[TowerTalk] coax

[Pat Barthelow]

Interesting conversation, motivated me to to google coax    peak power    
average power

and got a lot of interesting stuff:

http://www.psibroadcast.com/coax-engelec.asp

http://www.astrolab.com/10.asp

http://www.amphenolrf.com/rf_made_simple/techquestions.asp

http://it.sns.ornl.gov/asd/restricted/pdf/sns0102/sns0102.pdf#search=%22Coax%20%20%20%20%2B%22Peak%20Power%22%20%20%20%20%2B%22Average%20Power%22%22

http://www.microwaves101.com/encyclopedia/powerhandling.cfm

73, DX, de Pat AA6EG aa6eg at hotmail.com;
Skype:  Sparky599
http://www.youtube.com/watch?v=_lfWQybXHeM&NR
http://www.youtube.com/watch?v=bbCcGQXuqXw&NR


>From: "Mike Clarson" <mclarson at rcc.com>
>Reply-To: mclarson at rcc.com
>To: "'Craig Clark'" <jcclark at wildblue.net>,<towertalk at contesting.com>
>Subject: Re: [TowerTalk] coax
>Date: Wed, 4 Oct 2006 12:25:56 -0400
>
>Craig: You are correct, of course. The rating I quoted was the "Peak Power"
>rating, and it was an attempt to add some levity to an otherwise dry
>discussion. My refusal to use "emoticons" causes these attempts to get
>missed sometimes.  Average power rating depends on frequency. CNT(Andrew)
>and LMR (Times)average ratings are the same at every frequency listed (5.5
>KW at 30 mHz) The WBC (CommScope), while also 5.5 kW @ 30 mHz, average 
>drops
>to 0.82 kW at 960 mHz vs 0.89kW for CNT and LMR. Apparently the breakdown
>voltage of the WBC is a bit lower than the others, and the attenuation is a
>hair higher at some frequencies. My understanding is peak power is what the
>cable can handle without breaking down, assuming standing waves do not 
>cause
>the breakdown voltage to be exceeded, and the average power is the power 
>the
>cable can handle continuously without melting. There is probably an
>operating temperature range and duty cycle rating involved in that spec
>also. 73, Mike, WV2ZOW
>
>-----Original Message-----
>From: towertalk-bounces at contesting.com
>[mailto:towertalk-bounces at contesting.com] On Behalf Of Craig Clark
>Sent: Wednesday, October 04, 2006 10:51 AM
>To: towertalk at contesting.com
>Subject: [TowerTalk] coax
>
>
> >Message: 3
> >Date: Tue, 3 Oct 2006 18:27:25 -0400
> >From: "Mike Clarson" <mclarson at rcc.com>
> >Subject: Re: [TowerTalk] LMR-400 vs. CommScope vs. Belden
> >Check out CommScope WBC 600 and Andrew CNT-600. The Andrew is a
> >direct substitute, the CommScope is a bit different. Watch the power
> >rating--CommScope is only 10.4 kW while the others are 40 kW!--Mike, 
>WV2ZOW

>Since you have pbly looked, are those ratings at the same frequency
>for the Andrews and Cscope cables? My Times book rates LMR600 at 5.5
>KW @ 30 MHz

>73, Craig Clark, K1QX