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Re: LF: MF tonite

To: [email protected]
Subject: Re: LF: MF tonite
From: "C. Groeger" <[email protected]>
Date: Thu, 13 Sep 2012 14:20:45 +0200
Reply-to: [email protected]
Sender: [email protected]
Stefan,
What about today 17.30 UTC?

73, df5qg

Christian Groeger

Stefan Schäfer <[email protected]> schrieb:

>Christian,
>
>Are you QRV tonite? I would like to see or better hear the difference of 
>my RX performance when using my band filter i was testing in the afternoon.
>
>It is the mechanical filter which uses source followers at the input and 
>output, to provide a constant accurate impedance matching to keep the 
>passband ripple as low as possible. The afternoons tests have been very 
>promising, see https://dl.dropbox.com/u/19882028/MF/MF%20Filter.png
>This is the frequency response: 
>https://dl.dropbox.com/u/19882028/MF/473%20kHz%20ZF%20Filter%2040%20dB.png
>
>There should be a much better image rejection now and so maybe a few 
>more dB SNR... Unfortunately the filter does not cover the 502 kHz 
>region. But this problem will be gone in some months...
>
>Will be on 472.5 kHz soon.
>
>73, Stefan/DK7FC
>
>Am 12.09.2012 21:01, schrieb C. Groeger:
>> Thanks, mal for these wise words!
>> Df5qg (Homebrew&  CW)
>>
>> Christian Groeger
>>
>> mal hamilton<[email protected]>  schrieb:
>>
>>    
>>> Never replace the MORSE KEY, you do at your peril !!
>>> Other modes come and go but MORSE lives on
>>> All Radio Operators know this.
>>>
>>> G3KEV
>>>
>>>      
>
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