Need parts? Jameco is offering free ground shipping in continental US with Code OLP05951Y until April 12.
This video is an introduction to amateur radio produced by a club in Quebec. It’s a very slick production.
New NIST time code. From the 3/5/13 NIST Tech Beat:
The National Institute of Standards and Technology (NIST) is changing the way it broadcasts time signals that synchronize radio-controlled “atomic” clocks and watches to official U.S. time in ways that will enable new radio-controlled timepieces to be significantly more robust and reliable. This new time broadcast protocol will not only improve the performance of new radio-controlled clocks and watches, but will encourage the development of new timekeeping products that were not practical with the old broadcast system because of local interference or other limitations. For example, appliances such as refrigerators, microwave ovens and thermostats, as well as traffic light timers and sprinkler systems will be able to take advantage of this new phase modulation broadcast.
Open-source RF. EETimes reports:
Lime Microsystems Ltd., a developer of configurable multi-band radio transceiver ICs, has launched an open-source RF hardware project that it says is intended to further innovation in wireless systems. The non-profit initiative has been launched under the name Myriad-RF with its own website and includes pre-made RF boards with editable design files that developers can freely download and use in their own designs.
I like this idea a lot, and I think it deserves a good look by radio amateurs.
Karl, W4KRL, posted this to the AMRAD mailing list….Dan
Printed circuit board technology was invented by Paul Eisler (right), an Austrian refugee to England in 1936. Its first significant use was in anti-aircraft proximity fuses by the US Army. Eisler made little money from his invention. His autobiography is My Life With the Printed Circuit.
He set up a company called TechoGraph, in England, to promote the printed-circuit board. Their online history, notes:
But for both Eisler and Technograph, getting the printed circuit off the ground was to take some time. Not only had development work to be undertaken, but the electronics industry had to be persuaded to drop point-to-point wiring in favour of an interconnection medium that, although inherently more consistent and more reliable, was, at least initially, considerably more expensive. Not an easy task.
Prior to the PCB almost all construction was point-to-point except for a few high-end and military products that used turret boards. Some people still use turret boards, and you can still roll your own.
From the trade magazines, selecting crystals, understanding measurement uncertainty, Maxwell’s equations
Another selection of articles from the electronics engineering trade magazines……Dan
Selecting Crystals For Stable Oscillators
Understanding how quartz-crystal resonators operate can lead to designing crystal oscillators with improved stability and better noise performance.
Tutorial on Maxwell’s Equations
There’s a lot of math here, but cracking Maxwell’s equations will give you a lot of insight on how radio works. Registration required.
Understand Uncertainty For Better Test Accuracy
How sure are you of that measurement you just made with your multimeter or wattmeter? This article might open your eyes as to the accuracy of your measurements.
Bill, AA2YV, is not only a fine amateur radio operator, but a professor of German at Nazareth College in New York.
Build a SW receiver with only four transistors!
A video review of the KG-UVD1P, my latest acquisition. Short version: he likes it.
Here’s a collection of ham radio-related videos that I’ve run across in the last week or so. I need to start doing videos. Anyone wan to help me out?
Velveeta? Really? Kraft is using ham radio to plug Velveeta cheese. It’s pretty cheezy (pun intended), but funny, too. Seriously, though, I hope not too many of you out there eat this stuff. If you need a recipe to make some “real” macaroni and cheese, I’ll post my recipe here.
PL-259 Connector Installation. Thanks to Alex, N3DER, for posting a link to this video on the Tacos mailing list. The video’s creator, Murray, W9EHQ, is very thorough and presents a very good technique for installing PL-259s onto coax. Lately, however, I’ve been using crimp-on PL-259s. Crimping the connectors is much easier than soldering them. Phil, M1GWZ, is also not sold on this technique. He notes, “I didn’t find the video entirely convincing. For a start, he remembered to put the plug cover on the cable before soldering the connector on. I’ve never seen anyone do that before. :-)”
Yagi and Lightbulb Antenna – K0NR. Bob, K0NR, demonstrates polarization using a simple 2m dipole with a lightbulb connected between the two elements. I’ve done this demonstration down at the Hands-on Museum. It’s a really good way to show how polarization works.
Central Middle School radio club students work on projects
The future of amateur radio in Midland was in room 127 of Central Middle School on Wednesday afternoon.Bill Albe brought kits to build the FET crystal radios he designed, along with tools sure to excite middle schoolers — drills, solder, means to measure electrical resistance across their bodies — plus ample adult supervision.
I’m trying to find out more about this project so that I can do something similar at the Hands-On Museum….Dan
Back to the Future — amateur radio enthusiasts bring transmitter back to life
The wait – four weeks short term and 40 years and counting long term – was well worth it when the 75-year-old transmitter built by amateur radio pioneer Marshall Ensor was reactivated Saturday evening at Ensor Park and Museum south of Olathe.
Ham radio alive and well in Boulder County
This is a nice profile of the Boulder Amateur Radio Club (BARC). BARC Juniors is a program of the club, which encourages kids to get involved in amateur radio. Great club, great program.
Funny stuff. They ought to slow down, though, so they can maintain it over the long haul.
My Submission to FCC to Modernize Ham Radio Rules: Here’s my submission to FCC to modernize ham radio rules rega…http://t.co/zUCTVK1I
Bruce Perens talks about rules for digital modes.
Apparently, it uses cheap LEDs, but KC8GRQ plans to replace them with high-intensity LEDs.