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Old 11-18-2018, 08:35 PM
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Dubis7 Dubis7 is offline
Alchemizes cash to tubes
 
Join Date: Nov 2014
Location: Leesburg, VA.
Posts: 397
Quote:
Originally Posted by Electronic M View Post
The original re rectifier was SELENIUM, and your 1n4004 is silicon. Silicon rectifiers date back to the 60s and unless subjected to over voltage, over current, or something else that exceeds specs will last pretty much indefinitely.
selenium dates back to the 30s was phased out in the 60s typically looks like a square plate tuning capacitor and let's out a stinky toxic smoke when it eventually burns out.
My mistake. I meant to type selenium, but must've made a typo. Oddly, mine has the original selenium rectifier still electrically connected, but also has a later diode in parallel with it that isn't listed on the schematic. I figure the selenium must've failed at some point and they bypassed it. I'll be disconnecting both and replacing them with a 1N4004 and dropping resistor.
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