Our club repeater antenna is high in the air. While I have not witnessed a direct lightning strike, we can see the pit marks of many direct lightning strikes on the antenna over the 15 years it has
If there is just a little current flowing (or voltage differential) it would screw up your ohm meter reading. Did you measure with the main breaker to the whole house turned off so none of the lines
Let me see if I can take a whack at this. Make sure phone and power grounds are tied together. When you get a lightning strike where do you want the power to go? Down your switch wires and coax or do
I am building an antenna rotor for a HF antenna. How fast should the antenna rotate? Looking at the motor/gear they have now it looks like it will rotate at 10 RPM, which means 6 seconds to go end to
Thanks everybody for the feedback. I will let you know on the progress. Kip -- Kipton Moravec AE5IB .- . ..... .. -... "Always do right; this will gratify some people and astonish the rest." --Mark T
I am aware that people use coax for DC power to power electronics. I have a 12V 1A (max) motor. It will be variable speed by using PWM (Pulse Width Modulation) I have an engineer that says I can powe
Our repeater antenna is located on a 180 foot water tower. We have not had a problem in the 4 years it has been up there. It is used for Skywarn nets when we have bad weather in the county. The past
When we inspected the system yesterday, we noticed none of the antennas were properly grounded to the tower where they clamped onto the upright of the railing around the top of the tower. The railing
No. The nois is bad when someone wants to use the repeater. Mobile stations as so noisy they are hard to understand. One of the NCS usually has full quieting at 25W had to go to 75W to be understood.
While the power rating (W) says you can use a 1/4 W resistor, the voltage does not. Carbon Film Resistors have maximum working voltages for their size. (From Xicon Datasheet) 1/8 W 200V 1/4 W 250V 1/
Having experience with HSMM-MESH my recommendation would be to have something that is over peoples heads and then relay it from the edge of the area where there are fewer people and where you can put
I am supervising the installation of a 60 foot Rohn 25 tower. (This means finding the people with knowledge and muscle.) It will be placed next to a 50 foot building with concrete walls, a flat roof,
I was given a used Ringo ARX2B antenna. I checked out the manual and set the three measurements to 145 MHz. When I tried to tune it, the SWR was 10:1 +/- 50 MHz around 146 Mhz. The piece of coax look
I am testing the antenna on the ground held on a fiberglass pole about 8 feet long, so the base is about 8 feet off of the ground and I am holding it up and standing under it. We have a 15 foot piece
Thanks. I will watch for that when I put it back together. Kip _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contest
Below are the results we did with 2 tuned 20m inverted V dipoles at 35 feet, in a test for interference during Field Day. The results for Orthogonal was the same, independent of which side was transm