Saturday, July 31, 2010

Bike Sold

After thousands of miles of two-wheel motoring fun I sold the bike. In those thousands of miles on various bikes I was involved in two road accidents: an approaching car turned left into my path on highway and in another case I was struck from behind while stopped at a traffic light. In both cases a helmet lessened the deceleration of my brain impacting the pavement.



Biking is such fun, but on the road, my personal experience suggests that even a safe rider is at the mercy of other drivers. Those two drivers (that easily could have killed me) were just normal folks who "didn't see" me. There are plenty more unsafe drivers who are careless, clueless, impatient, distracted or impaired. Try not to be one. I will too.

Thursday, July 29, 2010

Kit Building


Kit building is a fun aspect of ham radio. And even if you don't have your amateur radio license yet, you can build a shortwave receiver and listen to hams and foreign radio broadcasts.
Here are a few of the radios I have built. The one in the upper right is a regenerative type shortwave receiver. Here is what that international broadcast sounds like on that radio:

Wednesday, July 28, 2010

Fun Antenna Project

A simple loop antenna, tuned with a variable capacitor, makes a fun project that improves the performance of AM broadcast radios. You can experiment with the number of turns and size of capacitor to find various resonant frequencies. Other types of variable capacitors and construction techniques are of course possible. There is no need to use a hula-hoop and no need to make the loop circular -- smaller square loops with various numbers of windings also work great! Have fun, de NG9D . .

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