Hi Frank,
My TDR is nearly fifty years old, but still it works great.
Array Solutions sells more modern multi-functions devices
that are perform very well as a TDR. Here's an example display
from Array Solutions' web site:
https://www.arraysolutions.com/images/AIMuhf-TDR-fig1.png
The display for a Beverage looks very similar, you can see every
component from the shack to the termination resistor.
73
Frank
W3LPL
----- Original Message -----
From: dl8yhrfrank@aol.com
To: donovanf@starpower.net
Sent: Monday, November 23, 2015 9:20:55 PM
Subject: Re: Topband: fixing beverage
where can i get such toy?
-----Ursprüngliche Mitteilung-----
Von: donovanf <donovanf@starpower.net>
An: TopBand List <topband@contesting.com>
Cc: Jorge Diez - CX6VM <cx6vm.jorge@gmail.com>
Verschickt: Mo, 23 Nov 2015 9:39 pm
Betreff: Re: Topband: fixing beverage
A Time Domain Reflectometer is one of the best tools to verify
the proper performance and isolate faults of a Beverage and many
other types of antennas.
In the case of a Beverage, the TDR allows you to see every
component of the antenna system from the ham shack all the way
to the termination resistor. If anything fails you can almost
always walk directly to it with the needed replacement parts and
tools in hand.
73
Frank
W3LPL
----- Original Message -----
From: "Jorge Diez - CX6VM" < cx6vm.jorge@gmail.com >
To: "TopBand List" < topband@contesting.com >
Sent: Monday, November 23, 2015 8:29:15 PM
Subject: Re: Topband: fixing beverage
Thanks all you guys for the help
Will do this tests and see what is wrong
73,
Jorge
CX6VM/CW5W
-----Mensaje original-----
De: Tom W8JI [ mailto:w8ji@w8ji.com ]
Enviado el: lunes, 23 de noviembre de 2015 02:35 p.m.
Para: Jorge Diez - CX6VM; 'TopBand List'
Asunto: Re: Topband: fixing beverage
>
> I notice that my USA beverage is lower in 3-4 S units that some weeks ago.
>
5-20 dB. Depending on receiver and where it is at on the S meter.
That has to be a poor connection, open, or short between the receiver and the
Beverage transformer end of the Beverage. It cannot be at the termination end.
> At simple view all seems to be OK. I think the coax is not the
> problem, because if I have a problem in the coax, will be completely deaf,
right?
No. Coax can do this. It happens all the time. Especially at connectors.
>
> So this can be the cause of a problem in the end resistor or maybe in
> the transformer? I use in this beverage a WX0B beverage boxes
>
It can not be at the end resistor termination.
The problem is if you disturb something it will often start working. You need
to
carefully check one thing at a time. Many times, if not most times, this is
corrosion or tarnish on the center pin of the coax. Sometimes it is a broken
wire, or a bad part from lightning or water.
The best way to test it is with an SWR meter and do a frequency sweep from the
house, before you touch the antenna or any outside connections. The frequency
of
either adjacent major dips in SWR or impedance will allow you to calculate
exactly where the problem is. The MFJ analyzer will do this within a few feet,
even on a 1000 foot cable, by using distance to fault.
73 Tom
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