"PaoloC" wrote in message
...
Richard wrote:

Does anyone have a ny designs for a (low) power meter that would read
powers
of up to 1w (down to say 50mw or even lower) up to and inc. 6m?

Check this out:
http://www.webx.dk/oz2cpu/radios/miliwatt.htm

It is based on Analog Devices' AD8307 chip. You can skip the PIC part if
you have a reliable DVM!

A nice chip the AD8307, very easy to use. I used one as the logarithmic
amplifier stage in my spectrum analyser. It's available at Farnell
http://www.farnell.com in 8-pin DIL, which is another nice thing for a
relatively new IC. Expensive though, and of all the chips I could've fried
when constructing my analyser, I had to fry that most expensive one and get
a replacement. I guess to do otherwise would probably be in violation of
Murphy's law, or Sod's law or someone's.

73 de Hans G0UPL
http://www.HansSummers.com