If your neighbor was watching cartoons with no kids around, I'd say that
tells you all that you need to know about him, Hi.  For those who aren't
familiar with the term hardline, it comes in various sizes, and it is very
stiff.  Not as stiff as rigid copper water pipe, but not much less.
Hardline is also called Heliax by some people, and of course hardline
requires special connectors made specifically for that brand and size.  The
largest manufacturer of hardline is probably Andrew.  Hardline is essential
for high power, and frequencies above say 800 MHz.  In my case, I use 7/8
Andrew hardline from my shack out to my tower, then switch to LMR600DB for
the vertical run up to the top of the tower.  In order to permit the antenna
to turn with the rotor, I switch again, but this time to LMR600UF.  The DB
suffix on LMR series coax stands for direct bury, and the suffix UF for LMR
series coax stands for ultraflex.  I use LMR900DB for my six meter run to
the tower, and then LMR600DB and LMR600UF up the tower and to the yagi.  The
only reason that I used LMR900DB instead of 7/8 hardline, is because I had a
bunch of it that I bought at a steep discount from a ham that got it at his
place of employment.  He also sold me the connectors for it at a steep
discount as well.  A 7/16 DIN connector for LMR900D costs over $100 each.  I
believe that my friend charged me $30 each for the ones he got at work.  He
wasn't overly specific about how he got the cable and connectors, and I
didn't push him, Hi.

BTW, Cable labeled with the 3 letters LMR is made by Times Microwave.  One
of the nice features of LMR coax is that the shield is made of foil, not
woven out of tiny wire like RG8, RG213, RG58, and the like.  Because the
shield does not have holes in it, it is less lossy, and less susceptible to
intermod and cross talk.  Another thing is that connectors are affixed to
the end of the cable by either crimp or compression.  You don't solder the
connectors onto it.  The crimp connectors are attached by a round sleeve or
bushing, that is squeezed into a hexagonal shape with a crimping tool made
for that size Times Micro cable.  The compression type of connector is
tightened to the cable by tightening the back end of the connector with two
wrenches.  The compression style can be reused, but the crimp type can only
be used once.  7/16 DIN connectors are about 4 or 5 times as big as type N
connectors.  These connectors are good way up to perhaps 5 or 6 HGz, and can
handle maybe 30 KW or more.

If I am boring you to death, sorry!, Hi.  However, if anyone has any
questions, just ask.  There will be a quiz at the end of the semester.



Alan R. Downing
Phoenix, AZ


-----Original Message-----
From: For blind ham radio operators [mailto:[log in to unmask]]
On Behalf Of Phil Scovell
Sent: Saturday, August 24, 2013 2:02 PM
To: [log in to unmask]
Subject: Re: Feedline for 12K

Thanks Alan.  I figured it would be something of that nature.  I also 
figured a PL259 wasn't going to take too much power.  I personally don't 
think the U S, just like other countries, should have 1500 for a limit.  If 
a guy has a clean signal and is 60 over nine, I just move a little further 
away from him, haha.  I think 3 to 5 KW would be a better standard.  The 
bands are bigger now and most radios have band width settings so unless they

are just plain stupid, no hams like that of course, they aren't going to run

very wide with those higher power settings.  I never had an amp that would 
run more than 1200 out and until I got that amp, I ran 700 for 10 years 
without any RFI or TVI complaints from neighbors.  As soon as I got my SB220

running, I had a neighbor who came from two doors down and complained I was 
getting into his TV.  I had a 2 element 40 meter beam at 70 then, too.  I 
asked him what time of the day.  He said 10:30 in the morning.  I never 
operated at that time and told him so.  He claimed he could understand me so

that's how he knew it was me.  I explained to him about side band and CW 
and the way they sounded but he never understood, nor was he ever employed, 
but he was either drunk, or high, most of the time, so I just gave him a 
copy of the FCC booklet the told non hams how to solve interference problems

and he never bothered me again.  Oh, by the way.  I asked him what he was 
watching and what channel because I was going to see if that program was on 
at that time once he left my front door.  He was watching a cartoon channel.

I discovered his favorite cartoon was not on at 10:30 as well because he 
admitted he loved watching a certain cartoon on TV when his kids were in 
school.

Phil.
K0NX



----- Original Message ----- 
From: "Alan R. Downing" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Saturday, August 24, 2013 2:25 PM
Subject: Re: Feedline for 12K


> For the long runs, from the shack out to the base of the tower say, for HF

> I
> would use either half inch Andrew hardline, or something like LMR600 or
> LMR900.  For jumpers, like for the rotor loops at the top of the tower, I
> would use LMR600UF*ultraflex).  Generally connectors for that kind of 
> power
> are called 7/16 DIN connectors.  No one uses UHF(PL259) connectors for 
> more
> than perhaps 3KW.  Some guys use type N connectors for power, but type N
> connectors make me nervous at high power levels because the center pin is
> very small, much smaller even the center pin on PL259's.  UHF(PL259)
> connectors are very poor because they aren't sealed against the weather, 
> and
> they don't maintain a 50 ohm impedance across the connector.
>
> HTH
>
> 73
> .
>
>
> Alan R. Downing
> Phoenix, AZ
>
>
> -----Original Message-----
> From: For blind ham radio operators [mailto:[log in to unmask]]
> On Behalf Of Phil Scovell
> Sent: Saturday, August 24, 2013 1:24 PM
> To: [log in to unmask]
> Subject: Feedline for 12K
>
> Alan, or anybody else who might know,
> What's 12K need for feedline?  I suppose there are connecters that convert
> down to PL259?
>
> Phil.
> K0NX
> ----- Original Message ----- 
> From: "Alan R. Downing" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Saturday, August 24, 2013 1:46 PM
> Subject: Re: Out of the loop to long?
>
>
>> Some countries have no output limit, and the maximum output of an amp
>> doesn't make them illegal, even here in the States.  You can legally own
>> an
>> amp that has 100KW output as long as you don't exceed 1500W when 
>> operating
>> it.  Having said that, an awful lot of US hams run ten KW and up every 
>> day
>> of the week.  There is an amp builder here in the States who builds amps
>> using the 4CX15,000A tube which has an AB1 limit of 28KW.  The manual 
>> tune
>> version costs $24000, and the auto-tune model costs $32000.  They are 
>> both
>> legal to own, but you can't legally exceed 1500W output.  Unfortunately,
>> in
>> order to run more than about 10KW, you must have 3 phase service with a
>> line
>> voltage of 480V.  Many overseas countries use 3 phase 415V, and many of
>> the
>> very high-power amps are built for that service.
>>
>>
>>
>>
>> Alan R. Downing
>> Phoenix, AZ
>>
>>
>> -----Original Message-----
>> From: For blind ham radio operators 
>> [mailto:[log in to unmask]]
>> On Behalf Of Michael Ryan
>> Sent: Saturday, August 24, 2013 12:24 PM
>> To: [log in to unmask]
>> Subject: Out of the loop to long?
>>
>> Hi all: =20
>>
>> 3 to 12kw? Isn't the legal limit for the amateur radio service 1500w
>> continu=
>> ous? Where did the 12kw get to be common place? Lol =20
>> I'm these amps must be 20000. That's just ridiculous.=20
>>
>> Michael DE VO1AX=20
>>
>>
>> Sent from my iPhone=
>>
>