Message-ID: <4FEE172B.1050002@virgilio.it>
Date: Fri, 29 Jun 2012 22:59:23 +0200
From: Claudio Girardi <claudio.girardi@virgilio.it>
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To: rsgb_lf_group@blacksheep.org
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 <Stefan.Schaefer@iup.uni-heidelberg.de>
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Subject: Re: LF: Fwd: Help needed, mechanical filters
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Stefan,
if I understood correctly, the datasheet says that the impedance is 18=20
kohm if you use the red and green wires and 500 ohm if you use the=20
yellow and green ones; so you should load both sides with 18 kohm in=20
your case, or change taps.
Then you should also load the filter with the exact capacitance values=20
printed on its ends, connected between the red and green wires.

Regards,
   Claudio

On 06/29/2012 10:26 PM, Stefan Sch=C3=A4fer wrote:
>
> The input signal is connected on the left side between the red and gree=
n
> wire. The output signal is taken from the right side on the red and
> green wire too. It looks as if each side has a coil on the green and re=
d
> wire, with a tap at the yellow wire.
> Helpful was this image from the web
> http://www.amateurfunkmuseum.de/AFM_321b-Dateien/image006.jpg  which
> shows a similar filter. I have connected a resistor of 18 kOhm to the
> output and a 500 Ohm resistor in series to the signal generator, as
> stated in the datasheet. But the ripple does not change.
>
> Any ideas or suggestions?
>
> Guess for what i will need the filter! :-)
>
> 73, Stefan/DK7FC
>