[CQ-Contest] Food for thought re wide signals

Bill Coleman aa4lr at arrl.net
Tue Oct 31 18:14:43 EST 2000

On 10/31/00 16:41, Richard Gelber at RGelber at compuserve.com wrote:

>If your transceiver produces 3rd order products 35 db down, then even if
>your amplifier adds NO distortion of its own (not likely), but only
>amplifies every thing fed into it by the same factor, then your third order
>products on the air will be 35 db down from 1500 watts, or half a watt.  A
>half a watt of RF fed into a high stack is still pretty loud on the other

Another possibility is that the transmitter in question may be perfectly 
clean, but the distortion products are generated in the observers 
receiver, due to the exceptionally strong signals.

The quick test for this is to activate about 20 dB of receiver 
attenuation. If the distortion clears up, it is obviously a receiver 

Bill Coleman, AA4LR, PP-ASEL        Mail: aa4lr at arrl.net
Quote: "Not within a thousand years will man ever fly!"
            -- Wilbur Wright, 1901

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