This article documents the modification of 2 typesof Hewlett Packard switching power supplies to enable their use as power sources for ham radio equipment. Obsolete server power modules can be bought fromÂ online dealers at very good prices due to the massive replacement of older network servers; typical prices for a unit are as low
A Sleep Strategy for DX Contesting This article originally appeared in the National Contest Journal. Why am I here? Listen to all these signals. Who are they? Wonder what they are doing? All this CW sure sounds nice. What should I do with this keyer paddle? Should I push this button? I can turn this
This evening at our local club, we were sorting old QST in our club library.
I just found this historical issue, dated November 2001.. with a hard-to-forget cover page.
Received from Jojo DU1VHF, NTS Chairman and CFO for the Philippine Amateur Radio Association – please read and heed. “The much-awaited CQ WW CW Contest is nigh and everyone is chomping at the bit. However, here in the Philippines, our enthusiasm is a bit tempered by the recent events of a catastrophic typhoon which
This summer I was looking for a cheap Android Tablet in order to replace a dead TomTom Go730 GPS navigator, that suddenly decided to dead and being close to go in holiday I decided to investÂ money into a more versatile device that could be used as a gps navigator but even in other ways.
DL9KCE released a new version of his ICNIRPcalc software that allows you to calculate safety distances for many know amateur radio antennas with respect to ICNIRP limits. Calculations are done by considering many depending factors, like your Antenna characteristics, Band, Gain, Power Output, Coax Line, additional attenuation and many more. By variating any of these
This antenna requires the use of Tuned Open wire feed line , ladder line , window line , etc. NOT Coax cable ! It is suggested a 450 – 600 ohm line. This antenna also requires the use of a matching network “Transmatch” at the transmitter end of the feed line. WH2T used a 75
Putting your first ham radio station together can be an expensive proposition. One way to cut costs is to keep the antenna simple. Here’s how WB1FSB shaved the price and provided four band operation. This old QST article illustrate how Marian Anderson WB1FSB setup a four band 80 40 15 and 10 meter band, ground-mountedÂ