[Antennas] Antenna lead in coax

Alan C. Zack [email protected]
Thu, 27 Nov 2003 13:49:04 -0800


Well, I remember having to learn how to use a Pickett slide rule the
first week of Electronics School long before there were calculators
(and having to take ham exams at the FCC office, drawing block
diagrams, fixing schematics, etc).  I used to fly the actual planes
that are now in museums or are static displays.  How's that for an old
Fart?

Robert Lay wrote:
> 
> Jim must be a really old fart - when was the last time anyone referred to
> MHz as Megacycles?
> 
> I remember when I worked at WCSI in 1948 with another young broadcast
> operator who drove a Harley Davidson 125. The announcers would sometimes
> give the station break with "WCSI, operating on 93.7 Megacycles and 1
> Motorcycle"
> 
> Bob Lay (W9DMK) in Dahlgren, VA
> http://www.qsl.net/w9dmk
> ----- Original Message -----
> From: "Tom Horton" <[email protected]>
> To: "Jim Isbell" <[email protected]>; <[email protected]>
> Sent: Tuesday, November 25, 2003 11:39 AM
> Subject: Re: [Antennas] Antenna lead in coax
> 
> >
> > >I am planning a linear capable of 2.5KW PEP on SSB up to 30 MC. (4-1000A
> > >at 4500-6000 volts plate)
> >
> > Really, 2500 watts PEP ?
> > The last time I looked it was still 1500 watts PEP. Of course, I'm old and
> > may have missed something.
> > Why the overkill?
> > Tom K5IID
> >
> >
> >
> >
> > At 04:01 11/25/03, you wrote:
> > >I am planning a linear capable of 2.5KW PEP on SSB up to 30 MC. (4-1000A
> > >at 4500-6000 volts plate)
> > >
> > >I want to make sure my antenna cable can handle it.
> > >
> > >In looking at cables I find that LMR-200 (Hi Performance RG-58) is
> capable
> > >of 1050 watts at 30 Mhz.  Just how much does that translate to in power
> > >level SSB PEP?  Is there a rule of thumb for compairing cable power
> > >capability when I assume that the number usualy qouted is for CW power
> > >capability?
> > >
> > >RG213 and LMR-400 look like they could easily handle my power output but
> > >are a bunch more dollars.
> > >
>

-- 
__________________________________________________________________________                       
                                     Alan Zack
                     Amateur Radio Station K7ACZ
                         Las Vegas, Nevada, USA
          Quality Engineer, The Boeing Company, Retired
  Aviation Chief Warrant Officer, U.S. Coast Guard, Retired
        U.S. Coast Guard, Always Ready, Always There
Every hour, Every day, Around the Clock and Around the World
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