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1955 Siemens Kammermusik Schatulle M57 AllWave Radio

1.) replacing the original and still perfectly working Selenium rectifier B250C150 by a modern Si diode bridge rectifier plus a 40Ω power resistor in series (please ask for details). 2.) replacing some of the original Siemens tubes by selected tubes with better performance.

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SELENIUM RECTIFIER CEHCO

Selenium rectifier stacks are made up of selenium cells, which are mounted together and circuited as required for each application. They are available in configurations to suit all of the rectifier circuits. CEHCO is a leader in supplying selenium rectifier stacks. We are selenium rectifier …

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Replacing a selenium rectifier Antique Radios

Post subject: Replacing a selenium rectifier. Posted: Jul Sat 30, 2005 11:19 am . Member: Joined: Jan Thu 01, 1970 1:00 am Posts: 12623 ... Replacing those with fullwave silicon bridge units makes a lot of sense.

Siemens and other German companies seemed to have a good inexpensive process to manufacture those bridge rectifiers in the 1950s ...

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SIEMENS SELENIUM RECTIFIER B30 C600 b and RDE 2200uf 40V ...

Find best value and selection for your SIEMENS SELENIUM RECTIFIER B30 C600 b and RDE 2200uf 40V CAPACITOR Germany search on eBay. World''s leading marketplace.

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Help with grundig majestic stereo need selenium rectifiers

Help with grundig majestic stereo need selenium rectifiers : Page 1 of 1 [ 15 posts ] Previous topic | Next topic : Author ... your specific set uses a Siemens B250 C150, selenium bridge rectifier, rated 250V 150ma. ... Help with grundig majestic stereo need selenium …

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Vintage Siemens West Germany Selenium Rectifier full wave ...

Vintage Siemens West Germany Selenium Rectifier full wave 390V 100mA Tested: 40. Vintage Siemens full waveSelenium Rectifier. Rectifier marked B390 C100. Used for 390V at 100mA (tested)The rectifier looksnice. No at the pictures for details. If …

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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 ... Jump to content. Technical/Modifications; The Klipsch Audio Community. Existing user? Sign In . ... Help replacing selenium rectifier on Scott 299 Sign in to follow this . Followers 0. Help replacing selenium rectifier on Scott 299.

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Selenium Rectifier Suppressor | Cougar Electronics Corp.

SELENIUM POWER RECTIFIERS. A selenium rectifier is an electronic component that permits free passage of electric current in one direction, but almost completely blocks the flow of current in the opposite direction.

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HHScott Vacuum Tubes Replacing Selenium Bridge Rectifiers

Replacing Selenium Bridge Rectifiers. Some vintage H. H. Scott gear typically uses a selenium "stack" bridge rectifier for the preamp''s DC filament supply and the negative grid bias supply for the output tubes, sometimes referred as the "Csupply".

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selenium rectifier | eBay

See more like this 31700001602 Selenium Rectifier CA100 Supercub CA105T Trail 55 ... VINTAGE SIEMENS SELENIUM RECTIFIER E60 C170 E60C170 60V 170mA p/n eF 2448. Brand new. ... + £ postage; See more like this HONDA CL90,CS90,S90,SL90 RECTIFIER SELENIUM 4 WIRES JAPAN. From Malaysia; VINTAGE SIEMENS SELENIUM ...

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Selenium rectifier testing ? | Electronics Forums

Nov 21, 2007· Single element rectifier Siemens lazy S logo Made in Germany 2250c50 Kc 11/16 Nov 19, 2007 2. mike Guest. N said: In a valve Dansette Bermuda of early 60s Been in a loft for years. ... The original selenium rectifier has a rather substantial forward voltage drop. The design of the filters and the rest of the receiver

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Old Time Selenium Rectifiers Can someone explain them ...

Sep 22, 2005· Selenium rectifiers are allso semiconductor devices but amorphouse. In old days we used to say taht each plate of rectifier can whithstand about 30V of reverse voltage and that each square centimeter of it''s surface can whitstand 100mA of current.

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Selenium Wikipedia

The first commercial products using selenium were developed by Werner Siemens in the mid1870s. ... Though once widely used, selenium rectifiers have mostly been replaced (or are being replaced) by siliconbased devices. The most notable exception is in power DC surge protection, ...

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Selenium Rectifier

Mar 30, 2005· On the topic of retaining a selenium rectifier, it probably is a really good idea to replace it with silicon diodes. I am not a chemist but I understand that when a selenium rectifier fails it can release toxic gas, and retaining a selenium rectifier adds unnecessary risk for the power transformer.

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BY RICH BONKOWSKI, W3HWJ …

Typical selenium rectifiers. BY RICH BONKOWSKI, W3HWJ 3568 SOUTHRIDGE DR., SANTA, ROSA, CA 95403. to find,, though they are still made in India. Don’t bother buying a new old stock (NOS) selenium unit. It will be at least 50 years old and already wellaged toward failure.

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Selenium rectifier siemans

siemens selenium rectifiers for fisher 500c and others Offered is one used Siemens 30 volt 600 mA selenium rectifiers, each pulled from two different working Fisher 500C receivers that were rebuilt, with part of that rebuild involving replacement of these for silicon.

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Selenium rectifier Wikipedia

A selenium rectifier is a type of metal rectifier, invented in 1933. ... Schuster and Siemens between 1874 and 1883. ... Selenium rectifiers have a long but not indefinite service life of 60,000 to 100,000 hours, depending on rating and cooling.

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Conversion of Selenium Rectifier to Silicon Diode(s) | EM ...

Conversion of Selenium Rectifier to Silicon Diode(s) Share this! By minnesota13 5 years ago. Topic Stats. ... I have this big honker of the selenium rectifier that is eating up 3VDC and passing 8VAC. The output is supposed to be 16VDC but is measuring 13VDC. ... The rectifier is at the Red 1. There is a circuit breaker (Red 2) do you think ...

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Selenium Rectifier Voltage Drop | Electronics Forums

Jul 11, 2003· I am restoring an older tube short wave radio that contains a selenium rectifier for the high voltage power supply. I''ve replaced it with a silicon diode, however the lower voltage drop of the diode requires an

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Alternative Way to replace a Selenium Rectifier YouTube

Nov 29, 2015· The common way to replace a Selenium Rectifier with a Silicon one is by putting a resistor in series with the DCoutlines to reduce the output voltage which however is …

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