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.
The Tail Gate sale is co-sponsored by the Regional Amateur Radio Clubs and held in conjunction with the Longview Trade Days Event
When: Longview Trade Days, Saturday, November 11, 2017, 9:00 a.m. – 5:00 p.m.
What: Free tailgate sale. Bring all of your new, old, & used amateur radio equipment that you would like to sell. This is an outdoor event and will be held rain or shine. The Longview Trade Days events should draw several thosand people who will be going to this event. This is an event for the entire family and there will be many different types vendors participating.
Who: Anybody and everybody who has an interest in amateur radio and electronics, or anyone who just wants to come by, say hello, and just visit and browse.
Cost: Absolutely free to all. Just bring your ham radio sale items and any tables, chairs or other displays that you want to use. Electricity will be available. Bring plenty extension cords Ark-La-Tex Amateur Radio Tailgate Sale has been provided spaces for free to Amateur Radio Operators during this event. There should be enough space for radio operators to display things they are selling. Amateur Radio Operators should set up along the SOUTH fence line at the Longview Fair Grounds near the entrance off Jaycee Drive unless instructed otherwise. Concessions will be available throughout the grounds.
Where: Longview Fair Grounds, 1123 Jaycee Dr, Longview, TX 75604
Talk- in Frequency: 147.34Mhz, +offset, tone 136.5
Contact Person: John Armstrong, KG5LWD
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