Five 100 watt transmitters combined is 2500 watts PEP that you have to worry
about at the antenna port.
73
Gary K4FMX
> -----Original Message-----
> From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com]
> On Behalf Of Sam Carpenter
> Sent: Tuesday, April 26, 2011 9:25 AM
> To: 'Shane Youhouse'; 'Carl'; 'Roger (sub1)'; amps@contesting.com
> Subject: Re: [Amps] DIN vs N
>
> Almost everything about the argument is frequency dependant. I do a lot
> of
> work at 800 mHz. Often I will combine six or seven 100 watt transmitters
> to
> a single antenna with combiner cavities and circulators. N Connectors
> will
> often fail if all the base stations come up at the same time. When
> working
> at .5 KW and above at 800 mHz or higher, I would not consider N or
> PL259.
>
> There can be some weakness of both PL259 and N at HF. I switched to one
> of
> the 75 meter arrays (involved 807s) once while running war emergency
> power
> on 20 meters and blew a PL259 off the cable and started a small plastic
> fire. The Henry Radio 4k Ultra amp uses a special "high power" N looking
> connector on the back of the amp that is very different and not
> compatible
> with standard. I think the price for a single connector is in the $150
> range.
>
> Things can go very wrong when even a small mistake occurs at high power.
> You
> cannot switch off-line fast enough to avoid these often violent
> failures.
>
> Sam N9FUT
>
>
>
>
> -----Original Message-----
> From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com]
> On
> Behalf Of Shane Youhouse
> Sent: Monday, April 25, 2011 7:25 PM
> To: Carl; Roger (sub1); amps@contesting.com
> Subject: Re: [Amps] DIN vs N
>
> PL 259s I've personally witness run at 2Kw carrier, 10 Kw pep.
>
> N's AND BNC's I've seen about 5-6 kw carrier, 100 percent modulated.
>
> LC I've seen go to about 55Kw, modulated.
>
> I've seen the DIN go in the neighborhood of 140Kw input (linear amp, NOT
> plate mod xmitter). Estimates put the carrier at around 80.
>
> Putting ANY vswr on these connectors REALLY degrade them. ALSO, I've
> found
> MAKE SURE you don't put the connector where it will be in an
> installation
> where current can soar. Believe it or not, the N and BNC are the WORST
> for
> multiband. I've seen more of them meltdown than I have PL connectors on
> multi-band, tuna fed antennas. LOTS more surface area on a PL 259 than
> a N
> or BNC.... Means more current carrying at low freqs and more area for
> skin
> effect at higher freq's. The downside is they are NOT impedance
> constant,
> and the quality REALLY varies on PL \ SO connectors.
>
> Anywho, my unprofessional take on hi power and connections. Feeding
> yagi's
> gets tricky, too.
>
> --Shane
> Kilowatt Delta Six Victor Xray India
>
> -----Original Message-----
> From: Carl <km1h@jeremy.mv.com>
> Sent: Monday, April 25, 2011 03:22 PM
> To: Roger (sub1) <sub1@rogerhalstead.com>; amps@contesting.com
> Subject: Re: [Amps] DIN vs N
>
> Ive run PL-259's at 5:1 VSWR for decades on 75/80 without a problem, no
> need
>
> to run anything else at 6M and below.
>
> Whats an antenna tuner, a different fish species(-;
>
> Carl
> KM1H
>
>
> ----- Original Message -----
> From: "Roger (sub1)" <sub1@rogerhalstead.com>
> To: <amps@contesting.com>
> Sent: Monday, April 25, 2011 6:00 PM
> Subject: Re: [Amps] DIN vs N
>
>
> > On 4/24/2011 8:39 AM, Carl wrote:
> >> ----- Original Message -----
> >> From:<donroden@hiwaay.net>
> >> To:<amps@contesting.com>
> >> Sent: Saturday, April 23, 2011 10:43 PM
> >> Subject: [Amps] DIN vs N
> >>
> >>
> >>> DIN connectors vs Type N .......
> >>>
> >>> Is there a larger cable that mates with the DIN connector ?
> >> They mate with the same hardline and the RG-213 and larger soft
> cables
> >> cables as an N.
> >>
> >>
> >>> What's the advantage / disadvantages of the DIN ?
> >> At HF, zero. An N and RG-213 will handle many times the legal limit.
> The
> >> DIN
> >> is popular with the 20-40KW and up CB crowd and the hams running that
> >> level.
> >
> > Maybe if you don't try to cover all of 75 or 160, but I've blown out N
> > connectors (Amphenols no less) running no more than the legal limit on
> > 75 a number of times. I use a tuner so I can cover all of both bands
> and
> > have not had good luck with N connectors on either of those two bands.
> > On 40 I not only can use N connectors, but RG8X, and CNT240 at the
> legal
> > limit.
> >
> >> At high VHF and UHF the connector is the weak link so a DIN can run
> >> cool in
> >> a 1500W + 432 EME amp running data modes. I run N at 1500W on 2M and
> they
> >> run cool as long as its a quality USA brand. They run decidedly warm
> at
> >> that
> >> level on 222.
> >>
> >> I havent dared run my big 432 amp close to that level yet until all
> the
> >> feed
> >> line and antenna connectors are upgraded.
> >
> > Not a problem here. The legal limit on 440 is 50 watts.<:-((
> >
> > 73
> >
> > Roger (K8RI)
> >
> >> Carl
> >> KM1H
> >>
> >>
> >>
> >>>
> >>> Don W4DNR
> >>>
> >>>
> >>> _______________________________________________
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> >>> Amps@contesting.com
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> >>
> >
> >
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