BY RICH BONKOWSKI, W3HWJ REPLACINGSELENIUMRECTIFIERS

device commonly found in vintage electronic equipment—mfe. S elenium rectifiers are often found in TVs, amplifiers, and test equipment dating from ... Typical selenium rectifiers. BY RICH BONKOWSKI, W3HWJ 3568 SOUTHRIDGE DR., SANTA, ROSA, CA 95403. to find,, though they are still made in India.

Amplifier Restoration - vintagetubeaudio

The filter caps were shot and the coupling caps to the outputs were leaky, the selenium rectifiers were very weak (only -10 volts of bias) and last, but not least, the input tube electrolytic's and bias cap electrolytic's were leaky and off value. The customer 's goal …

how to replace a selenium rectifier with a diode - YouTube

Jan 05, 2016· Mix - how to replace a selenium rectifier with a diode YouTube Replacing Selenium Rectifiers in Tube Portable Radios - Duration: 6:16. AllAmericanFiveRadio 24,028 views

Selenium rectifier danger! - SmokStak

Aug 01, 2016· Selenium rectifier danger! I have noticed in several posts, references to selenium rectifiers in these vintage generators. I think it prudent to …

Vintage Siemens Selenium Bridge Rectifier B30C600 for ...

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.

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

What's It Worth: Early Components — Rectifiers ...

Selenium rectifiers. One of the more interesting rectifiers was used after World War II. Developed in the 1930s, the selenium rectifier contained a stack of several steel or aluminum plates coated with bismuth or nickel, with a thicker layer of selenium and a halogen element added.

2- Marantz Model 7 preamplifier selenium rectifiers ...

As you know, the low voltage and high voltage selenium rectifiers are essential to keeping the classic sound of the Marantz Model 7 preamplifier. No silicon rectifier can come close to the selenium rectifier in conveying the true timbre of music. Please advise via email if interested in the purchase of more than one Marantz selenium rectifier set.

Power Supply Stages - UK Vintage Radio Repair and Restoration

Power Supply Stages. ... only counterparts as may be seen by looking at the specifications of receivers made by the well known firms of the vintage years. ... Always use a pair of series resistors to limit current when replacing old selenium rectifiers with silicon diodes. Diodes are 20% more efficient.

After Class: Working with Selenium Rectifiers, September ...

Selenium is another one of those elements/compounds that are essential for life, but can kill you in too large of a quantity (like water). See also After Class: Working with Selenium Rectifiers, The Semiconductor Diode, New Selenium Rectifiers for Home Receivers, Selenium Rectifiers, and Using Selenium Rectifiers.

Selenium Rectifier - Radiomuseum.org

Mar 30, 2005· The selenium rectifier, pn AEG B250C150K4, had to be replaced. ... Thank you so much for the excellent explanation of the use of the silicaon diodes for the bridge rectifiers for our vintage radios. ... About selenium rectifiers, it is easy to calculate the …

Selenium Rectifiers - Canadian Vintage Radio Society

Dec 05, 2018· The diagram shows a 10 MA Selenium rectifier at the transformer going to a rheostat that probably controls the voltage to the tested tube socket. Am I understanding the set up correctly? Now. Is it practical to change it or is it incorporated within the transformer.

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

Conversion of Selenium Rectifier to Silicon Diode(s) Share this! By minnesota13 4 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 ...

Selenium Rectifier Replacement - Google Groups

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 ... how bad a selenium rectifier can smell when it is overheated or ... Can you give me an example of any vintage tube amp using

Tarzian Selenium Rectifier Model 108d Nos Nib Vintage Old ...

Tarzian Selenium Rectifier Model 108d Nos Nib Vintage Old Radio Part: $5. Ge Mobile Radio Part 19d437544g3 Frequency Synthesizer. Ge Mobile Radio Part 19d900701g2. Arbitrary Scale Meter New Old Stock Ge 19a116729p1. Nos General Electric Ge Mobile Radio 4ef41a10 Tx …

Antique Radio Forums • View topic - Selenium rectifier ...

