Well, practically speaking, even a "pure carrier" takes up at least some spectrum. We used to say, by rule of thumb, that CW occupies 2 times the keying speed. 40 cycles, Hz, for 20 WPM, etc.. Most o
Most solid state transmitters emit a signifgant amount of "phase noise." You can clearly see these spurious emissions on the ARRL labs spectral purity pictures. Since they are transmitted over a wide
My experience with open wire line only goes back to 1949 but it pretty well parallels N4LQ's. I don't want ladder line anywhere close to my shack, or my neighbors TV's and telephones. I don't know ho
How does a radiating feedline cause TVI? That depends on the individual case, but... In my case a radiating feedline about 20 feet from the local CATV system's cable put enough energy into the CATV s
Large white insulators on top? For only a hundred watts? Small white insulators would be sufficent but the top of the rig's where the coffee pot goes! 73 Pete Allen AC5E
Hi Larry: by all means keep the 238 and get the Orion. Always remember that any competent interior decorator will tell you to never, not ever, buy matching furniture for a high class room. "All that
Robert, can you hook your Omni up to an Astron, get the battery out of your truck, or something? I had that problem, and found just a leeeetle bit of RF was getting into the power supply and shutting
Agreed, a really good ground is not all that expensive. While I have built and used several ground fields I to work a couple of them over after lightning strikes. So I do it a little differently nowa
Hi Scott: I have a couple of employees who live near that site, west of Purvis, Ms. But no, I'm about 25 miles from there. This is USED oil well casing from the Jimmy Carter days. It's been down a bo
Well - personally I prefer one handy dandy ground for everything but the safety ground in the house wiring. Since they figured out that several of my hiker friends who were found dead near lightning
Hmm, sounds like a high SWR situation. With a Thunderbird, assuming proper assembly, your actual SWR should be very low. Your 238 should be in bypass, with the Z knob straight up and the tuner out of
Stuart: Walt is perfectly correct as long as we are talking about TUBE circuits. Tubes represent a severe mismatch to reflected RF, with only the essentially trivial losses in the tank circuit keepin
Stuart, you are at least as dogmatic as the professor who made me decide I didn't care for an academic life. I fear you are getting old, young man. An experiment to prove or disprove my statements is
Faraday rotation causes radio signals to "rotate" from horizontally polarized to vertical and back, more or less continuously. Particularly over a multi-hop path. Therefore it's not uncommon to find
Billy, the "it ain't polarized after it's reflected" is another "old hams tale." The literature does not support that fable, nor does practical experience. You will find many signals that are too wea
Joe, I 'spect I would try Lubriplate. I have some in some machinery that's been rotating every day for a decade without problems. Most industrial outfits have it. 73 Pete Allen AC5E
It's not how low a frequency, it's how high. "Faraday rotation" describes a more or less steady rotation of a radio wave's E (and H) field as that wave is propagated. Faraday rotation is a result of
Gyro rotation, first described by Micheal Faraday, is clearly described in almost any standard radio engineering textbook. To quote from Terman's Radio Engineers Handbook, 1943 edition: Page 711, fir
At present I own two of one and one of the other. Being curious I gave them a fairly close twice over. The only difference I can find is the decal on the front panel. So if I were in the market for a
One of the variations of Murphy's law states "Any job finished on time is a job unfinished." I had rather have Orion arrive late but right than on time but incomplete. 73 Pete Allen AC5E