[NLRS] SMA power handling

[Dr. Gerald N. Johnson]

There are SMA made for LMR295 (8X) and LMR400 coaxes. I wonder about the 
impedance match through the transition of diameters and worry more about 
the stiffness and weight of LMR400 breaking the SMA connector.

I don't see how the connector can take more power than the coax, unless 
the coax is made of nichrome and teflon to handle operating while 
glowing. For sure polyethylene is less capable of handling center 
conductor heat than teflon.

Sealectro says center conductor is limited to 2 amps, that's 200 watts 
max at any frequency.

73, Jerry, K0CQ

On 2/15/2013 11:12 AM, John (JK) Kalenowsky, K9JK wrote:
>
>
> Jon,
>
> The concern is your assumption (though that exists with ANY connector).
>
> Did you try Googling "sma connector power handling"? (
> https://www.google.com/search?q=sma+connector+power+handling )
>
> One company's page I found from that search (
> http://www.svmicrowave.com/index.cfm?fuseaction=productoverview.one&content_id=90&;
>
> ) stated 1.2 kW Peak but a later table on that same page stated the following
> for "average" power ratings (by Frequency):
>
> 100 MHz - 550 W
> 500 MHz - 225 W
> 1 GHz - 170 W
> 5 GHz - 60 W
>
> Many MORE web sites showed up in the search. Your mileage (or power ratings that
> you experience) may vary.
>
> Jerry, K0CQ's observation about cable power handling should be considered, too.
>
> 73, JK
>
>
> ________________________________
> From: "w0zq at aol.com"<w0zq at aol.com>
> To: nlrs at mailman.qth.net
> Sent: Fri, February 15, 2013 8:58:11 AM
> Subject: [NLRS] SMA power handling
>
>
>
>
> Assumming a good match, how much power can a SMA connector handle at 2m, anyone
> know?
>
> 73, Jon
> W0ZQ
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