[CW] High Power Coax

[Richard Knoppow]

    In "Radio Antenna Engineering" by Edmund A. LaPort he shows a 12" 
coaxial line at a transmitting site for WJZ built for 500KW broadcast 
service. Nitrogen filled. The super power was never approved and WJZ 
(now WABC) moved to another site after a time. Of course, 500KW carrier 
means 2 megawatt peak for AM.

On 4/13/2024 2:17 PM, sbjohnston--- via CW wrote:
> 
> Biggest I've used in my radio stations has been 3-1/8" rigid coaxial 
> line.  Dielectric is dry air or nitrogen.  Mounting and hangers have to 
> allow for the considerable expansion hot days versus cold nights for 
> hundreds of feet of this line.
> 
> Some VHF TV stations I've worked with had the 6-1/8" size.
> 
> 
> Steve WD8DAS
> 
> sbjohnston at aol.com
> http://www.wd8das.net/ <http://www.wd8das.net/> <http://www.wd8das.net/>
> http://af4k-crystals.com <http://af4k-crystals.com>/
> --------------------------------------------------------------------
> Radio is your best entertainment value.
> --------------------------------------------------------------------
> 
> 
> 
> 
> 
> 
> On Friday, April 12, 2024 at 03:34:56 PM HST, D.J.J. Ring, Jr. 
> <n1ea at arrl.net> wrote:
> 
> 
> 50 Ohm coax sections. The inner conductor is 6-1/8 inch hardline outer 
> conductor. Big stuff. It easily handles 4 Megawatts peak power or about 
> 360 kW continuously.
> 
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-- 
Richard Knoppow
Los Angeles
WB6KBL
SKCC 19998