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CFR455G NB Fm filter
Posted: Thu May 31, 2018 3:42 pm
by G8DKC
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
Re: CFR455G NB Fm filter
Posted: Mon Jun 04, 2018 8:46 am
by G3GJA
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
Re: CFR455G NB Fm filter
Posted: Tue Jun 05, 2018 11:31 am
by G8DKC
Hi Clive,
Thanks for the reply, have sent you a PM.
Regards
Peter
Re: CFR455G NB Fm filter
Posted: Tue Jul 03, 2018 9:28 am
by G8DKC
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