Archive for 2007/03


Here Comes the Sun (doo doo doo doo)

Mike, K8XF, sent this link to this NASA news item about a prediction for the next peak in the sunspot cyle. According to Mausumi Dikpati of the National Center for Atmospheric Research (NCAR), “The next sunspot cycle will be 30% to 50% stronger than the previous one,” she says. If correct, the years ahead could [...]

More Kits

This from “rwr01″ on the radiokits Yahoo Group:
I came across the Kit Radio Company the other day. They advertise some nice professional looking radio kits. They offer a Superhet, a Regenerative, a TRF and a DC receiver (all transistorized) and a couple of (looks like VXO) transmitters too! They’re based in England but shipping overseas [...]

Miscellaneous Links

Here are some miscellaneous links that I’ve come across lately:

Extra Class Math Guide. On the Extra Class test, they actually expect you to know how to calculate things like resonant frequency and phase angles. If you don’t remember your high school math, download this free guide.
Nightfire Electronic Kits. Want to start playing around with surface [...]

Bug Advice

On the qrp-l.org mailing list, Doug K4DSP offered the following advice for using a bug:

Get a decent bug. A piece of junk will sound like a piece of junk and you’ll get frustrated very quickly. You can still buy new bugs from Vibroplex for less than $200. You only buy quality once.
Whether you buy a [...]

A Modest Proposal for Two New Q-Signals

Yesterday, three of us carpooled to the Marshall Hamfest, about an hour west of Ann Arbor. On the way over, we got to talking about CW. Jack, WT8N, a relatively new ham who has—I am happy to report—taken up CW, noted that one thing he found puzzling was that it seemed to be common practice [...]

Searching for Parts? Search With These Web Services

Chris, KA8WFC, sent me a lead for Octopart, a search engine for electronics parts that searches the stock of Mouser, Digikey, Newark, and Allied. Rich, KD6HWF, also pointed out that FindChips.Com does the same thing, but with more vendors.
I tried both searching for the elusive 1N34A. Both websites show that Mouser has them available for [...]

Don’t Like MFJ? Here Are Some Antenna Analzyer Options

On the Elecraft mailing list, there’s been a flurry of e-mail discussing antenna analyzers. The most popular antenna analyzers is the MFJ-259B. As is often the case when MFJ equipment is discussed, there was much wailing and gnashing of teeth. Fortunately, the thread did not turn into simply a “bash MFJ” item. Instead, several guys [...]

The “Almost Random” Wire Antenna

I’m still amazed at the success I’m having with my random wire antenna on 80m. Yesterday, I worked a guy who said he was running 500W. He was, of course, 599 here, but he gave me a 589. There’s now no doubt in my mind that a random wire can be an effective antenna.
On the [...]

Homebrew a DC Power Supply Load

I thought you all might be interested in a recent thread on the HamRadioHelpGroup mailing list. One guy had just purchased a 40A power supply and wanted to be sure it could supply the full 40A before he connected his transceiver to it.
He sheepishly described his first attempt—using a 100A car battery tester as a [...]

DXTuners.Com Free (for a while, anyway)

DX Tuners provide access to a global network of remotely controlled shortwave and VHF/UHF receivers via the Internet. You aune the radios with your browser and get live audio. Normally, you have to pay to get access to all of the network’s receivers, but to celebrate the tenth anniversary of the launch of DxTuners.com, [...]