Hi Folks, Thanks to Steve Weber for his prototype photo of the folded conical helical antenna on the link below: This is with the one monopole mounted, and ready for more to be wound. I really apprec
Bob, It is easier than you think if it is the modern pop off the front square plastic cover on the meter. The things that make them sluggish are either dirt in between the rotating armature coil and
If your parallel line is no more than 10 per cent unbalanced, it should NOT be producing any radiation from the line. Look to your antenna installation, ground loops and other causes of RF in the sha
Good suggestions Phil, well you can see, I am not a regular user of "Bounce" sheets! Hi! But I do use the air puff to move a meter needle up scale, when I want to check the action, a gentle puff from
Al raises a valid question, but I think the answer is obvious. Specs are MORE UNIFORM rig to rig, with modern printed circuit robotic assembly than in the days of hand wired tube final rigs. There is
The measurements by the Wheeler Cap method, the accepted efficiency test for small antennas, show greater than 90 per cent for the 13 inch high cone, using 12 inch slant height, and 16 inch diameter
Al, It is somewhat unconventional to all of us used to single wire antennas. That is why it works better than the Isotron, the EH, or the other small antenna ideas that do not contain full resonant l
Recent measurements of such a line on the technical lists reported no noticeable radiation from such a line at a distance. Perhaps a measurement study by several would be helpful. Stuart K5KVH
Well, I do not disagree that capture area is all important to great antennas. But for the condo owner with antenna restrictions, he is never going to see the antenna farms that Tom and I love to buil
Brian, A leaky transistor is one that was manufactured with a defect, and that is NOT Ten Tec's fault. It is impossible to test every transistor coming off the production line, and so lot sampling QC
The main thing is do the best balance you can, and keep any antenna line away from computer generated hash, which is a fact of modern radios. One of the best conventions is to keep radio analog groun
Anyone have about four spare 2N3553's and four 2N4427's? Jim is trying to repair a QRP rig or two. One Ten Tec and one Heath HW 8. Jim is not on all the lists, so just send me your info, and I will l
If you can find a sheet of mumetal foil, you can put it below the built in speaker and reduce its effect on the coil. Even a steel sheet might be enough shield for this effect. It has to be larger ar
Here is the photo link published yesterday: "Did you look at the pictures? http://www.qsl.net/kd1jv/cone.HTM" That is the start of one, with one parallel line element wound, and holes drilled for a s
Hi Tom, I NEVER claimed the folded conical Helix was better than all other antennas, I said it was more efficient than some small antennas of comparable volume which it is. The Isotron and most other
John, No, the Wheeler cap does not appear in the ARRL books. It is something from professional antenna practice back to Wheeler of Hazeltine and Brown et al at RCA. It was likely in RCA Reviews their
Gosh Tom, Since you sent me a comment after my FIRST posting on the conical Helix to Ten Tec reflector and others, I thought you had READ the post! Sorry if you missed the first posting of the paper
I always thought that Ten Tec folks would also be interested in novel antennas of possible use to their stations. I thought there was interest in scientific discussions and discourse here. Some on th