From Jerry Ritchie of station WA5OKO:
The HP-8753C Vector Network Analyzer cost $30,000 when it was new. Its weight is about 50 pounds and takes up a lot of space on my work bench. It was one of my first instruments that provided Smith Charts. 20 years later, they about the size of a pack of cigarettes and cost about $400 and have a range of 1 MHz to 3 GHz. The MiniVNA Tiny’s size makes my MFJ-259B look like a boat anchor.
I compare the VNA instrument to the original cell phone. When cell phones first came out, I couldn’t imagine why I would ever need one. Most amateurs look at Smith Charts like they are something from outer space, but they will eventually talk about that SWR meter they used in the old days to test antennas.
I hope this article will make the transition a little easier.
Smith Charts, by Jerry Ritchie WA5OKO
Jerry Ritchie of Amateur Station WA5OKO returns with a new technical paper—this time on the way that band-pass and band-reject cavities work. It’s called, quite appropriately, How the Bp-Br Cavity Works.
Jerry Ritchie of amateur station WAOKO has passed along the written materials from his recent presentations. Thanks, Jerry!
RF Connectors and Impedance (for Amateur Radio)
Accurate SWR Measurements
John Armstrong, operator of KG5LWD and the LETARC newsletter editor, has just sent out the November issue of the Propagation.
On the plus side, the photos of sandwiches and coffee are largely absent from the website now. Things are a bit Spartan at the moment. A bit of color and glitz will be along in due course.
The club events calendar is hopping, though, so it seemed best to get the current events online soonest.
Welcome to the home of the up-and-coming LETARC website.
The new website installation package went live a few minutes ago. For a short time, it’s loaded with the default package software, which appears to be some sort of cafe page. That’s going to change shortly.
The old website has been moved off to the side. Once all the bits and pieces of the new site are well-underway, we’ll remove it.
Thanks very much,
Ross, the new website administrator