Steve, the theory for using an inert filler is that the space inside the connector is filled, leaving no room for water. Valid? Who knows?! 73, Gerald K5GW In a message dated 10/5/2011 2:28:09 P.M. C
Bruce, what you describe sounds more like a cold solder joint, loose connection, or relay contact problem. Typically a short due to a flashover stays shorted/does not heal itself. You might try conne
Weren't the Wilson rotors made by the old Kenpro Co.? Maybe a KR500 manual might also serve the purpose. 73/K5GW In a message dated 10/18/2011 6:51:27 A.M. Central Daylight Time, greenacres113@charte
You can salvage pretty hefty Ubolts from cable clamps. The U bolt part of a clamp is quite a bit larger than the cable size it is made for so you have to measure the space between legs to find the de
Hi Steve, the only issue in using the saddle is that it uses up some of the Ubolt leg length. If the material being fastened to the tower rung is thin enough, there is no issue. Metal utility boxes a
Hi Tom, resistance is very low. The most likely problem is with the brushes. With enough use, the brushes wear out. The copper face of the commutator can also wear and need refacing. Kind of like in
Don't take this as a recommendation but rather as a data point: I have had great success with pinning masts using 4 X 3/8" grade 8 bolts. Two pinning holes are drilled completely through the mast to
Hello all, correct me if I am wrong but doesn't moving the capacitor to the rotator free up a couple of conductors that can be repurposed to lower the voltage drop to the motor? 73, Gerald K5GW In a
Should have also mentioned that the capacitors are notoriously failure prone. There are far better and longer lasting capacitors available from air conditioning parts suppliers. As the original capac
Hi Grant, what balun are you using and how is it connected to the driven element? The feed impedance is affected by the balun connection wire length and spacing and needs to be just as shown in the a
Hello OM, you might try using 2m and a multielement hand held yagi to further pin point the source. The receiver needs to be on SSB as you probably already know. You can further refine the technique
Hi Gene and Mike, my recollection is there were no 90 mph calculations for the BX series towers. The conversion from 70 to 90 mph is not simple or straightforward. The problem is that the tower itsel
Mike, this is not addressed to me but here is a reply anyway: Wire rope works perfectly well in applications like this and it is available at many home and farm centers and Tractor Supply stores ever
Hi Ken, the statement "low swr does not indicate resonance" is a bit narrow. Perhaps "does not unnecessarily indicate resonance" would be more accurate. If the feedline has a high loss, the swr would
Hi Ken, we have a differing definition of what constitutes resonance: You are talking about the radiating element only and I am talking about the radiating element plus everything else that constitut
Hi Ken, the statement in the Antenna Book about the waves on the radiator bouncing back and forth and being reinforced by the next wave to achieve resonance is exactly right. But, the point where one
Hi All, N connectors seem to get a bad rap for some reason. I have used them in my eme systems on 2m and 70cm for over 20 years and find them to be very reliable. There have been quite a few contests
Hi Jim, you likely already make your own. It will be hard to beat a DIY adapter made with a short length of RG213 or LMR400 and N female one end/ UHF male other end. You will need to upgrade your sta
Hi John, as already mentioned, the 80% guying is subject to change with proper backup calculations. Also, the forces on 72 ft guy spacing will be very similar with a large antenna at 110 ft using a m
Hello Dick, your numbers are telling you that the feed point is already inductive. A series capacitance of 344 ohms should cancel the inductance and result in a very low vswr at the frequency of your