Ham Radio

I am an amateur “ham” radio operator, call letters: N0DL, and have been active in that hobby since 1973, first licensed as WN0LSI then shortly after that as WB0LSI.

Here are the last 10 current QSOs in my Clublog log:

My QRZ.com Logbook (When I sync it up with LoTW – NOT live):

Here’s a photo of the ham radio shack at the High School in Staples, MN from the early 1970’s:

Shown above: A Heath oil-filled ‘cantenna’, Drake W-4 directional wattmeter, Drake TR-4B and a Heath HD-1410 keyer that I’m pretty sure I built for the club from a kit (Heathkit).

I created a PowerPoint slide show on the
Reduction of Telephone Interference that I presented at the 1999 Dakota Division Convention here in Watertown, SD.

A fellow ham buddy and I used to own a repeater in the late 70’s.  We had a local radio announcer with a nice voice from Q98 in Moorhead, MN create an audio ID for N0DL Repeater:

There weren’t too many repeaters with voice IDs back then so the repeater was frequently ‘kerchunked’.

Articles of interest to hams and audiophiles:

Balanced Lines in Audio Systems: Fact, Fiction and Transformers by Bill Whitlock (PDF, ~8Mb)

Here’s a technical note I wrote in 1998 explaining why the value “4.44” shows up in the calculation of inductor and transformer flux density when working with a sinusoidal waveform.

Because I can’t find it anywhere else on the ‘net, the OCR’d PDF of the 1994 EIA Source and Date Code Book listing transformer and capacitor manufacturers as of that year.  Here is a plain scanned version if you find my OCR version doesn’t display properly.  I also found and OCR-scanned the EIA 1995 Source and Date Code Book.  Link to additional years of the EIA Source and Date Code book.

Good article on inductance of gapped ferrite cores: Evaluation of Several Factors Affecting Inductance Measurements of Ferrite Components by Barbara Ann Livermore and Jan M van der Poel.

Audio Tech Types: JVC Compulink files viewed using a soundcard.

Thanks for stopping by!