenium is toxic. In England its

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What is a Selenium Rectifier? (with picture)

Feb 04, 2021 The selenium rectifier rose to prominence when vacuum tube rectifiers failed to provide the sufficient amount of amperes of electrical current needed to charge the batteries on automobiles. A notable advantage of the selenium rectifier was the ability of the user to stack more plates to increase the device's voltage endurance.

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Selenium rectifier Wikipedia

A selenium rectifier is a type of metal rectifier, invented in 1933. [citation needed] They were used in power supplies for electronic equipment and in high-current battery-charger applications until they were superseded by silicon diode rectifiers in the late 1960s.The arrival of the alternator in some automobiles was the result of compact, low-cost, high-current silicon rectifiers.

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Selenium Rectifier Radiomuseum

Mar 30, 2005 Replacement of a selenium rectifier . In prinziple (for others): If you don't know the consumption (Amps.) you have to know either by the schematic or often you can read the ratings of the old rectifier. In any case you need to know the current you want to rectify.

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Is there any danger in replacing a Selenium rectifier with

May 10, 2016 This claim seems totally unfounded to me. On the contrary, aging selenium rectifiers sometimes develop high reverse (leakage) current and replacing them with modern s.s devices will actually lower the load on the transformer and preserve the filter caps from high a.c ripple current. If the replacement diodes are correctly rated in P.I.V and forward If current for the application I can't see

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Replacing a selenium rectifier Antique Radio Forums

<P>The purpose of the resistor is to drop same voltage that gets dropped by the selenium rectifier. A silicon diode will drop 0.7v while the selenium rectifier may drop anywhere between 5 and 20 Volts (or more) Measure the drop is a good starting point but keep in mind it might not be accurate as it tends to drop more as it ages (I guess that's why they overheat and burn)<P>Experiment by

More

Replacing Selenium Rectifiers in TON Trans-Oceanics

Replacing Selenium Rectifiers in TON Trans-Oceanics All the miniature tube Trans-Oceanics, from the G500 to the B600, were equipped with selenium rectifiers instead of the traditional tube rectifier. Selenium rectifiers are notorious for failing gradually over time. Their forward voltage drop increases to the point that the tubes stop working.

More

Replacing A Selenium Rectifier With A Silicon Diode

Jun 25, 2019 I am working on a 1970 CT70 and the selenium rectifier is missing. Is there a Radio Shack substitute? Two Wire Selenium Rectifier Replacement. Discussion in 'General' started by antiqueynot, Aug 8, 2013. Today I got the RS 276-1661 diodes recommended by John for this application and will install according to directions in the excellent.

More

REPLACEMENT SELENIUM SURGE SUPPRESSOR SPECIALIST

replacement selenium rectifier specialist; replacement selenium surge suppressor specialist; ac to dc unregulated power supplies; igbt power supplies-air cooled; obsolete 4/20 ma converter card; 5000 amp dc rectifier air cooled, p/n 6037c1; 5000 amp dc rectifier water cooled, p/n 6037c2;

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How do I replace this 40+ year old selenium rectifier

Jun 14, 2004 One side of the selenium rectifier will be marked with a plus (+). The new rectifier will replace the old one, but the striped end goes to where the + end of the selenium was. By process of elimination, the unstriped end goes to where the other selenium rectifier lead was. The selenium rectifier should be discarded.

More

Selenium Rectifier To Diode Replacement Help Antique Radios

Post subject: Selenium Rectifier To Diode Replacement Help. Posted: May Sat 09, 2020 10:45 pm . Member: Joined: Feb Mon 17, 2020 5:23 am Posts: 25 Location: Barron Co., WIS. Hey everyone! Just got done repairing this 1959 Bradford 100 record player and just tested it and it's new resistors and capacitors. After playing it for a bit the audio

More

Selenium rectifier Wikipedia

A selenium rectifier is a type of metal rectifier, invented in 1933. [citation needed] They were used in power supplies for electronic equipment and in high-current battery-charger applications until they were superseded by silicon diode rectifiers in the late 1960s.The arrival of the alternator in some automobiles was the result of compact, low-cost, high-current silicon rectifiers.

More

Is there any danger in replacing a Selenium rectifier with

May 10, 2016 This claim seems totally unfounded to me. On the contrary, aging selenium rectifiers sometimes develop high reverse (leakage) current and replacing them with modern s.s devices will actually lower the load on the transformer and preserve the filter caps from high a.c ripple current. If the replacement diodes are correctly rated in P.I.V and forward If current for the application I can't see

More

Selenium rectifiers (Barry L. Ornitz)

Remember that selenium rectifiers have a much greater forward voltage drop with current than do silicon diodes. Thus when you replace a selenium diode with a silicon diode, expect a higher voltage out of your circuit. For most selenium stacks, the DC output is about 2 volts less than the RMS input voltage multiplied by the number of plates.

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WELDER POWER SUPPLY REPLACEMENT POWER DIODES

The diodes are embedded in an aluminum plate to assure electrical and thermal conductivity. Air flow is channeled over and through the assembly to assure thermal stability. This is a very compact assembly that makes it an ideal unit to retrofit older machines and as a replacement for selenium rectifiers.

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Hallicrafters S-120 Gets a Refresh Mike Yancey

Jun 08, 2017 The selenium rectifier was replaced with a modern 1N4007 diode and a series 200 ohm, wire-wound resistor. The modern diode has quite a bit less voltage drop than the old selenium, and the resistor compensates to keep all the internal voltages ‘pretty close’ to what’s on the schematic.

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After Class: Working with Selenium Rectifiers, September

Mar 10, 2021 Per Wikipedia, "A selenium rectifier is a type of metal rectifier, invented in 1933. They were used to replace vacuum tube rectifiers in power supplies for electronic equipment, and in high current battery charger applications. The photoelectric and rectifying properties of selenium were observed by C. E. Fitts around 1886 but practical

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Selenium Rectifier & Suppressor Cougar Electronics Corp.

Like a silicon diode, when an alternating current is applied to a selenium rectifier in series with the load, half of the AC cycle is blocked and the load receives a pulsating direct current. by using two or more rectifiers in an appropriate center tap or bridge circuit, both halves of the AC cycle may be rectified !

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Help replacing selenium rectifier on Scott 299 Technical

Feb 03, 2012 Before I continue I would like to replace the selenium rectifier. I have read some were that once replaced with a better more efficent rectifier I would need a resistor to drop the load. 1st question how do I know the values of the rectifier, according to the schematic alls it says is something about -55v next to it.

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