| Home |
| Search |
| Today's Posts |
|
|
|
#1
September 23rd 06, 12:05 AM
posted to rec.radio.amateur.antenna
|
|||
|
|||
Use of lattice line to feed dipole
On Fri, 22 Sep 2006 22:46:22 GMT, "John, N9JG"
wrote: I certainly appreciate the comments and advice from you and the other respondents. -- John, N9JG John, I think you will benefit from this. http://k6mhe.com/n7ws/Ladder_Line.pdf Danny, K6MHE |
|
#2
September 23rd 06, 01:48 AM
posted to rec.radio.amateur.antenna
|
|||
|
|||
|
Use of lattice line to feed dipole
An excellent article. It appears to indicate that at 7 MHz a feed line made
from 100' of Wireman 554 window line would have a loss of about 2 db when the line is wet. When the line is dry, the loss is insignificant. "Danny Richardson" wrote in message ... On Fri, 22 Sep 2006 22:46:22 GMT, "John, N9JG" wrote: I certainly appreciate the comments and advice from you and the other respondents. -- John, N9JG John, I think you will benefit from this. http://k6mhe.com/n7ws/Ladder_Line.pdf Danny, K6MHE |
|
#3
September 23rd 06, 02:50 AM
posted to rec.radio.amateur.antenna
|
|||
|
|||
|
Use of lattice line to feed dipole
John, N9JG wrote:
An excellent article. It appears to indicate that at 7 MHz a feed line made from 100' of Wireman 554 window line would have a loss of about 2 db when the line is wet. When the line is dry, the loss is insignificant. I've often wondered how someone "wets" a vertical feedline without using soap. -- 73, Cecil http://www.w5dxp.com |
|
#4
September 23rd 06, 03:37 AM
posted to rec.radio.amateur.antenna
|
|||
|
|||
|
Use of lattice line to feed dipole
On Sat, 23 Sep 2006 01:50:54 GMT, Cecil Moore
wrote: I've often wondered how someone "wets" a vertical feedline without using soap. Cecil, Just drop by my qth anytime between November and May. Danny, K6MHE |
|
#5
September 23rd 06, 03:48 AM
posted to rec.radio.amateur.antenna
|
|||
|
|||
|
Use of lattice line to feed dipole
Danny Richardson wrote:
Just drop by my qth anytime between November and May. How do you keep the water on the feedline? Mine always beads up and falls to the ground. -- 73, Cecil http://www.w5dxp.com |
|
#6
September 23rd 06, 04:24 AM
posted to rec.radio.amateur.antenna
|
|||
|
|||
|
Use of lattice line to feed dipole
On Sat, 23 Sep 2006 02:48:16 GMT, Cecil Moore
wrote: Danny Richardson wrote: Just drop by my qth anytime between November and May. How do you keep the water on the feedline? Mine always beads up and falls to the ground. I don't do anything. Ever heard of Oregon mist? When I first moved up here on the northern California coast I put up a doublet feeding it with window line. The next spring when I dropped the antenna for some maintenance I found moss growing on the feed line.Need I say it was replaced with something better? Danny |
|
#7
September 23rd 06, 10:26 PM
posted to rec.radio.amateur.antenna
|
|||
|
|||
|
Use of lattice line to feed dipole
On Fri, 22 Sep 2006 20:24:59 -0700, Danny Richardson
wrote: On Sat, 23 Sep 2006 02:48:16 GMT, Cecil Moore wrote: Danny Richardson wrote: Just drop by my qth anytime between November and May. How do you keep the water on the feedline? Mine always beads up and falls to the ground. Here's a photo of a piece of Danny's line (Wireman 552), after it set around in the Arizona 5% humidity for a while It was still green when I got it. http://www.k6mhe.com/n7ws/MossyLine.jpg What do you suppose the dielectic properties are when that stuff totally bridges the line and is wet? I don't do anything. Ever heard of Oregon mist? When I first moved up here on the northern California coast I put up a doublet feeding it with window line. The next spring when I dropped the antenna for some maintenance I found moss growing on the feed line.Need I say it was replaced with something better? |
|
#8
September 23rd 06, 12:05 PM
posted to rec.radio.amateur.antenna
|
|||
|
|||
|
Use of lattice line to feed dipole
Cecil Moore wrote:
Danny Richardson wrote: Just drop by my qth anytime between November and May. How do you keep the water on the feedline? Mine always beads up and falls to the ground. No it doesn't!! You just can't see what surface tension causes to 'stick' |
|
#9
September 23rd 06, 05:33 AM
posted to rec.radio.amateur.antenna
|
|||
|
|||
|
Use of lattice line to feed dipole
The author used a wetting agent.
"Cecil Moore" wrote in message m... John, N9JG wrote: An excellent article. It appears to indicate that at 7 MHz a feed line made from 100' of Wireman 554 window line would have a loss of about 2 db when the line is wet. When the line is dry, the loss is insignificant. I've often wondered how someone "wets" a vertical feedline without using soap. -- 73, Cecil http://www.w5dxp.com |
|
#10
September 23rd 06, 08:23 PM
posted to rec.radio.amateur.antenna
|
|||
|
|||
|
Use of lattice line to feed dipole
John, N9JG wrote:
The author used a wetting agent. "Cecil Moore" wrote in message m... John, N9JG wrote: An excellent article. It appears to indicate that at 7 MHz a feed line made from 100' of Wireman 554 window line would have a loss of about 2 db when the line is wet. When the line is dry, the loss is insignificant. I've often wondered how someone "wets" a vertical feedline without using soap. So is the lesson that Ladder line sucks, or is it that we shouldn't wash our ladder line with soap and water? 8^) Has anyone run tests on what "real" (open) ladder line does when you spray it with wetting agent and water? - 73 de Mike KB3EIA - |
| Reply |
| Thread Tools | Search this Thread |
| Display Modes | |
|
|
Similar Threads
|
||||
| Thread | Forum | |||
| Antenna reception theory | Antenna | |||
| SWR - wtf? | CB | |||
| SWR - wtf? | Antenna | |||
| swr question | Antenna | |||
| Antenna Suggestions and Lightning Protection | Shortwave | |||
Hybrid Mode
