In my most recent posting on this subject I said: "...I'm puzzled by how the feed current at the base of any antenna, regardless of its length, will always be at a maximum at its base. A half-wavelen
It is of course possible to achieve a better match at an antenna's feedpoint by altering the antenna's total length ("simply adjusting the length of the horizontal wire"), but doing so will change t
Buzz, Instead of 500-foot rolls of insulated wire, I found it more cost effective to buy a 1,000-foot roll of 14-2 with ground wire from Home Depot. I stretched about 200 feet at a time along my prop
For one of the early ARRL Topband contests in the 1970s I, then as WB2URU, rented a tank of helium and inflated a World War 2 surplus balloon to support a quarter-wave vertical. Everything went well
Indeed, his health was lacking, and probably increasingly so. While indoors, I was unable to converse with him at any length because he needed to excuse himself for cigarette breaks. 73, Charles, W2
I should like to offer comments on and some alternative recommendations for the described construction of the 66-foot long FCP. I homebrew my open-wire feedlines, using #14-gauge solid copper wire, e
My radial field consists of 55 radials, 75' to 150' in length, buried 0.5" to 1" deep. My coax feedline, encased by a 1.25" gray pvc conduit, is 12'' deep and 80' long. It passes beneath several radi
Julius, You say that to your system with its isolation transformer you ADDED a common mode choke. I can understand how you might have REPLACED the isolation transformer with the common mode choke, bu
Guy, Your text is very instructive. I hope I'm not the only follower of this thread who up until now thought that the shield of the coax feedline was acquiring undesired current by capacitive couplin
Nope. With 100 Ohms per radial and 60 of them all the same and in parallel with each other, one gets 1.66666 Ohms; close enough. 73, Charles, W2SH _______________________________________________ UR R
The February and April 2012 issues of RadCom (Radio Society of Great Britain's monthly publication) treat the matter of interference from LED lighting. A 4W LED spotlight, with three series-connected
** Towards the end of the above reference mention was made of a Mexican BC station using a slanting parasitic reflector (probably wire) in conjunction with its vertical tower radiator. Have Topbande
Herb's suggestion is worthy, but needs a qualification as to the kind of tape to use. Over time the adhesive layer of just about all tape will separate from the tape itself. This will happen when ins
I would be grateful to learn from readers particulars of these relays, such as: whether used in connection with receiving or transmitting antenna systems, operating coil voltage, maximum rated curren
I am 30 miles due west of NYC. I receive it plenty loud on 1.810540 mHz. For a while this evening I experienced only about +/- 5dB of QSB , but now that QSB is running +/- 15 dB. Therefore it's got t
Incorrect date and day. According to NAQCC their annual NAQCC 160m sprint will occur in North America on FRIDAY, 15 January 2016. This can be seen at: http://www.naqcc.info/SprintEastern.txt 72, Char
Stew was a magnificently correct person. His distinctive white lettered callsign on a background gracing his slightly oversize, but legal to suit USPS size limits, QSL card is wall candy in my shack.
Gary, Given the 50' maximum height of a presumably level catenary line supported at its ends, there are two things you can do to significantly improve the performance of the 50' vertical wire hanging
Bruce, "...in my area, the most stable earth moisture is at grass/vegetation root level..." Are you are in fact saying that to be "stable", that is to say, remain the same day in, day out, a "BOG" ne