[TowerTalk] Coax Losses on 160 and 75?

[Kevin]

So were all talking about the same stuff.

Manufacturer's Part Number: /DXE-213U-1000/
Coaxial Cable Type: RG-213/U
Coaxial Cable Jacket Outside Diameter: 0.405 in.
Coaxial Cable Jacket Material: PVC, Non-contaminating, Type II-A
Center Conductor Gauge: 12.5 AWG
Center Conductor Material: Bare copper
Center Conductor Construction: 7 strand - 0.0296 in.
Dielectric Material: Solid polyethylene
Dielectric Outside Diameter: 0.285 in.
Shield 1 Construction: Braided
Shield 1 Material: Bare copper
Shield 1 Percent Coverage: 96-97
Loss Per 100 ft. at 30 MHz: 1.0 dB
Velocity Factor Percentage: 66
Coaxial Cable Length: 1,000 ft.
Assembled: No
UV-Resistant: Yes
Direct Bury: Yes


DXE Part Number: *DXE-11U*
Coaxial Cable Type: RG-11/U
Coaxial Cable Jacket Outside Diameter: 0.405 in.
Coaxial Cable Jacket Material: PE, Type III
Center Conductor Gauge: 14 AWG
Center Conductor Material: Bare copper
Center Conductor Construction: Solid
Dielectric Material: Gas injected foam polyethylene
Dielectric Outside Diameter: 0.280 in.
Shield 1 Construction: Braided
Shield 1 Material: Bare copper
Shield 1 Percent Coverage: 97
Loss Per 100 ft. at 30 MHz: 0.7 dB
Velocity Factor Percentage: 84
Assembled: No
UV-Resistant: Yes
Direct Bury: Yes


//*C*oaxial Cable Type: RG-6/U
Cable Connector End 1: Type F, male
Cable Connector End 2: Type F, male
Coaxial Cable Jacket Outside Diameter: 0.300 in.
Coaxial Cable Jacket Material: PVC, Non-contaminating, Type II-A
Center Conductor Gauge: 18 AWG
Center Conductor Material: Copper-clad steel
Center Conductor Construction: Solid
Dielectric Material: Gas injected foam polyethylene
Dielectric Outside Diameter: 0.178 in.
Shield 1 Construction: Aluminum bonded polyester tape plus aluminum braid
Shield 1 Material: Aluminum foil/aluminum braid
Shield 1 Percent Coverage: 100
Shield 2 Construction: Aluminum bonded mylar tape plus aluminum braid
Shield 2 Material: Aluminum foil/aluminum braid
Shield 2 Percent Coverage: 100
Loss Per 100 ft. at 30 MHz: 1.1 dB
Velocity Factor Percentage: 83
UV-Resistant: Yes
Direct Bury: Yes

This what gets installed by Mediacom cable and the only one of the four 
with a foil second shield. Comscope sells a gazillion miles of this 
stiff. Because of the smaller diameter, .300 inches compared to 4.05 I 
don't see how this could be mistaken for RG11U.

DXE Part Number: *DXE-8U-1000*
Coaxial Cable Type: RG-8/U
Coaxial Cable Jacket Outside Diameter: 0.405 in.
Coaxial Cable Jacket Material: PVC, Type I
Center Conductor Gauge: 11 AWG
Center Conductor Material: Bare copper
Center Conductor Construction: 7 strands of 21 AWG
Dielectric Material: Gas injected foam polyethylene
Dielectric Outside Diameter: 0.285 in.
Shield 1 Construction: Braided
Shield 1 Material: Bare copper
Shield 1 Percent Coverage: 95-97
Loss Per 100 ft. at 30 MHz: 0.9 dB
Velocity Factor Percentage: 81
Coaxial Cable Length: 1,000 ft.
Assembled: No
UV-Resistant: Yes
Direct Bury: No

I have never used RG8U. I prefer RG213.


On 8/7/2016 12:13 PM, Jim Brown wrote:
> On Sun,8/7/2016 1:04 AM, Jeff AC0C wrote:
>> I really really do appreciate all of the email attempting to rectify 
>> my misunderstanding of proper coax line terminology.  However that is 
>> a debate of miniature that I'm sure the original poster is not asking 
>> about.   The fact is if you lined up 10 hams and showed them a roll 
>> marked RG11 at a hamfest, I would guess at least 9 of them would 
>> expect it to the be foil + lousy braid stuff of the CATV era.
>
> Perhaps I lead a sheltered life. I've never seen CATV RG11 in the 
> flesh, only in catalogs.  And I've been no stranger to flea markets 
> for most of my adult life. I've seen lots of CATV stuff labeled RG6, 
> I've used a lot of it feeding RX antennas. 40 years ago, I even got 
> paid to install some of it in locations as diverse as Chicago town 
> homes and Sears Tower. :)
>
>> The fellow was asking about what he could use that was cheap. 
>> Commonly referred to "RG11" - meaning the cheap stuff from the CATV 
>> type (whatever the proper nomenclature is for that) - works fine in 
>> ham applications.  That is the point of my comment.
>
> Yep -- for a while, and as long as it doesn't get wet. And it has more 
> loss than RG11 made from copper.
>
> 73, Jim K9YC
>
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-- 
R. Kevin Stover
AC0H
ARRL
FISTS #11993
SKCC #215
NAQCC #3441



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