[INRAD] filter comparison

[Anders Janis SM4RNA]

If you mean the Murata, you could buy the one that I removed from a IC-746 
and put in a INRAD 2,4 kHz in instead, but it seems that I did not bother to 
keep it. It seems like I put it just  just where it belongs. In the garbage 
bin.

If one wants a wider filter one can get a INRAD 2,8kHz filter. There is no 
sense in getting a narower filter with bad shape factor.

For better filters in AM and FM I recomend Kiwa filters that is 
pin-compatible filters that really have the bandwith that is promised. See 
http://www.kiwa.com/index.html

I measured several Murata 6kHz and 8kHz filter and found them to be much 
wider than promised. A 6kHz Murata filter was about 8,2kHz at -6dB. Te Kiwa 
filters was not any steeper, but they complied with the advertised -6dB 
bandwith.

The Murata filters for SSB is just a joke.

de Anders SM4RNA



----- Original Message ----- 
From: "Saandy" <alexeban at bezeqint.net>
To: "'Bill Tippett'" <btippett at alum.mit.edu>; <list at inrad.net>
Sent: Friday, September 08, 2006 5:52 PM
Subject: Re: [INRAD] filter comparison


> ...sadly, these are no longer made!
> Alex 4Z5KS
>
> -----Original Message-----
> From: list-bounces at inrad.net [mailto:list-bounces at inrad.net] On Behalf Of
> Bill Tippett
> Sent: Friday, September 08, 2006 4:36 PM
> To: list at inrad.net
> Subject: [INRAD] filter comparison
>
>
>
> OK1VWK:
>
> >Murata CFJ455K (K5 and next versions) 11-pole ceramic filter is
> usualy used in 2nd or 3rd IF stage across of all amateur radio
> manufacturers.
>
>         I believe Milan meant to say 2-pole not 11-pole.
>
>                                         73,  Bill  W4ZV
>
>
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