[NJARC] Selenium Rectifier replacement

[Sal Brisindi]

You should put a resistor in series with the silicon diode as the B+ will be higher when replacing the selenium diode.

Sal

-----Original Message-----
From: "Matt Reynolds" <mattr04 at hotmail.com>
Sent: ‎4/‎15/‎2016 5:10 PM
To: "NJARC Reflector" <njarc at mailman.qth.net>
Subject: Re: [NJARC] Selenium Rectifier replacement

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   I'm probably the least knowledgeable\qualified person on this thread thus far when it comes to radio repair but I was always under the impression the resistor was added to the diode to help account for the differences in how the selenium rectifier works\"acts" in relation to the silicon diode replacement.  It was my understanding the resistor was not added to protect the diode, but the resistor was to protect "the radio" from being "harmed" by the different characteristics of the silicon replacement.  I don't ever think I've heard of fear of the modern part being damaged/burnt out.

Matt

________________________________________
From: NJARC <njarc-bounces at mailman.qth.net> on behalf of Raymond F Chase <raydio862 at verizon.net>
Sent: Friday, April 15, 2016 4:35 PM
To: 'David Sica'; 'Jim Whartenby'; njarc at mailman.qth.net
Subject: Re: [NJARC] Selenium Rectifier replacement

Just remember
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Reply All = Everyone

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The predominant failure modes for silicon diodes are: 1. Overheating the
junction by gross current overloads and 2: Exceeding the peak inverse
voltage (PIV) rating.  Silicon diodes with 10 times the expected current
rating and several times the PIV cost pennies so they will be the last to
fail.
Ray

-----Original Message-----
From: NJARC [mailto:njarc-bounces at mailman.qth.net] On Behalf Of David Sica
Sent: Friday, April 15, 2016 4:03 PM
To: Jim Whartenby <antqradio at sbcglobal.net>; njarc at mailman.qth.net
Subject: Re: [NJARC] Selenium Rectifier replacement

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Reply = Poster
Reply All = Everyone

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