Back on the topic of connectors, does any one know where on the web I can
find a data chart that reflects power handling characteristics of a LC
connector? I want to know how much difference is there in power handing
capabilities between a 7/16 DIN and a LC type.
KRS
----- Original Message -----
From: Maurizio Panicara <i4jmy@iol.it>
To: measures <2@vc.net>; Steve <ve3tu@rac.ca>; k6uj <k6uj@pacbell.net>; AMPS
<amps@contesting.com>
Sent: Tuesday, November 21, 2000 1:39 PM
Subject: Re: [AMPS] Hi Power Connectors
>
> I believe it.
> For a few minutes, I've done tests with N up to 6 Kw @ 100 MHz (continuous
> carrier) with no failures or damages.
> This is possible with properly installed N connectors althought I wouldn't
> anyway raccomend to use more than 800 W @ 100 MHz with this type of
> connector.
> Up to 30 MHz there is instad a wide margin when using an N at 1500W.
> Connection pin size is not all that matters since allowable RF current is
> different than a mere DC rating.
> PL259/SO239 is a bit awful under this perspective and one shouldn't be
> misleaded by its size assuming the manageable power is larger than that of
> N, at least above 30 MHz .
> Also isolation is a bit meaningless parameter because 1500W @ 50 Ohms are
> only 275V.
> What counts, under reasonable limits, are impedance, materials, small
size,
> mechanical precision etc. and this is valid in all RF connectors, EIA
flange
> included (good inners made with berilium make a big difference compared
with
> lower quality ones)
> For the same reason large vaacum relays for RF are rated for much smaller
> currents at higher frequencies.
> A 30A DC can easily drop to less than 10 A @ 30 MHz and some other non
> vacuum switch, looking smaller but impedance constant and mechanically
> precise, allows much more power already at 30 MHz and expecially above.
> By the way, 1500W represent only 5.5 A @ 50 Ohm and both PL259 and N can
> perfectly withstand it below 30 Mhz.
> Power apart, N has other mechanical advantages that insure a much bigger
> long term reliability than PL does.
> Good cables and good connectors shouldn't be a matter to spare money but a
> desiderable form of good investment.
> World instead goes different and some mental habits are unchangeable in
> front of anything.
> Supported by the tradition to spend money in more visble devices (i.e.
> expensive aluminium with lossy traps, weak but tall towers, or rigs with
> miriads of leds and knobs), cheap cables and cheap connectors have always
> been a good business for traders and also a nice source of poorer results
> and failures.
>
> 73,
> Mauri I4JMY
>
>
>
> ----- Original Message -----
> From: "measures" <2@vc.net>
> To: "Steve" <ve3tu@rac.ca>; "Maurizio Panicara" <i4jmy@iol.it>
> Cc: "k6uj" <k6uj@pacbell.net>; "AMPS" <amps@contesting.com>
> Sent: Tuesday, November 21, 2000 8:49 PM
> Subject: Re: [AMPS] Hi Power Connectors
>
> > >
> > I have put 7kW PEP through a BNC on 160m.
> >
> > cheers, Steve
> >
> > - Rich..., 805.386.3734, www.vcnet.com/measures.
> > end
> >
>
>
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