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Re: [Amps] Uruguay Amp Project

To: <>, "'Patrick Barthelow'" <>, <>, "'Jorge Diez - CX6VM'" <>
Subject: Re: [Amps] Uruguay Amp Project
From: "Dale Long" <>
Date: Fri, 7 May 2010 11:12:31 -0400
List-post: <">>
Hello all:

Yes, Felipe is right, and also Jorge.  Very difficult to import heavy items.
In fact it is hard to find a good transformer even in a broken amp...Because
usually if the tube is broken, that can be imported, so there are a lot of
broken amplifiers with bad transformers.  

The best possibility is something like a MLA2500 that is VERY EXPENSIVE to
replace the tubes.  We could use the transformer and case. Right now I know
of several broken amp in South America. But the broken part is the
transformer.  So that's not a help.

I know of some broken MLA2500 in Mexico and USA, but too expensive for

I agree with Jorge that we should attempt to find an amplifier in country,
especially if it only needs re-tubed.

At this point you have some folks looking, so lets see what turns up. 



-----Original Message-----
From: [] On
Behalf Of Felipe Ceglia - PY1NB
Sent: Friday, May 07, 2010 8:49 AM
To: Patrick Barthelow
Subject: Re: [Amps] Uruguay Amp Project


This is not a CX privilege. Here in Brazil we have the same problem.

You cant just browse a website and ask for something you need. If items are 
heavy and expensive, its a budget nightmare to bring it in. High shipping
and high taxes (sometimes up to 100% the product value, depending on

So, the way is to wander around junkyards and collect everything that seems
would be useful for a QRO project. You end up with a love of junk in the
(wives love it) and there are always some parts missing...



Patrick Barthelow wrote:
> Folks, 
> In the course of helping a YL build an amp in Uruguay, I am making
progress, but am amazed at the challeges faced by hams there, and probably
other small countries, who want to buy or build ham gear, particularly amps.
I found an  insider representative in the Uruguay broadcast tramsmitter
industry who is looking for spare broadcast transmitter parts, suitable for
Amateur amps, such as tubes, transformers, power supply parts, etc for this
> He said, in the commercial TX world repairs or parts acquisition is
difficult and expensive, and a main vendor they rely on is Nebraska Radio
Sales.  OUCH(!)  NRS seems to have insanely high prices on QRO RF
components, at least to me they seem high.  To add insult to injury this
insider says every purchase, say for a $1000 vacuum variable, or say a
transformer has a $1000 (equal amount) dollar duty tacked on before he can
bring it in. OUCH!  Says there are a lot of solid state Broadcast TX there,
but also a lot of older tube transmitters, in the 1-10KW range as spares,
backups so I am hopeful to find the heavy parts for a power supply there, to
save money...In the olden days, here, the 4-400A was a common find if you
trolled radio station engineers for spares, probably not so much any more. 
> As to commercial ham gear I bet they also pay a super high tax on retail
gear brought in, so anyone in CX land on the air, has committed considerable
economic effort to do so.
> I wonder if this lady could find usable components in a junked 1KW
microwave oven for a power supply, diodes, or caps, transformer, etc?  The
last microwave oven that I took apart, had some hefty lookig HV diodes, and
what looked like a transistorized flyback style HV generator.   I will have
to look through arciived threads on the reflector here....
> Best Regards,   
> 73, de Pat Barthelow AA6EG
> _________________________________________________________________
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Felipe Ceglia - PY1NB
PR1T team member /// Rio DX Group member /// Araucaria DX Group member /// ///
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