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LF: Re: Re: Re: Siemens D2006 Selective Level Meter/Pegelmesser...and W&

To: [email protected]
Subject: LF: Re: Re: Re: Siemens D2006 Selective Level Meter/Pegelmesser...and W&G SPM-3
From: "Tracey Gardner" <[email protected]>
Date: Mon, 4 Nov 2002 14:02:28 -0000
References: <2D280BB697C7EE4C979C5C89925418EF1BF592@TNS-FBU-2E-003.corp.telenor.no>
Reply-to: [email protected]
Sender: <[email protected]>
Hello Jan-Martin

The SPM-3 has a single xtal filter at the 650kHz 1st IF followed by a narrow
LC filter at the 1.5kHz 2nd IF.
The 1.5kHz filter is something like 100/120Hz wide at -6db.

73s Tracey

SPM-3 is another interesting unit, but I believe the selectivity
is based on LC-filters, and it really is too broad. Have kept a few for
possible
interest for 136kc activity in Norway.






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