RF Power Meter Project
N0FP and I are investigating RF
power meter ideas. There are a lot of designs based upon the AD8307 A to D converter.
Many of the design variations originate with the W7ZOI design.
I decided to convert his design from the June 2001 QST article into a TinyCad schematic.
The image above is my first pass at the initial schematic capture. I might be missing
components or have typos in there... but this is the starting point. (Click on the
image and it will open a larger version with more detail.) The initial schematic
was not too hard. I had to create new parts for the AD8307 and the LM386 but that
only took a couple of minutes. I probably have about 60 minutes or so of time into
this schematic once I filter out all of the interruptions.
We are looking at prototyping this project and potentially adding some features to
make the design our own. I suspect the analog meter is not long for this project but
I will hold back on some of the new ideas until we get a bit further down the road
as there is quite a bit of research and testing to do before we get too crazy.
If you are interesting learning more about this project or participating please ping
me directly.
73 de NG0R
---
Some follow-up notes on 2010-01-10:
http://www.ka7exm.net/pic_power/index.htm
http://www.ka7exm.net/pic_power/ProjectNotes/x.pdf
Roger has a nice update to the original W7ZOI design that was published back in 2001.
I have other design and feature ideas so I don't think that I am going to order/build
Roger's design but will instead likely work through something on my own path.
73 de NG0R
power meter ideas. There are a lot of designs based upon the AD8307 A to D converter.
Many of the design variations originate with the W7ZOI design.
I decided to convert his design from the June 2001 QST article into a TinyCad schematic.
The image above is my first pass at the initial schematic capture. I might be missing
components or have typos in there... but this is the starting point. (Click on the
image and it will open a larger version with more detail.) The initial schematic
was not too hard. I had to create new parts for the AD8307 and the LM386 but that
only took a couple of minutes. I probably have about 60 minutes or so of time into
this schematic once I filter out all of the interruptions.
We are looking at prototyping this project and potentially adding some features to
make the design our own. I suspect the analog meter is not long for this project but
I will hold back on some of the new ideas until we get a bit further down the road
as there is quite a bit of research and testing to do before we get too crazy.
If you are interesting learning more about this project or participating please ping
me directly.
73 de NG0R
---
Some follow-up notes on 2010-01-10:
http://www.ka7exm.net/pic_power/index.htm
http://www.ka7exm.net/pic_power/ProjectNotes/x.pdf
Roger has a nice update to the original W7ZOI design that was published back in 2001.
I have other design and feature ideas so I don't think that I am going to order/build
Roger's design but will instead likely work through something on my own path.
73 de NG0R