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Pass Band Filter - RF Cafe Forums

The original RF Cafe Forums were shut down in late 2012 due to maintenance issues. Original posts:

Amateur Radio | Antennas | Circuits & Components | Systems | Test & Measurement


amimar
Post subject: pass band filter
Unread postPosted: Thu Apr 21, 2005 2:58 pm

Hi
I m looking fr a passband filter for thr marine band 156-162 MHz can someone help me please to find SMT component
Thanks


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Guest
Post subject:
Unread postPosted: Thu Apr 21, 2005 5:09 pm

Go to the following website: http://tonnesoftware.com/. There is a program called ELSIE, that you can use to design the filter you are looking for.


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Guest
Post subject:
Unread postPosted: Thu Apr 21, 2005 5:21 pm

Anonymous wrote:
Go to the following website: http://tonnesoftware.com/. There is a program called ELSIE, that you can use to design the filter you are looking for.


i need a componen i can by and inert into my design


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Guest
Post subject:
Unread postPosted: Fri Apr 22, 2005 8:27 am

Try the filter companies, but be ready to pay some big money since it will be a custom design. You be better off designing it yourself, it would only comprise of 5 surface mount parts at best.


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Guest
Post subject:
Unread postPosted: Fri Apr 22, 2005 11:57 am

Anonymous wrote:
Try the filter companies, but be ready to pay some big money since it will be a custom design. You be better off designing it yourself, it would only comprise of 5 surface mount parts at best.

i need to know if there is a componenets that make that i don t want to make a custom design


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Qacer
Post subject: Re: pass band filter
Unread postPosted: Tue Apr 26, 2005 9:37 pm
Offline
Captain

Joined: Sat Apr 23, 2005 2:09 pm
Posts: 17
Location: Tampa, FL
amimar wrote:
Hi
I m looking fr a passband filter for thr marine band 156-162 MHz can someone help me please to find SMT component
Thanks


You can always use DSPs. Have you actually tried searching on Digikey for such a part? If it's not there, you can always use Google. I found this filters site through it http://www.ana-tech.com/.


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Qacer
Post subject:
Unread postPosted: Tue Apr 26, 2005 9:40 pm
Offline
Captain

Joined: Sat Apr 23, 2005 2:09 pm
Posts: 17
Location: Tampa, FL
I take that DSP quote back. I don't know much about it, but I remember my friend telling me that the frequency that you can sample is only as good as the processor speed. I don't think they have fast enough DSPs that can sample a 100 MHz signal. Anyone can shed a light on this? Remember, I'm clueless with DSPs.


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RF Burns
Post subject:
Unread postPosted: Wed Apr 27, 2005 2:46 pm

Hi Amimar,
A bandpass filter at this frequency should be relatively simple to design. Once you have designed it and calculated the L and C values you need you should check the coil craft website for the inductors www.coilcraft.com. For the capacitors, try AVX (www.avx.com). Coil craft will probably supply you with a small quantity of free inductors. Upon finding the appropriate cap from AVX you may order it online from Radio Spares (rswww.com) etc. These components are reatily available.

Good luck



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