[UK-CONTEST] FW: connectors

[regwoolley at aol.com]

Oh I one of those flash over. It had been filled with petrolium jelly. In the end it broke down at 50kw below 30mhz.  It was a right pain getting to it. It was on the  bottom of a 20 ele log periodic. Oh happy days in the Royal Air Force.

Reg 
G8VHI



-----Original Message-----
From: g0nxa at hotmail.co.uk
To: Contest Reflector <uk-contest at contesting.com>
Sent: Sun, 5 Feb 2012 2:45
Subject: [UK-CONTEST] FW:   connectors



From: g0nxa at hotmail.co.uk
To: g8gsq72 at gmail.com
Subject: RE: [UK-CONTEST]  connectors
Date: Sun, 5 Feb 2012 07:44:19 +0000

Come on, won't anyone speak up for the IEA flange?

Giles Herbert
G0NXA

> Date: Sat, 4 Feb 2012 23:10:59 +0000
> From: g8gsq72 at gmail.com
> To: uk-contest at contesting.com
> Subject: [UK-CONTEST]  connectors
> 
> Suhner rate N types as good for 4kW up to 30MHz and 2kW at 150MHz 
> (1:1 VSWR), the curve suggests it's current limited with skin 
> effect. Working voltage is 1kVrms, with the dielectric good for 
> 2.5kVrms. From memory, on hipot they typically arc at 4-5kV.
> 
> I've run them with 20kW pulses at 200MHz, total reflection all 
> phases, without breakdown.
> 
> Steve
> 
> > I have not seen power rating data for N or UHF connectors
> > although I'm sure it's out there somewhere. Professionally, for
> > continuous service, FM band II TX manufacturers stop at 1kW but
> > that's pushing it as the mating surfaces of the N connector are
> > the same as those of BNC and TNC and could fail under either
> > voltage or current under mismatch conditions. UHF connectors
> > are better, but the impedance is not defined so they're not ok
> > above 30MHz really. All my first home brew equipment used
> > Belling Lee (TV) connectors which are even worse! For powers up
> > to 4kW I would look at 7-16 DIN series which although designed
> > for cellular use are properly power rated (even 1kW at 1GHz).
> > Because they are used so widely, the price for standard
> > connectors is reasonable.
> > 
> > On another subject... I'm rarther glad the snow's arrived, now
> > I don't have to go out for AFS tomorrow! Dale - G3XBY
> 
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