[Top] [All Lists]

Re: [Amps] Uruguay Amp Project

To: <>, <>
Subject: Re: [Amps] Uruguay Amp Project
From: Patrick Barthelow <>
Date: Fri, 7 May 2010 14:25:55 -0700
List-post: <">>
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
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 <>
Subject: [Amps] Uruguay Amp Project
To: <>
Message-ID: <SNT115-W81D66F5D38E2B4BF1CE37DFF60@phx.gbl>
Content-Type: text/plain; charset="iso-8859-1"

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 

The New Busy is not the old busy. Search, chat and e-mail from your inbox.
Amps mailing list

<Prev in Thread] Current Thread [Next in Thread>