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Old April 8th 04, 02:10 AM
Richard
 
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Default QRPp power meter

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?

Rgds
Richard SO5GB


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Old April 8th 04, 06:37 AM
Roy Lewallen
 
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"A Simple and Accurate QRP Directional Wattmeter", in Feb. 1990 QST fits
the description. It also appeared in several ARRL Handbook editions
shortly after the QST article was published, and in some reprint
publications like ARRL's _QRP Classics_.

Roy Lewallen, W7EL

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?

Rgds
Richard SO5GB


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Old April 8th 04, 06:37 AM
Roy Lewallen
 
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"A Simple and Accurate QRP Directional Wattmeter", in Feb. 1990 QST fits
the description. It also appeared in several ARRL Handbook editions
shortly after the QST article was published, and in some reprint
publications like ARRL's _QRP Classics_.

Roy Lewallen, W7EL

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?

Rgds
Richard SO5GB


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Old April 8th 04, 07:42 AM
PaoloC
 
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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!

Happy Easter, if applicable
Paolo ik1zyw

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Old April 8th 04, 07:42 AM
PaoloC
 
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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!

Happy Easter, if applicable
Paolo ik1zyw



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Old April 8th 04, 07:47 AM
Gregg
 
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Behold, PaoloC signalled from keyed 4-1000A filament:

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!

Happy Easter, if applicable
Paolo ik1zyw


Oh, that is just too sweet! )))))))))

--
Gregg
*It's probably useful, even if it can't be SPICE'd*
http://geek.scorpiorising.ca
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Old April 8th 04, 07:47 AM
Gregg
 
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Behold, PaoloC signalled from keyed 4-1000A filament:

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!

Happy Easter, if applicable
Paolo ik1zyw


Oh, that is just too sweet! )))))))))

--
Gregg
*It's probably useful, even if it can't be SPICE'd*
http://geek.scorpiorising.ca
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Old April 8th 04, 12:32 PM
Per-Ake Andersson
 
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In article , "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?

Rgds
Richard SO5GB



Some tips power and swr:
http://www.njqrp.org/ghbextra/3/3i.html

Good in practise japanese (dont need to read):
http://www.geocities.jp/ja6hic/soku/swr/swr.html

http://www.qsl.net/mnqrp/swr.htm
http://www.g4wif.fsnet.co.uk/q_tech15.htm

With led-indicator:
http://ua70.faithweb.com/cgi-bin/i/minipig/qrp-tune.jpg


/Per-Ake

--
Remove "extra" in my e-mail adress !!
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Old April 8th 04, 12:32 PM
Per-Ake Andersson
 
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In article , "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?

Rgds
Richard SO5GB



Some tips power and swr:
http://www.njqrp.org/ghbextra/3/3i.html

Good in practise japanese (dont need to read):
http://www.geocities.jp/ja6hic/soku/swr/swr.html

http://www.qsl.net/mnqrp/swr.htm
http://www.g4wif.fsnet.co.uk/q_tech15.htm

With led-indicator:
http://ua70.faithweb.com/cgi-bin/i/minipig/qrp-tune.jpg


/Per-Ake

--
Remove "extra" in my e-mail adress !!
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Old April 8th 04, 01:10 PM
Hans Summers
 
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"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



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