I suspect that what it means is 28 deg, 27.319 min N and 82 deg, 36.623 min W. Since there are 60 minutes in a degree, that becomes: 28 + 27.319/60 deg = 28.45531667 deg and 82 + 36.623/60 deg = 36.6
Direcway uses a satellite uplink. I don't know what speed it supports. Bob, N7XY _______________________________________________ See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
He said the AC ground point was at the water pipe. I believe that connecting the water system to the electrical service ground (which must have its own ground) is a code requirement just about anywhe
They even have a model AR-22, although it is slightly beefier than the CDR version I had in the 1950s. Bob, N7XY _______________________________________________ See: http://www.mscomputer.com for "Se
Wes, I haven't come across any texts which discuss this, but you can look at the situation as a sphere with a radius equal to the distance from the antenna which has a uniform power density. Calculat
The last time I checked (~1998) it was something like $850 unless you were a university. Being retired, that was more than I could justify spending. I just took a look at the LLNL website <http://www
Ah memories! I used an 8405 to phase match the T/R modules and transmission lines for the NASA ATS-1 satellite's VHF repeater about 40 years ago, after all other methods I had tried gave conflicting
The Maxcom was reviewed (debunked?) in QST, November 1984. The product review is available in the members-only section of the ARRL web site. There are X-ray photos as well as one of a unit with some
I self-installed one when I lived in Tucson, AZ (an area with significant seasonal lightning). A co-worker told me that his had taken a nearly direct hit and protected everything in his house (the pr
From the WD-40 website (FAQs): What does WD-40 contain? While the ingredients in WD-40 are secret, we can tell you what WD-40 does NOT contain. WD-40 does not contain silicone, kerosene, water, wax,
I am using a AV-640 at ~14 ft without any radials. Subjectively, the performance exceeds my expectations on all bands (OK, it took several tries to bag K7C on 20 with 500 watts). When conditions were
It's been several years since I installed my AV-640, but I recall that the matching unit already has a common-mode choke at the input. Bob, N7XY _______________________________________________ See: h
There is a good chance that the motor start capacitor inside the TR44 control box is bad. This is a very common failure mode. I don't know for sure, but doubt that the two controllers are interchange
Thanks, I needed a good laugh! Bob, N7XY _______________________________________________ See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather Stations", and lot's more. Call
There are frequencies where there is a resonance with water molecules which causes a quite high attenuation, even without rain or snow. I can't find any data in a brief search, but recall that 54 GHz
I used rotary joints for many years when I was working on antenna ranges, but don't recall ever seeing any coaxial models with which I would feel comfortable running amateur legal limit power levels.
I have mainly used single channel (N or SMA connector) types and recall that the N units would handle >1 kW peak, but only ~100 W or less avg, so it is probably thermal dissipation (this was several
Maybe it's an accessory for Doug DeMaw's Tuna Tin 2 QRP transmitter from the May 1976 QST. Bob, N7XY _______________________________________________ See: http://www.mscomputer.com for "Self Supportin
When I was looking into multiband verticals about 5 years ago I took one look at the GAP website and was quite wary about the pseudoscience of their claims. I got a copy of the K7LXC/N0AX vertical re
http://www.mods.dk/view.php?ArticleId=2280 As an alternative, here's a pretty neat (and cheap) device to find the frequency of minimum VSWR--the Tenna-Dipper kit: http://4sqrp.com/kits/td/td.htm 73,