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#1
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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 |
#2
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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 |
#3
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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 |
#4
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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 |
#5
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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 |
#6
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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 |
#7
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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 |
#8
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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 !! |
#9
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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 !! |
#10
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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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