[TowerTalk] Coax Losses on 160 and 75?

[Kevin]

Whoopsy, 0.405 diameter instead of 4.05.


On 8/7/2016 2:21 PM, Kevin wrote:
> 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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