I strongly agree. My home QTH in a Chicago neighborhood is quite noisy. I have a remote mountain QTH that is very quiet. While I haven't had a LOT of operating time there yet, I ran the CQWW160 from
Perm, 2900 This core has a resonant frequency of about 400 MHz. Below that frequency, a single turn (that is, the coax going through it) will look inductive, and above it will look capacitive. It's g
You do NOT want an isolated ground system in the sense you seem to be thinking of. All grounds MUST be bonded together. The manner in which you tie them together is important. Remember -- wire has in
That's exactly what I would do, based on what I learned as a young EE student working for Pete Johnson in his BC consulting business around 1962. Pete and Carl Smith wrote the FCC's technical regs on
Yes. There are isolation transformers, and there are isolation transformers, and some are far better than others. More to the point, HOW they are installed is at least as important as the transformer
Yes, BUT: it is the COMPLEX SUM of their impedances that will result. A ferrite choke is basically a parallel RLC resonance having very low Q. At resonance (the peak of the Z curve) it will look resi
Others may disagree, but I recommend you end feed the wire against some sort of counterpoise arrangement. Perhaps the counterpoise could be a wire dropped out the window on the opposite side of the h
Exactly. My friend KK9H has even used the HVAC ducts in his home in as part of his counterpoise. Jim K9YC _______________________________________________ See: http://www.mscomputer.com for "Self Supp
On Tue, 29 Mar 2005 05:03:53 -0900, Justin Burket (KL1RL) wrote: That is NOT my advice. My advice is to throw away the 300 ohm line and the coax. Simply extend the wire (using another piece of wire)
My cats need no attachment -- they tend to like to sit on top of the rig. See my qrz listing. Jim K9YC _______________________________________________ See: http://www.mscomputer.com for "Self Support
Yes. I'm still a fan of 75 ohm cable for dipoles that are relatively high (as a fraction of a wavelength) and otherwise in the clear, and 50 ohm cable for those that are relatively low. The reason --
Dollars can be deceiving. Palo Alto, the heart of silicon valley is nice, but not THAT nice. House prices have been nuts there for decades, and are getting that way in Chicago. My wife's daughter's h
The ground system only influences receive noise when 1) the ground system is part of the antenna (as, for example, when it is part of counterpoise; or 2) the ground system is somehow carrying noise c
Of the two VHF filters I bought a year or so ago, both were out of alignment when I tested them using HP test equipment. Both were repaired with no complaint, but it took a long time and was a PITA.
In a former life, I installed and maintained CCTV cameras. There were, at that time, several lines of environmental enclosures for outdoor cameras. Vicon and Pelco are the ones I recall from those da
For some AES (Audio Engineering Society) standards work I am doing (on EMC), I need to get a handle on the approximate field strengths used by long wave broadcast stations (150-250 kHz) in Europe and
I called up to order several more of the DX Engineering dipole baluns yesterday to build some Field Day antennas. I was told that they are discontinued, and that as a "replacement," I can order a bal
Many thanks to all who responded to my query on this topic. Several asked that I forward a summary of the replies to the list, so here goes. There is a quite detailed description of the WWVB 60 kHz t
Remember that Field Day and Sweepstakes are SHORT distance contests, which calls for a fairly high angle of radiation. You want a radiation angle that is low enough to get coast to coast, but any low
This discussion is VERY relevant to me at my remote site at W6BX. I'm not up with remote control yet, but I hope to me within a year. To perform a manual reset, I would need to buy a round trip ticke