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[AMPS] Power out indicator

To: <amps@contesting.com>
Subject: [AMPS] Power out indicator
From: 2@mail.vcnet.com (Rich...)
Date: Tue, 12 Feb 2002 23:21:05 -0800


>
>Hello:
>
>I'm building a 160M only link-coupled antenna tuner.  Will have a Bird
>wattmeter on the input side, but would like to have a "relative power
>output" indicator on the output side (600 ohm balanced line).
>
?  Such an indicator is not very useful because a g-g amplifier is tuned 
for max out with max drive using its built in RF relative output meter.  
Tuners need only a reflectometer to indicate when zero reflected power is 
obtained during adjustment.  

>I've seen schematics for such devices in handbooks, but they are used on
>the output of amplifiers running into 50 ohm loads, and include
>provisions to measure reflected power, as well.
>
>I'm thinking that the voltage on the 600 ohm line could be much higher
>than it would be on 50 ohm line.
>
?  C. 3.5 times higher

>All I (think) I need is a voltage dropping resistor, a diode, a pot to
>fine-tune the voltage and a DC meter.  I just don't know the values of
>each.
>
>Anyone know where such a circuit may be found?
>
>TNX, Barrie, W7ALW
>
>--
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>
>


-  R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K, 
www.vcnet.com/measures.  
end


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