[R-390] Selenium rectifier replacement

Rbethman rbethman at comcast.net
Wed Dec 27 15:42:16 EST 2006


Roger, et al,

The four lug terminal strip and a home brewed bridge is what I will do.

Hank's offer is appreciated, and I wrote him directly with my thanks.

As I wrote to Hank:

    I am indeed doing a "restoration", but THIS is one part that I'll
    depart from "pure" restoration activities.

    I am not a youngster any longer.  Health considerations have become
    more important.  I may not be as old as many others, but I have to
    take care more than many of my same age.  A snoot full of a dying
    selenium rectifier just won't do.

    I'm going to solid state the bugger.

    Thanks for the note and offer!

So I will be opting for the SAFE method.

Thanks to Roger, Hank, AND the List!

Bob - N0DGN

Flowertime01 at wmconnect.com wrote:
> Bob,
>
> You just should not eat them when you get them out of the circuit.
>
> The real hazard is when they are letting the magic smoke out of them.
>
> You can wash the area up with soap and water after one fails.
> This cleans the mess up well.
>
> As always when working with lead solder, wash your hands before you lick your 
> fingers.
>
> The device is a simple bridge rectifier.
> A four lug terminal strip and a 1Amp 50 volt or more bridge will make up a 
> replacement.
>
> Mostly they just fail open then buzz a while as the output is only 1/2 wave 
> instead of full wave. The extra load on the working half then kills that half 
> and its over.
>
> Some really do smoke and burn. These are the ones not to watch and breath the 
> fumes from. The selenium is not easily adsorbed through the skin.
>
> But a bath on the lawn is likely in order before you install the new part.
>
> I like Hank's offer. It will look much nicer in the receiver.
>
> Roger AI4NI
>   

-- 
                            Bob - NØDGN
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