I have not modeled this and wonder if there is any prediction of added losses when refraction is utilized? 73, Gerald K5GW In a message dated 11/1/2007 4:26:51 P.M. Central Daylight Time, xdavid@cis-
Kim, assuming the 65 +j445 is a good number, adding -445 ohms (198 pF) in series with the feed should result in 65 +j0. This in turn would yield a vswr of 1.3. So, a good first step would be adding t
Hello All, All this talk about converting the 402CD to Moxon has got my curiosity up. I am using a 402CD here. Can someone please give me the location of this mod info. Many Thanks in advance... 73,
Not to get into am argument about the best balun, I agree that DX Engineering has a great balun. BUT, there are certainly other ferrite choke/coax baluns that work well and also are worth owning: Som
I am quite concerned about all the aluminum cleaning chat recently. It is well known that any of these abrasive cleaners and pads will leave micro-scratches in the aluminum surface. Due to the skin e
Terry, the tape is installed under tension. This makes it grip the connector surface very tightly, filling any voids that might be present. Wonderful stuff and also available from 3M in a linerless v
The main value for such items is in the scrap metal. Those old microwave horns were quite heavy and made of aluminum and the transmission lines were all copper if my recollection is correct. You migh
Steve, going back to fundamentals, you might try installing a Tee connector on the output of the analyzer and connecting a 50 ohm load to one leg of the Tee. With the other leg of the Tee open you sh
I didn't see a response to this so here goes: Back in those days, wind load calcs were based on 26 pounds per sq ft at 80mph. With a wind load of 92 pounds, that equates the sq ft to 92/26 or 3.53 sq
I can only speak for Texas Towers concerning the SSB25G: The dealer price is $206 vs $82 for the BPC25G. We get a call maybe once every year or two for one so there is not enough interest to stock th
Bill has it correct: Rohn drawing# C731105 R5 shows it just as Bill described. 73, Gerald K5GW In a message dated 6/25/2008 3:41:12 P.M. Central Daylight Time, paul.kelley.n1bug@gmail.com writes: No.
If you google "square conductor transmission line" several references appear. One of them on the first page claims accurate impedance calculations. 73, Gerald K5GW In a message dated 7/1/2008 2:50:32
I bet that would get the HOA and neighbors stirred up! 73, Gerald K5GW In a message dated 7/10/2008 3:06:44 P.M. Central Daylight Time, EL34GUY@aol.com writes: Awesome Tower, Great price, I have 7, 6
This sounds like a "Tele-tow'r" manufactured in Enid Oklahoma during that time frame. The towers all had a painted finish. The owner of the company is now deceased and no one picked up the manufactur
Your math looks ok; but this is without any wind blowing on the structure! What will the forces be with 70mph winds? 73/k5gw In a message dated 7/30/2008 11:18:00 P.M. Central Daylight Time, K8RI-on-
Art, I wonder if a series of short heat shrink tubes might be substituted for the missing boot? Each one maybe an inch or inch and half long, overlapped maybe half to three quarters inch, say a total
One small issue in this thread: The large wires should connect to the brake leads in a T2X or Ham 4 unit. I saw a couple of mentions about large wires connected to the motor. Yaesu rotators have two
If you do a google search on "Force 12", the first hit is their home page. Listed there are five different ways to contact them. The new owner is very interested in customer service and no doubt can
Heights Tower web site has a technical section and a tutorial on their tower designs. In the tutorial there is a table of tower section specifications related to 6061-T6 aluminum. One specification i
Most of these foam filled cables have a velocity factor in the 80 to 85% range. You can do a rough calculation based on that, the center conductor o.d. and outer conductor i.d. to approximate the cha