I use whatever I can find at the lowest cost which has been mostly #16 and 18 stranded and insulated in 500-1000' reels at a local surplus shop. Ive even used #22 when the other wasnt on hand and it
A ground screen mesh extending out at least 25' from the base would reduces losses considerably since just 10-20 radials has little effect. At a prior QTH, going from 100 radials of 60-130' to spokes
Has anyone tried RG-8X PL-259 crimp connectors on RG-6? Carl KM1H Amphenol F connectors? Whoah! 73, Pete N4ZR Check out the Reverse Beacon Network at http://reversebeacon.net, blog at reversebeacon.b
My own experience with 1/2 wave verticals is that they certainly do require a good ground. Maybe a rod in a saltwater marsh is sufficient but not in many other cases. Examples: A Shakespere CB whip i
You ever wonder why a few on here are so much louder than their competition with similar installations when 1-2 keep trying to make us believe it has nothing to do with the radials beyond a small num
-- Original Message -- From: "Tom W8JI" <w8ji@w8ji.com> To: "Carl" <km1h@jeremy.mv.com> Cc: <topband@contesting.com> Sent: Sunday, December 16, 2012 11:26 AM Subject: Re: Topband: raised radials Or t
Charlie, your starting to sound like the other guy; trying to interpet my posts and spin to your benefit and getting demeaning in the process. Give me a bit more credit than that...OK... I know a bit
Charlie, you are so far off the wall Im not even going to bother with a long detailed answer since it likely wont go thru.You dont have a clue what Im trying to get across so why bother. There was ab
Right, typically a couple hundred ohms. Modeling the base Z of a thick broadcast tower is very difficult with MoM software. Changes in thickness can result in large base Z changes. Just to be clear,
<<But doesn't this merely confirm the notion that the half-wave vertical needs some kind of ground system to work against, and in addition to minimise ground loss when the base of the radiator is in
I guess I wasnt clear enough so lets start again. We both agree that the .38 db increase is at all elevation angles since the increase in efficiency at the feed doesnt change the pattern shape, just
I have been looking for information on BOGs and have not been able to find any info on measured impedance values. Other than they are low, depends on ground, etc. I thought I would relate my recent e
Post is pressure treated and has been outdoors a couple of years .Antenna is insulated with a PVC pipe sleeve .My hand does not effect it till I touch, if only 1/16 inch away .The effect is greater i
Is it really necessary to isolate the vertical from the pressure treated 4 x 4 with PVC tubing and is it really necessary to install a 1:1 balun between the antenna and feedline in this 4-square rece
As a follow up I wonder if rather than using windowline, whose transmission line performance would be subject to variations in weather, it might be better to use coax. The outside of the shield would
There is one in Portugal also, dont remember how much is still standing, havent been there for almost 20 years. The US versions were the FRD-10 and the FLR-9 and built into the 70's and the Japanese
Check the Ameritron RCS-4 circuit. Selects 4 antennas with voltages over the coax. Requires relays with excellent isolation for Beverages, the RCS-4 is poor and I eventually built my own with DIP siz
CATV installers use almost 100% quad shield in order to keep the signals inside and not cause interfering leakage (egress); FCC specs are adamant about that. These specs go back to the 70's. In more
But if you deploy bad cable and hardware into a system, you'll feel the pain a long time as it affects long-term service call volume, unhappy customers, and angry government leaders who generally hat
Actually a properly designed purpose built loop can offer a reduction in noise from the high Q selectivity offered. A 2 turn balanced loop made from 1" mostly air dielectric CATV hardline has been in