UPDATE: SOLD! Thanks Bob! This unit has found a new home at Tufts University, but most importantly, it will be used for scientific research ...

After some experimentation with Glow-in-the-Dark pigment powder and creating the "fireworm", I came up with an application for it...

Sometimes, having a limited edition knife just does not "cut it" :-) I have this urge to improve on commercial products and custom...

After 5 years of moderate use, it was time to perform a basic maintenance of my BigIR Mrk III and I also wanted to take a look inside the El...

UPDATE 4.15.2014: Due to various reasons (personal schedule, parts availability, business feasibility, etc) , I have decided to discontin...

This time - Type-N female. One of the most critical components in DIY calibration standard is the connector used to build it. The market is ...

Jack Smith, K8 ZOA posted an interesting paper on " Measurement approaches of Crystal Motional Parameters " and designed a test ...

I always try to avoid using "between-series" adapters - there are so many out there with questionable quality. Sometimes these ada...

I am just about done with my second generation N2PK VNA . The first one I've built is mainly for portable / field use, while this larger...