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

"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

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

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

"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

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

"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

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 !!

"Richard" writes:
Does anyone have any 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?

I don't know what your intended use is, but if you just want to measure
output power while testing a transmitter, what about just measuring the
voltage across your dummy load, since, for the same resistor, power is
proportional to voltage squared? (It may take a bit of work/ingenuity
to measure RF voltage at six meters, but that's one of the things that
being a ham is all about.)

--Myron, W0PBV.
--
Five boxes preserve our freedoms: soap, ballot, witness, jury, and cartridge
PhD EE (retired). "Barbershop" tenor. CDL(PTXS). W0PBV. (785) 539-4448
NRA Life Member and Certified Instructor (Home Firearm Safety, Rifle, Pistol)

"Richard" wrote in message ...
Does anyone have any 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

Oak Hills Research Has a real nice little meter, http://www.ohr.com/wattmeter.htm

Richard WB8KRN