[Boatanchors] How much is too much?

[Bob Macklin]

With tube radios the only real problem you will have is cross modulation. It 
takes a direct connection to damage tube radios.

But solid state is a whole different problem.

Use an antenna switch that disconnects your radios when not in use.

Bob Macklin
K5MYJ
Seattle, Wa.
"Real Radios Glow In The Dark"
----- Original Message ----- 
From: "Jack Antonio" <scr287 at att.net>
To: <boatanchors at mailman.qth.net>
Sent: Saturday, January 29, 2011 3:03 PM
Subject: [Boatanchors] How much is too much?


> Subject is concerning power levels into a receiver, not
> prices on eBay.
>
> I am looking at putting up multiple antennas at my QTH, for
> multiple radio setups, and am wondering if RF into one
> antenna may damage a receiver on another antenna.
>
> As a test, I hung an 80 meter inverted vee, with the centers
>  separated by about 10 feet vertically and 3 feet horizontally
>  from the regular station antenna. (these are eyeball measurements).
>
> 100 watts into antenna A(+50 dbm) results in +34 dbm from
> antenna B, as measured on a spectrum analyzer. Just slightly
> over 2 watts.
>
> This seems like too much for a receiver to safely handle, but what
> is a safe value?
>
> Thanks
>
> Jack Antonio WA7DIA/4
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