[INRAD] filter comparison

[Milan Pelech]

Sure, 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. It depends only on specific type of TRX and IF mixing 
diagram. If you will replace him for INRAD filter, you will get more better 
results on each radio. Check your TRX schematic diagram and INRAD filter 
proposal. Not exist simpler way how get better RX improvement.

73 de Milan, OK1VWK


----- Original Message ----- 
From: "Anders Janis SM4RNA" <sm4rna at telia.com>
To: "Gary Wiig" <gwiig at lanl.gov>; <list at inrad.net>
Sent: Friday, September 08, 2006 3:23 PM
Subject: Re: [INRAD] filter comparison


> The Inrad crystal filters is better than Collins.
>
> The "bad" selectivity on the IC-718 is du to that Icom uses a simple 
> Murata
> filter for SSB. If I had a IC-718 I would buy a 400Hz Inrad filter and
> install in the empty place. Then I would remove the Murata SSB filter and
> Wire in a 2,4kHz Inrad filter.
>
> de Anders SM4RNA
>
> ----- Original Message ----- 
> From: "Gary Wiig" <gwiig at lanl.gov>
> To: <list at inrad.net>
> Sent: Friday, September 08, 2006 2:56 PM
> Subject: [INRAD] filter comparison
>
>
>>I have been out of the hobby for the last 40 years.  I have an Icom 718
>> that I would like better selectivity on ssb (and also cw, but I can only
>> add one filter), and don't know how to decide between the three
>> bandwidths offered.  Any advice?
>>
>> I've also been told I could add Collins mechanical filters to this
>> radio.  I think I remember them as being the best when I was a kid, but
>> is that accurate and does it still apply today?  How do they compare to
>> INRAD?
>>
>> Thank you.
>>
>> Gary K0FDZ
>>
>>
>>
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>
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