[UK-CONTEST] connectors

[Steve Thompson]

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