[Amps] Uruguay Amp Project

[Patrick Barthelow]

Thanks Paul,

 

For your comments.

 

I wonder what is involved in revbuilding/rewinding a high voltage/high power transformer, say similar to what you find in a SB 220.  And how much/what kind of  damage happens when they fail.   

 

If you took the bells off a Heathkit cooked B+ transformer, I would bet you will find, melted plastic bobbins perhaps carbonized, interwinding layer paper that is scorched/burned, Perhaps carbon tracks on paper, plastic bobbins, or across core laminations.  Assuming you could get replacement bobbins, and suitable wire for the primary and secondary windings, would anyone with experience in these matters clue us in on whether in a pinch, in the wilds of South America, if it is a doable task, assuming wire and bobbins, and  suitable high temp paper and tape could be obtained?  Does anyone have any specs on the factory wire used in Heathkits, Kenwoods, Ameritron, Peter Dahl, etc, as to guage, and number of turns, length of each guage wire used, etc..,   I found a fair amount of theory and photos of the art of transformer winding on the web.


Best Regards,   
73, de Pat Barthelow AA6EG
 


Date: Fri, 7 May 2010 20:17:58 +0000
From: kg7hf at comcast.net
To: amps at contesting.com
CC: apolloeme at live.com
Subject: Uruguay Amp Project






Hi Pat,

 

A couple of ideas for you.  Firstly, my wife's uncle used to run a very successful motor rebuilding shop in Colombia.  Most of his work was for the commercial marine industry.  They built and rebuilt all sorts of motors, alternators, and transformers.  So you might check with a local motor rewinding ship, I'm sure they are still in existence there.


Secondly, there are some "other" ways to get things south without paying huge customs.  Ask around for a local hauler who makes trips north.  You might find a trucker who goes out of the country, who knows another who goes farther north, and yet another who goes farther north.   I know of cases where large goods i.e. refrigerators, TV's, etc have been hauled overland via the gray market truck drivers...all the way from Massachusetts no less.

 


Paul Decker (KG7HF)


------------------------------

Message: 3
Date: Fri, 7 May 2010 09:11:13 -0700
From: Patrick Barthelow <apolloeme at live.com>
Subject: [Amps] Uruguay Amp Project
To: <amps at contesting.com>
Message-ID: <SNT115-W81D66F5D38E2B4BF1CE37DFF60 at phx.gbl>
Content-Type: text/plain; charset="iso-8859-1"


Wow,
 
Thanks all for your helpful contributions.  
 
What a brain trust we have here on the reflector.
So, if anyone in SA  has an Amp, homebrew or otherwise that they want to fix, or even donate, or sell to this effort in Uruguay, please get in contact, with details.  


 		 	   		  
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