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NJD Technologies’ Blog pages by KB5NJD, John Langridge, are one of the best sources of information I’ve found for 630m (and 2200m). W5EST put some of the information in these blog entries into book form. The book has 22 chapters. I could not find a set of easy links to these, so I have made …
Continue reading “2-18-18 Blog: NJD Technologies 630m Blog Book by W5EST”
The graph above is a comparison of signal levels for 630m WSPR signals simultaneously received at my station between December 10 and December 12, 2017 on the 500 foot BOG “aimed” at 250 degrees azimuth and the 200 foot BOG aimed at 40 degrees. You can see that nearly 10,000 signals were simultaneously received. …
Continue reading “12-13-17 LF Blog – Comparison of 500 ft and 250 ft BOGs on 630m and 2200m”
Yesterday I installed my first BOG (Beverage On Ground) at Hilltop. Russ, NN3Q, was kind enough to loan me two 200-foot BOGs with transformers that he had taken out of service on 160 meters. So the BOGs are a bit short for 630m and 2200m, but i figured that I would give them a try. …
Continue reading “11/15/2017 LF Blog – First Experience with BOG (Beverage On Ground) Antenna”
I heard my first signals and got my first decodes last night on the 2200m / 0.136 MHz band! My first decode, which came immediately on my tuning to this band, was from WH2XND in DM33, 3356 km away from my QTH, with a signal strength in WSJT units of -27 dB. WH2XND was copied …
Continue reading “W3SZ 11-12-17 LF Blog – First 2200m Decodes and more 630m Receive Analysis”
One of the first questions I have had as I am getting started with 630m is, “How well am I doing in terms of my receive system”? Fortunately, there is a great tool available to all of us for testing our receive systems. That tool is WSPRNET, and we can use it to compare our …
Continue reading “W3SZ 10/31 LF Blog – Using WSPRnet to Quantitate Receive Performance”
There was not much new overnight on 630m. I had 250 simultaneous decodes on both antennas bringing the number of simultaneous decodes since I put up the new antenna on Saturday 10/28 to 604. There were no new stations copied. There were 8 stations simultaneously copied on both antennas, so I could calculate the difference …
Continue reading “W3SZ 10/30/17 LF Blog – Comparison of Two Short Inverted Ls”
I am currently exploring the 630m band primarily by monitoring WSPR broadcasts, in order to get a sense of what propagation is like, and what my receive capabilities are. I have two openHPSDR Hermes transceivers at Hilltop, each one hooked up to an inverted L antenna fed with hookup wire which is connected to its …
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