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| To: | [email protected] |
|---|---|
| Subject: | Re: LF: FZ-02-B mechanical filter input matching |
| From: | DK7FC <[email protected]> |
| Date: | Wed, 20 May 2015 15:08:08 +0200 |
| In-reply-to: | <[email protected]> |
| References: | <[email protected]> <[email protected]> |
| Reply-to: | [email protected] |
| Sender: | [email protected] |
| User-agent: | Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3 |
Hi Roelof,My goal is to cut out the spectrum of interest before passing it to the mixer. This meachanical filter is doing the job very well. It has an excellent stop band attenuation, a low pass band ripple, it is cheap, it is available, it doesn't need much fine tuning, it is mechanically stable and compact. I may find a few more arguments when thinking longer :-) 73, Stefan PS: Thanks Rik for the feedback. Am 20.05.2015 11:36, schrieb [email protected]: Hello Stefan, I wonder why you are using a mechanical filter for this purpose. Using a four pole (top coupled) LC filter provides the possibility for matching at both sides of the filter and full coverage of the 630m band. 73, roelof, pa0rdt |
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