You can test the selenium rectifier for voltage drop. An easy way is using a DC power supply. Connect positive of the power supply to AC input on the selenium rectifier. Connect a load on the output of the rectifier. 5P1 is fairly small so use a 75 ma load. Measure voltage dropped across the selenium rectifier.

Vintage Schematic Questions | Electronics Forums

Jan 02, 2018· Vintage Schematic Questions Reply to Thread. Discussion in 'Datasheets, Manuals and Component Identification' started by KilgoreCemetery, Dec 22, 2017. ... Be careful replacing selenium rectifiers with modern silicon diode rectifiers because the forward voltage drops are quite different... about 0.7 V for silicon diodes and several volts to a ...

Old Time Selenium Rectifiers - Can someone explain them ...

Sep 22, 2005· Old Time Selenium Rectifiers - Can someone explain them? Thread starter Rnktapp; Start date Sep 21, 2005; R. Rnktapp New Member. Sep 21, 2005 #1. ... 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 ...

selenium rectifier | eBay

Find great deals on eBay for selenium rectifier and selenium diode. Shop with confidence.

What are the ratings of vintage Selenium Rectifier B20/16-2,4?

The old selenium rectifiers had significant resistance, and sometimes the circuit relied on that, like to limit inrush. These rectifiers were usually limited to the power supply, so taking a measurement of the power supply voltage or otherwise inferring it would be useful.

Vintage Federal Selenium Rectifier 206D529 NA27 for Sale ...

Vintage Federal Selenium Rectifier 206D529 NA27: $1. Up for sale is a vintage Federal Selenium Rectifier... Rectifier is in good looking condition but untested... If I told you I knew what this was for I would be fibbing... Part is offered as is... Rectifier is offered with a $.99 start price, ...

Rectifier - Revolvy

Jan 13, 2015· Selenium rectifier topic. 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.

Scott 299 B - Restoration | Steve Hoffman Music Forums

Aug 31, 2011· Scott 299 B - Restoration. Discussion in 'Audio Hardware' started by babylux, Sep 25 ... diodes for the old selenium rectifier. Vintage tube amps were not designed with MC cartridges in mind. You would need to also purchase a separate MC ... The electrolytic capacitors and selenium rectifiers should be replaced at bare minimum before you even ...

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 "C-supply".

Selenium Rectifier | eBay

Vintage Selenium Rectifier diode - 2 two pcs lot - steampunk radio TV part NOS. $9.50. Buy It Now. Lot of TWO pieces, blue selenium rectifier. Parts have been tested good. Unknown specs. Selenium Rectifier 250 ma, Mallory PN 6S250, Olson PN X-186, NOS. $15.00. Buy It …

Tweed Tremolux--Replacing Selenium Rectifier | Telecaster ...

Oct 11, 2012· The selenium rectifier is in fact a diode, or series of diodes. Often found on older electric model transformers, and old motorcycles. They're fairly robust, category of if it ain't bust don't fix it, but can short out (bad!) or go open circuit.

Vintage Siemens Selenium Bridge Rectifier B30C600 for ...

Vintage Siemens Selenium Bridge Rectifier B30C600 for FISHER 500C Tube & others: $30. 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 ...

Selenium rectifier - Wikipedia

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 rectifiers - BuyCheapr.com

help sylvania selenium rectifier; part#ecg119/vintage part; selenium rectifier color boost 800prv band is k; ... Write a review on selenium rectifiers. Your opinion is important to us! Let us know what you think by writing a review about this product. WRITE A REVIEW ©2009-2019 BuyCheapr.com.

Selenium rectifier danger! - Page 2 - SmokStak

Aug 02, 2016· Yeah, selenium rectifiers were the popular "solid state" rectifier to get around 5U4 and other high vacuum rectifiers. As a teen, I was given a Korean(?) war vintage US Army 12v/28v power supply/battery charger for tanks, trucks, radio's etc. (Larger than the early Litton Microwave ovens.)