Selenium Rectifier Siemans

Dec 03, 2008· Selenium rectifiers were made by stacked plates of aluminum or steel, one face covered by a thin layer of selenium and by a soft-metal counterelectrode. They could be damaged by excessive humidity or by corrosive atmosphere: however, in this case, the entire set should show severe trace of rust and corrosion.

Oct 03, 1972· In a method for producing a selenium rectifier, a thin base selenium layer is first placed upon a metallic carrier electrode. This base selenium layer is converted into a metal selenide layer by means

Feb 03, 2012· Notice the silicon rectifier is mounted right on top of the old selenium. Notice also there are no wires connected to the old selenium rectifier. it's just sitting there.

Siemens small parts and components, pn and description Or visit our small parts/components section for more parts 3138922 6000MF, 350V, CAPACITOR & RESISTOR 6571934 E PROMS SET 25070101 PROM 0283069 CAPACITOR 0405423 RECTIFIER SET / BOARD 0431163 RECTIFIER VI, SELENIUM-MILANO 0452508 …

Siemens Schuckertwerke AG Siemens AG ... A process for the preparation of selenium rectifiers whose top electrode thallium is added in a small amount :

Nov 29, 2015· The common way to replace a Selenium Rectifier with a Silicon one is by putting a resistor in series with the DC-out-lines to reduce the output voltage - whi...

Selenium bridge rectifier B25C1800 25V 1800mA 1,8A . Power supply for field coil speaker and heating tube preamp and RIAA corector. Made in Bulgaria before 1989 under a Siemens license

Find best value and selection for your HONDA C100 SELENIUM RECTIFIER search on eBay. World's leading marketplace.

Dec 13, 2003· I got my Scott LK72B tube int. amp. Discussion in 'Audio Hardware' started by floyd, Dec 11, 2003.

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.

Selenium rectifier testing ? in ... > > Single element rectifier > > Siemens lazy S logo ... > I agree with the other posters that you can replace the selenium with a

All Semi-Conductors are new and sold As-Is. All sales final. ... Siemens Zener, 9v, ... IR Selenium Rectifier, Harris P/N: ...

The selenium rectifier had a short-circuit which had made a temperature fuse open, so I used silicon diodes and a glass fuse instead. I got rid of 100 Hz hum with the help of an additional electrolytic capacitor plus a 1 H filter choke.

VINTAGE SIEMENS SELENIUM Bridge Rectifier B30C600 for FISHER 500C Tube & others - $45.77. 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 …

Find best value and selection for your 5 new pont de diode Vintage SIEMENS Germany SELENIUM RECTIFIER B250 C125 search on eBay. World's leading marketplace.

Jan 21, 2009· Single element rectifier Siemens lazy S logo Made in Germany ... a copper oxide or selenium rectifier, ... Selenium rectifiers …

Sep 22, 2005· Can someone tell me a little about selenium ... Old Time Selenium Rectifiers - Can someone explain ... You simply replace them with a suitable silicon rectifier ...

selenium rectifier catalog no. rectifier division, bloomington, indiana . tarzi trimmers rectifiers tuners qv1510n . created date: 12/6/2009 5:04:58 pm ...

Dec 03, 2008· Selenium rectifiers: how to preserve them ... I've had to re-wire a functionning rectifier (Siemens ... I also have a Grundig 4192 with a selenium rectifier …

Convention suggests that a 1N4007 diode be used (with or without a resistor) to replace a selenium rectifier. What are the pros/cons, etc. of using a bridge rectifier, of equal values, rather than the diode?

A selenium rectifier is a type of metal rectifier, invented in 1933. ... were observed by Braun, Schuster and Siemens between 1874 to 1883.

All tubes are Siemens branded (pict.39) and have been tested and found to perform not at the top, but within allowed margins, including the rare early version of the magic eye tube EM80. The line voltage was switched to 110V (not 125V) in order to boost the rectified voltage, still generated by the original Siemens Selenium rectifier B250C150.

Cougar Electronic is producing standard and custom design selenium rectifier & Selenium Supressor.Still commonly used in industrial application, do not hesitate to send your design for any quotation.

Hi Omer,<P>Bridge rectifiers are "full wave" rectifiers and put out a different waveform than a single diode "half wave" rectifier.<P>Although the output from a full wave rectifier requires less filtering (and therefore smaller capacitors) than one for a half wave rectifier, in the old days, rectifiers were expensive.

Dec 07, 1998· I have seen a number of posts recently about replacing selenium rectifiers, both her and in the antiques group. It is always a good idea to do this

There are 3 of them the schem states they are 1 - 250ma selenium rect. and 2 - 75 ma selenium rect.

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.

selenium rectifier datasheet, cross reference, circuit and application notes in pdf format.

Nov 21, 2007· Selenium rectifier testing ? Discussion in 'Electronic Repair' started by N Cook, Nov 19, 2007.

A selenium rectifier is a type of metal rectifier, invented in 1933. 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.

Selenium rectifier testing ? [Repair] - Adras. Single element rectifier Siemens lazy S logo Made in Germany ... The original selenium rectifier has a rather ... > There is a greater voltage drop across selenium.

Mar 30, 2005· I concur with Paul regarding silicon over selenium, for rectification. However, my computations tell me that the selenium rectifier in the Opus 55 is functioning at 95%. For a fifty year old, that's pretty darn good! The last three Opus 7's I worked on in the last few months, all had selenium rectifiers that were working at 80% - 85% of spec.

Selenium Rectifier / Metal Rectifier queries - Google … Jan 21, 2009· Single element rectifier Siemens lazy S logo Made in ... This suggests that selenium rectifiers were just one type of ... a copper oxide or selenium rectifier…

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.

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 …

selenium rectifier stacks SIEMENS Adjustable Transformer Signal Rectifier (HT Series) model 1222X shown for reference purposes only! Actual unit selected may vary in ...

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 ...

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.