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
>>>
>>>
>
|
