[Boatanchors] Copper oxide rectifiers

[hwhall at compuserve.com]

I'm glad that I'm only going to be working the electronics part of the job. There will be some big challenges with some of the other stuff.
 

 Wayne



-----Original Message-----
From: rbethman <rbethman at comcast.net>
To: boatanchors <boatanchors at mailman.qth.net>
Sent: Wed, Aug 21, 2013 3:07 pm
Subject: Re: [Boatanchors] Copper oxide rectifiers

 
 
 
I have no specific evidence on this specific item. 
 
However, having been the Guinea Pig inside in the *EARLY* '60s, I can  
only say that there is going to be some *MAJOR* issues with ANY  
restoration of one of these antiques! 
 
Thay were old as heck even back then!  We in the CAP received one from  
the discarded items from the USAF at Eglin AFB, FL.  It was a royal PITA  
to keep running THEN! 
 
However, now being a certificated pilot, I'd love to own one and operate  
it it! 
 
Bob - N0DGN 
 
 
On 8/21/2013 5:59 PM, hwhall at compuserve.com wrote: 
> I do know the selenium ones are dangerous and would not consider leaving one  
in service, only "present" for appearances with a modern diode hidden somewhere  
to do the work. 
>    
> 
>   Wayne 
> WB4OGM 
> 
> 
> 
> -----Original Message----- 
> From: Brian Clarke <brianclarke01 at optusnet.com.au> 
> To: Roger Ruszkowski <flowertime01 at wmconnect.com>; Boatanchors  
<Boatanchors at mailman.qth.net> 
> Sent: Wed, Aug 21, 2013 2:56 pm 
> Subject: Re: [Boatanchors] Copper oxide rectifiers 
> 
>    
>    
>    
> I suspect you mean selenium rectifiers. There is no toxicology 
> associated with copper oxide, as far as I can discover. I may not have 
> searched far enough? 
>    
> 73 de Brian, VK2GCE. 
> ? 
> Brian Clarke 
> BE, MBA, PhD, CPEng, FIEAust 
> MD, Clarke & Associates P/L 
>    
> On Wed, 21 Aug 2013 16:37:23 -0400 (EDT), Roger said: 
>    
>   Wayne, 
>    
>   They may be usable still as your other posts replied. 
>    
>   If your restoration needs to look exact as original built, you have 
> little choice. 
>   If you just need function, then a modern diode bridge is in order. 
>   Copper oxide was popular between tube diodes and better silicon 
> diodes. 
>   But the magic smoke in copper oxide diodes is more toxic than the 
> magic smoke in silicon 
>   or germanium diodes. Thus copper oxide has fallen out of favor with 
>   some people. 
>    
>   Roger AI4NI 
>    
> ------------------------- 
> Email sent using Optus Webmail 
> 
 
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