[QRP] Which SWR/PWR meter for 1 Watt QRP?

[Dennis Berry]

Do a google search and you'll find a few designs.  One was the accuprobe, 
one by w7el as I recall.  You need an opamp with diode feedback, or 
something like an AD8307 chip at those low levels.  Here is a page that uses 
an accuprobe design with the nogawatt detection circuit someone else 
mentioned.  I have not built one, but have wondered how to best read low 
power as you are.

http://www.w5usj.com/images/powermeter/nogapwrmtracprb.gif

dennis, nu8s

----- Original Message ----- 
From: "Glenn" <kd5hcl at yahoo.com>
To: <QRP at mailman.qth.net>
Sent: Friday, August 20, 2010 12:37 AM
Subject: [QRP] Which SWR/PWR meter for 1 Watt QRP?


> Are there any swr/pwr meters optimized for use at the 1 watt level? I have 
> a meter which has a low setting of 10 watts, however its really useless at 
> a watt. Even among the cb (which is max 5w , right?) I dont see anything 
> less than 10w full scale(which makes 1w look like a very small deflection 
> due to the logarithmic scale)
>
> If there are no 1 or 2.5 watt full scale meters commercially made, has 
> anyone seen a QST/Handbook project for building one?
>
> 73,
>  Glenn
>
> -.-
>
>
>
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