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For further study of the science of grounding, Motorola created a standard for radio communications sites. It is called R56 and can be found on several websites. Here is one from the Bureau of Land Management: https://www.blm.gov/sites/blm.gov/files/Lands_ROW_Motorola_R56_2005_manual.pdf
See Chapter 4.7
The Motorola Type B site target is a ground resistance of 5 ohms. Since I have 3 repeaters at my home site on 7×24, I have multiple ground rods, one on each tower leg and guy wire, connected in a ground ring which also contains my electrical service ground. My Single Point Station Ground bar is then connected to that ground ring. Perhaps overkill for a light-duty station, but it has saved me, on a hill top, thru many storms since installation in 1991.73,
Bill, NE1BVery cool recording and a good example of multipath. With the fantastic sunspot numbers you were hearing the direct SHORT Path (SP) and the LONG Path (LP) with a slight latency, going around the world the long way! You could have probably reduced the “distortion” and copied him better by turning your antenna to null out one path or the other. This also might indicate your Front-to-Back (F/B) ratio on your antenna could be improved upon. I also enjoyed CQWW CW and made 1M points (804 QSOs). 73 de Bill, NE1B
Take a look at 6860 to 6910 KHz also. There has been a huge unidentified signal there the last several nights. It gets stronger later. Not there during daytime or early evening.
73,
Bill, NE1BGreat work! While I could not participate, I did alert several hams in the Rochester and Southern Maine area thru the DMR net. They followed on aprs.fi and watched the sky! Glad the local digipeaters could follow it down to 1500′.
73,
Bill, NE1BHello Bammi,
You are correct. On 2 meters, the spacing between repeaters or simplex channels is 15 KHz above 146.500. Normally starting at 146.520, then 146.535 and 146.550, etc. Below 146.500, there are digital repeater outputs down to 146.400. Below that frequency are inputs to analog repeaters with outputs +600 KHz. There are also digital simplex channels around 145.790 for narrow band digital modes like DMR, D-STAR, Fusion. Those narrowband modes have channel spacings of 10 KHz below 146.000 MHz.
On 70 cm. you won’t hear much activity on simplex, unless there is a contest or SOTA activation, but 446.000 is the popular frequency for analog. Analog repeater or simplex spacings are 25 KHz, but there is movement to narrowband digital spacings of 12.5 KHz on 70 cm. to accommodate more digital repeaters.
73,
Bill, NE1B
Here are some of the VHF-UHF websites that were mentioned last night:
- Realtime VHF Propagation Map http://aprs.mountainlake.k12.mn.us/
- VHF-UHF QSO Map http://www.dxmaps.com/spots/mapg.php?Lan=&Frec=&ML=&Map=NA&HF=&DXC=ING2&GL=
- VHF Propagation Prediction Map http://www.dxinfocentre.com/tropo.html
Also, keep in mind the dates of the VHF-UHF contests:
ARRL June VHF Contest June 10-11
CQ VHF Contest July 15-16
ARRL September VHF Contest Sept 9-10
73, Bill, NE1B