Call Search
     

New to Ham Radio?
My Profile

Community
Articles
Forums
News
Reviews
Friends Remembered
Strays
Survey Question

Operating
Contesting
DX Cluster Spots
Propagation

Resources
Calendar
Classifieds
Ham Exams
Ham Links
List Archives
News Articles
Product Reviews
QSL Managers

Site Info
eHam Help (FAQ)
Support the site
The eHam Team
Advertising Info
Vision Statement
About eHam.net

   Home   Help Search  
Pages: Prev 1 [2]   Go Down
  Print  
Author Topic: Using RG-58 as a DC Line  (Read 836 times)
K0BG
Member

Posts: 9860


WWW

Ignore
« Reply #15 on: March 31, 2009, 06:43:25 AM »

Take a 10 foot piece of good quality RG8, and put a load of 20 amps on it at 13.8 volts, and measure the voltage drop. The results speak for themselves.

Alan, KØBG
www.k0bg.com
Logged

AA4PB
Member

Posts: 12832




Ignore
« Reply #16 on: March 31, 2009, 06:44:51 AM »

The bottom line is that there is no good technical reason to use coax for the +12V DC power line. You can get the appropriate size 2-conductor (red/black) power cable at nearly any automotive supply store. The insulation is better suited for the temperatures likely to be encountered in the engine compartment and is less susceptible to abrasion and damage by oil or other fluids that might get on it.
Logged
WX7G
Member

Posts: 6035




Ignore
« Reply #17 on: March 31, 2009, 09:29:48 PM »

K0BG: I stand corrected the total resistance of 1' of RG-213 is 3.2 m ohms. A 10' length has a resistance of 32 m ohms. 20 amps gives a voltage drop of 0.64 volts.

Link to the datasheet:

http://www.romkatel.ro/cataloage/pdf/eupen/RG213.pdf
Logged
Pages: Prev 1 [2]   Go Up
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.11 | SMF © 2006-2009, Simple Machines LLC Valid XHTML 1.0! Valid CSS!