Actually any type connector needs the water intrusion protection. Some types are inherently more resistant to water intrusion but none are totally water proof. I have the green and corroded parts fro
Jim, I can tell you from first hand experience that a pair of UHF connectors and double female for a splice will raise the vswr on 2m from flat to about 1.5:1. Now in some circles that is no big deal
The 7-16 Din connectors are wonderful They are readily available for Heliax and LMR 600 and larger cables. Ebay has plenty for Heliax and Times Microwave Cable distributors have or can get them for L
John, Texas Towers sells RG213 that is made to same specifications as Belden 8267. I know that because I wrote the spec for the cable. I use the stuff myself and can tell you that it is good coax. Th
If I were a coax manufacturer I would down play the importance of a non-contaminating jacket as well. Can you say "contamination is our friend - fire up the coax machine"? I well remember seeing the
Please feel free to quote me on this: "long masts are not substitutes for tower sections" The justification for a long mast is when antennas are stacked or several antennas are turned by a single rot
Martin, the length of the coax center conductors showing outside the braid can act as small antennas and radiate signal from one center conductor through the air to the other center conductor. Shorte
Easier than riding a bicycle; just wind them onto the guy wire with a few inches of guy wire hanging out at the thimble/grip loop. If you leave too much guy wire hanging out, trim it with small bolt
Jim, there was an old DOS program in the ARRL Antenna Book software for modeling mobile antennas. A google search will probably turn it up from other sources. This program expects coil loading but th
Jim, a further thought on the motor driven tuner: As you know, the loss in the variable C will be negligible. The loss in a loading coil is related to the Xl and Q. The more Xl, the greater the loss.
Seems that everyone has forgotten the Aluminum replacement program at Texas Towers. There is no need for all the hard work cleaning and polishing all those grubby antenna elements. Replace with new o
Just for clarification about LMR900: There absolutely is a coaxial cable called LMR900 made by Times Microwave and sold through their distributors. It is a low loss and quality cable with performance
Joe and others, I have installed many connectors on LMR400/500/600 both standard and U versions. I can't see any way to make a positive connection between the connector body and the INSIDE of the foi
Jim, if the braid and foil were in poor contact, they would constitute a very low impedance transmission line with the foil acting as center conductor and braid as outer conductor. After a very short
Rick, please clarify the 37 @-45 degrees info. What is that? 73, Gerald K5GW In a message dated 7/18/2010 11:00:39 P.M. Central Daylight Time, rick.craig@n6nd.com writes: Scott, you need to shorten t
Thanks Steve. The series and parallel forms of notation are very intuitive; easy to visualize. Can you enlighten me/us on the advantages of using polar notation? There has to be a good reason for usi
Fred, please tell us more about your ground loop problem. What are you seeing that made you add the extra ground wire? Did something get damaged or just what was the issue? Much of the equipment in u
Paul, with 2 phases, wouldn't they be phased at 120 degrees apart instead of 180? Seems that would cause problems with 220/240vac loads. 73, Gerald K5GW In a message dated 8/2/2010 7:36:13 A.M. Centr
Sorry Paul, I misunderstood your information. I see now that you were talking about neighborhood primary power distribution, not individual home secondary power source. I see the single phase primary
You can determine loss fairly closely with a decent vswr measurement. If you can disconnect or short the coax at the far end, the vswr measurement can be converted to return loss and actual loss is o