I have been running a remote station for over three years. I use a private connection, and it is not intended for anyone else to use. There is enough interest that QST has run several articles about
And remember, you can still hear with the antenna mistuned... enough to allow you to find the first station to call or a clear calling frequency anyway. Larry N8LP ___________________________________
I would expect two factors at play. The main factor is probably the large surface area of metal up there to collect the static. The other is the broad bandwidth. A better solution in terms of precipi
I just recently added a new copy of LaPort's "Radio Antenna Engineering" to my reference library. I got it from LuLu.com. They have a free pdf of the book (also available elsewhere), or you can buy t
One point to make... They are using vertically mounted 2-element SteppIR beams. Based on the pictures I've seen, they may be phasing them as a broadside array as well. Either way, they certainly have
For inexpensive driver boards, look at http://www.stepperboard.com/. These can control multiple motors from a serial port, so you can computerize your control or use manual tuning with switches. I ha
Pat, the boards at the site I suggested will work in about a half-dozen different ways, and will drive a pair of motors with more than enough torque to do the job. I have used them to drive caps as w
No, as long as the balun is properly designed. 25 ohms is a pretty typical value for yagi feedpoints. Most manufactureres supply a matching device to 50 ohms, but the actual feedpoint is probably in
Just a side note that I read recently. Magnetic North is moving. At current trends, it will eventually hange countries, although given enough time it will probably migrate back. At one point ( a long
Only a couple that I can think of... You don't have to wait for it to tune There are no electronics. The disadvantages are... Weight Gain F/B Ease of assembly and erection Survivability in storms Har
SteppIR is basically three entrepreneurs, who now have more orders than they can handle. Elecraft is two entrepreneurs who are likewise enjoying success. I have purchased from both of these companies
I would suspect an intermittent connection... either a coax connector or maybe a joint between tower sections. You should bridge the sections with straps. Also the rotator bearings should be bridged
I have had a HD receiver for 5 years, and it looks great. Reception is either perfect or not there at all... not much in-between. Range is not as good as analog TV, but decent. I live west of Detroit
My LP-100 wattmeter, as featured on the cover of the Jan/Feb QEX, and shown at Dayton 2005 at the SteppIR booth, is now ready for sale. The LP-100 has excellent accuracy over a wide dynamic range (50
Larry N8LP _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contesting.com http://lists.contesting.com/mailman/listinfo
The stripline coupler was under development when the article was submitted to QEX, but I abandoned it for a couple reasons by the time the article was published. There are two BNC cables between the
Not that it will solve your problem, but one thing to watch out for, especially with Yaesu rotators, is noise from the motor causing problems with the PIC. You need to ground the controller well to m
An excellent source of quality dummy loads is http://ridgeequipment.com/store/page1.html Check out the 75W ones for $9.00. I have checked these out on my HP VNA and they are excellent. Only drawback
Another option is to use the 30W, TO-220 style thick film resistors from Caddock. Mouser sells them. They are available for 50 ohms, are 1% precision and non-inductive... and are also very good. If y
Do they give Tesla credit for the invention of polyphase AC? I wish I had known about the museum. We were in Pittsburgh last summer and went to the Carnegie Museum of Art, Falling Waters and the Phip