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PA3AKK > TECHNI 24.01.05 13:33l 35 Lines 1149 Bytes #999 (0) @ WW
BID : 38088_PI8CDR
Read: DL7NDF GUEST OE7FMI
Subj: Re: QRMSTOP.ZIP info
Path: DB0FHN<DB0FOR<DB0SIF<DB0EA<DB0RES<ON0AR<PI8WFL<PI8CDR
Sent: 050124/1229Z @:PI8CDR.#DRE.NLD.EU #:38088 [Beilen] $:38088_PI8CDR
From: PA3AKK@PI8CDR.#DRE.NLD.EU
To : TECHNI@WW
Hello Andy,
I wonder if manufacturers of receivers and transceivers did build in such a
circuit with extra antennaconnector in their equipment. Advantage is that in
transceivers the relais of the circuit is not needed because it is only part
of the receiving section.
But the circuit is develloped around 1990 so it is to be expected that
curcuitdiagrams with other components did replace this.
>You need to have a "noise" antenna.
>
>The best noise antenna is an antenna which receives the interfering signal
>the strongest!
And the wanted signal as less as possible. A good place seems to me as much
downstairs as possible and close to the electricitynetwork of the building
because the electricitynetwork is very noisy with all that equipment connected
to it.
>It is TOTALLY possible to eliminate an S9+60DB signal and listen to an
>S4 signal with complete ease.
How much is the antennuation of the wanted signal ? Should be less of course
as the antennuation of the noise.
And of course a good signal to noise ratio is more important than a high
value of the signalstrength.
73, Wim
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