CFR455G NB Fm filter

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G8DKC
Posts: 249
Joined: Thu Jun 28, 2012 9:39 am

CFR455G NB Fm filter

Post by G8DKC » Thu May 31, 2018 3:42 pm

I'm looking for a NB Fm filter CFR455G or at a push but maybe too narrow a CFR455H.

Does anyone know of a source, asked a helpful Ebay supplier but nothing found yet...

He told me Most of the Yaesu/Kenwood radios use the "G" on FM narrow.

Peter

G3GJA
Posts: 59
Joined: Sun Nov 20, 2011 3:44 pm

Re: CFR455G NB Fm filter

Post by G3GJA » Mon Jun 04, 2018 8:46 am

I have a few CFU455G spare from a batch that I ordered to convert some ancient Icom radios to NFM. Pin out is different but Zin / Zout and bandwidth is similar but the skirt probably is not as good. In the Icom 211e I used 2 as per the original circuit and the results were good.

As the CFU series is physically smaller than the CRM you would be able to get 2 in and use the method used by Icom to link them which I think was a couple of resistors.

Clive G3GJA / G8EQZ

G8DKC
Posts: 249
Joined: Thu Jun 28, 2012 9:39 am

Re: CFR455G NB Fm filter

Post by G8DKC » Tue Jun 05, 2018 11:31 am

Hi Clive,

Thanks for the reply, have sent you a PM.

Regards

Peter

G8DKC
Posts: 249
Joined: Thu Jun 28, 2012 9:39 am

Re: CFR455G NB Fm filter

Post by G8DKC » Tue Jul 03, 2018 9:28 am

Nothing heard from you Clive, although two of my PM's gone from out box...

Edit 04/07/18... Since original post a source has appeared on EBay, so have placed order.

https://www.ebay.co.uk/itm/5x-MURATA-CF ... SwBahVeVui

Your modification details will be useful.

Peter

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