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LF: Re: Vintage RF current meter

To: "[email protected]" <[email protected]>
Subject: LF: Re: Vintage RF current meter
From: Rik Strobbe <[email protected]>
Date: Wed, 4 May 2016 09:24:07 +0000
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Thread-topic: Vintage RF current meter

Hello Luis,

 

one way to change the range without opening meter is to use two 4/1 radio transformers:

- first transformer high side to the TX, and low side to one and of the meter

- second transformer low side to the other end of the meter and high side to the antenna

Drawback: the transformers will introduce some additional loss

 

  -----                  -----

       }|    Meter     |{

       }|     +--+     |{       

TX     }| ----|  |---- |{       Antenna

       }|{    +--+    }|{

  -----   ------------   -----

 

73, Rik  ON7YD - OR7T

 

PS: drawing needs a monospace font (eg. Courier New)

 


Van: [email protected] <[email protected]> namens VIGILANT Luis Fernández <[email protected]>
Verzonden: woensdag 4 mei 2016 10:46
Aan: [email protected]
Onderwerp: LF: Vintage RF current meter
 
Hi xyF
 
Yesterday I got a nice gift from a local friend, Pascual EA5JF :-)
 
 
Unfortunately the current range under 1A looks unusable 
Still not opened to have a look. Seems to use a thermocouple. Is there any chance to make it
more sensible and usable for <1A currents ?
 
73 de Luis
EA5DOM
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