[Milsurplus] OT: Coaxial Relay ratings

[Peter Gottlieb]

Breakdown goes down as frequency increases, but perhaps not enough for this 
application with those relays.

Here is one rated at 325 Watts at 2-3 GHz: 
http://www.pasternack.com/images/ProductPDF/PE7147.pdf
They give a rating of 550 Watts from DC to 1 GHz.  I would imagine the de-rating 
would be different depending on manufacturer and design.

Also note SSB can have higher peaks and if there is a mismatch the voltages 
could be a lot higher.  If you're switching the output of an antenna tuner you 
would need something entirely different.

Peter



On 10/16/2014 11:12 PM, W2HX wrote:
> Hello all,
>
> I am looking to switch full legal limit coax feed to 3 antennas remotely. I am looking at some surplus coax relays to do this. One that I am looking at uses "N" connectors and the spec sheet says it is rated for "300W cw @ 3000 MHz & Sea Level).  Well, I am not too far from near sea level, but my question is, can anyone hazard a guess about how the power rating might change from 3 GHz to 30 MHz? I know that UHF/PL-259 are better connectors for higher power than "N." There is no information on power rating vs frequency on the data sheet (this is a Transco product).
>
> thanks
>
> 73 Eugene W2HX
>
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