You can click on the image to jump to data from my weather station at Weather Underground. Or, you can click here for 24 hour data uploaded directly to my Clifton Laboratories web site.

If you are a potential customer for my kits, please  take a moment and respond to my poll on the type of construction you prefer. One vote per person, please.

Surface mount kits will use passive parts of 1206 size or larger and integrated circuits with a pitch of 0.05 inches/pin or larger.

I found an error in my paper on intermodulation performance of the Z1501D active antenna. The error is at page 17 and I over-stated the predicted strength of the 3rd order intermodulation signal produced by two -20 dBm signals. The unwanted interfering signal (in "S-units) is not S-5 as I originally said, but S-0 and hence below the noise level in all but the exceptionally low noise locations.

Although I computed the interference level in dBm correctly, I mis-read my spread sheet conversion from dBm to S-units. The spread sheet is in both dBm and dBW and I looked at the dBW column when originally drafting the analysis.

A corrected version of the analysis now replaces the original document.
 

All outstanding orders for Z1501D active antenna, Z1203A coupler are completed and shipped.

The photo below shows five Z1203A couplers on my bench ready for assembly Saturday morning, completed late Sunday.
 

As usual, last month's Updates are now in the archive. You may view the February 2010 updates by clicking here or by the links in the  table at the top of this page.