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Cougar Electronics Corp. was founded in 1968 and bought the General Instrument Selenium Rectifier Division. The company has manufactured Selenium Rectifiers since that time originally in Brooklyn, NY and now in New Haven, CT.
Jan 11, 2018· Selenium Rectifiers were basically the first solid state rectifier to replace Vacuum Tube Rectifiers. In a nut shell it is a stack of plates with Selenium that can turn AC into DC. By today's standards you should not use Selenium Rectifiers and use Silicon Diodes or if possible if it's a Vacuum Tube device then use a Vacuum Tube Rectifier.
Phil's Old Radios Stars In A Movie! In late summer, 1999, I was contacted by a production company making a TV movie for CBS. Starring John Ritter and Marg Helgenberger, the plot would involve one of the characters researching old radio parts—specifically, selenium rectifiers—on the …
Oct 01, 2019· The selenium rectifier mentioned is in series with the modulated B+ going to the final. Its purpose is to prevent the 6146 plate voltage from going negative at any point in the modulation cycle. It can be replaced by a single 1N5408 or similar diode. No need for dropping resistors or similar. N2EY, Oct 1, 2019. #4.
Selenium CAS-No. Revision Date 2007 -07 -01 SARA 311/312 Hazards Acute Health Hazard, Chronic Health Hazard Massachusetts Right To Know Components Selenium CAS-No. Revision Date Selenium
Selenium Rectifier Tester 710 Equipment Jackson The Electrical Instrument CO., Dayton, build 1953 ?, 4 pictures, 7 schematics, United States of America
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. You should count number of plates connected in series and calculate area of plate.
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.
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 …
Find here listing of selenium rectifiers manufacturers, selenium rectifiers suppliers, dealers & exporters offering selenium rectifiers at best price. Get wide range of selenium rectifiers offered by listed companies in India.
Jun 05, 2018· All of the transformers from the 50's and probably the 60's (e.g. Scintilla, Marnold, MRC) used selenium rectifiers. Some of the O scale transformers from that era have massive rectifiers. These "vintage" folks do run their equipment as it was done in the past, no DCC, older style coupers, etc.
Sarkes Tarzian high voltage selenium rectifiers are designed for use in photo-flash supplies, cathode ray oscilloscopes, television re- ceivers, high potential test equipment, and electronic equipments used by military forces. Designated as Type O for current ranges to …
Jun 18, 2020· Antique Radio Forums Index » Category » Test Equipment and Tools Discussions. All times are UTC [ DST] Selenium Rectifier replacement SG-8 : Page 1 of 2 [ 34 posts ] Go to page 1, 2 Next Previous topic | Next topic : Author Message; Codepug
Jul 03, 2021· This selenium rectifier problem is not confined to these older control circuits in Kohlers and such. In my garage, I have an old Miller welder, about 55 years of age, that has all its rectifiers of the selenium variety. It is a 300amp unit, and the main rectifiers have to …
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. We make customized selenium rectifiers as per the size of plates required and for the capacity required.
Sep 07, 2021· You'll still find lots of these in old equipment. Sometimes you'll smell them too, and if one blows up while you're working in the panel the vile smell will...
Burlington, ON Distributor* $1 - 4.9 Mil 1991 10-49. Distributor of selenium rectifiers. Available as DC type high voltage selenium rectifiers with voltage ratings from 90 VDC to 675 VDC. Selenium rectifiers are available in current ratings from 3 A to 904 A. High voltage selenium rectifiers are used in electronic braking & crane applications.
605207 Associated DC Cable Set. Add. 602101 Associated 500 Amp Positive Clamp Assembly. Price $26.74. Add. Browse for more products in the same category as this item: Battery Charger Parts > Associated Battery Charger Parts Listing By Model > 6001 SERIAL NUMBER 00001-20939 Associated Battery Charger Parts List.
Jun 17, 2020· Re: Selenium rectifier replacement. usually Miller welders are 208-230-460 or 230-460-575. The manuals do not reflect this all the time. The welder data plate is the only way to tell what the primary voltage of a welder IS. Placement of the jumpers is different for both.
Jul 04, 2017· Since modern diodes have a lower voltage drop then selenium rectifiers, a series resistor may have to be a consideration. However, as Tom said, "if it works" I have selenium rectifiers in several pieces of equipment that have been working since the beginning of time and show no signs of failure, fatigue, smell, etc.
DC Power Supplies. Cougar Electronics is a full service provider for DC power supplies. We supply the plating industry with SCR and switchmode power supplies. We sell new and refurbished equipment. We can repair, upgrade and refurbish any outdated plating rectifier. We also offer on-site repairs, spare parts and preventive maintenance.
While correcting these problems, we inspected the electrical equipment (insulators, power supply units), replaced the selenium rectifiers with diode rectifiers, and cleaned de- posited dust from the electrodes, the inside surfaces of the precipitators, and the dust-dis- posal equipment. Electronic Reliability in the Field.
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.The arrival of the alternator in some automobiles was the result of compact, low-cost, high-current silicon …
Selenium dioxide is the major compound produced when a selenium rectifier is overheated. It can cause severe burns to the mucous membranes and severe respiratory tract, skin, and eye irritation. It is also a dermal sensitizer in that it can promote allergic reactions. Fortunately it is not consider a carcinogen. Another fortunate thing is the ...
CEHCO provides SCR and Diode Rectifiers for a variety of applications that includes anodizing, water treatment, general metal finishing, crane duty, electrochemical applications and the latest development in the power conversion technology. All our units are custom-built per specification. Over 200 parts are available for review.
Rectifier devices. Before the development of silicon semiconductor rectifiers, vacuum tube thermionic diodes and copper oxide- or selenium-based metal rectifier stacks were used. With the introduction of semiconductor electronics, vacuum tube rectifiers became obsolete, except for some enthusiasts of vacuum tube audio equipment.For power rectification from very low to …
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Oct 25, 2016· The selenium rectifier replaced the vacuum tube rectifier in the period 1950 onward and was in use until the 70's. Selenium rectifiers are recognizable by the cooling fins, which are often painted green or orange. We were given a three-phase selenium rectifier, taken from an ancient Honda 150 motorcycle.
This catalog describes and illustrates selenium rectifiers used in 1950s and 1960s electronics. It includes information on theory and fabrication, circuit designs, and servicing information. Federal's Selenium Rectifier Handbook, 2nd Edition (1953) (44.89 ) Jefferson Electric Company
Power Management Electronics. We have been developing power management electronics products since 1953, when we developed a selenium rectifier for motorcycles. Since then, we have centered on development and sales of regulators/rectifiers and CDIs (capacitor discharge igniters) for motorcycles. We have also expanded to develop general purpose ...
May 27, 2012· What is wrong with selenium rectifiers in old tube equipment? Reply to Thread. Discussion in 'Electronic Design' started by [email protected], May 24, 2012. Search Forums; Recent Posts; Scroll to continue with content. May 24, 2012 #1. Guest. In this article for antique 1955 to 57 Zenith tv set, a guy says to
Buy Qty 1 IRC Selenium Rectifier E075L 130V 75mA Vintage NOS Package in Vaudreuil-Dorion, Quebec, Canada, for US $9.50. Qty 1 IRC Selenium Rectifier E075L 130V 75mA. New old stock (NOS) item. Original package with some shelf wear.