The list with a lot of 455 kHz filter measuring results in PDF's.

Most of them are used somewhere in the NRD-515 or in some of my designs.



First a number of (former) manufacturers logos and links (if active):

Murata Manufacturing Co., Ltd. -  http://www.murata.com/products/comm_filter/pickup/index.html#if NIHON DEMPA KOGYO CO., LTD. - http://www.ndk.com/en/products/search/filter/index.html TOKO Inc. - http://www.toko.co.jp/top/en/index.html INRAD - International Radio http://www.inrad.net/home.php Rockwell Collins - http://www.rockwellcollins.com/Capabilities_and_Markets/More/Precision_Manufacturing/Rockwell_Collins_Filters.aspx  Hitachi Kokusai Electric Token Electronics Industry Co., Ltd. -  http://www.token.com.tw/filter/index.html
Euroquartz Ltd. -  http://www.euroquartz.co.uk/filters.aspx EPCOS - A Member of TDK-EPC Corporation  http://www.epcos.com/ OPT Hellas SA,  Greece  -  http://www.opthellas.com Kenwood U.S.A. Corporation - http://www.kenwoodusa.com/Communications/Amateur_Radio/  Yaesu USA   -  http://www.yaesu.com/   PiPhen Electronics Limited -   http://piphen.manufacturer.globalsources.com/si/6008829330029/Showroom/3000000157487/16701/Ceramic-filter.htm  Zhejiang Zhengyuan Electric Co., Ltd.  -  http://zzecl.en.china.cn/selling-leads/detail,1066726004,Piezoelectric-Ceramic-Filters.html
455if Innertron  -  http://www.innertron.com/ AEL Crystals LTD  -  http://www.aelcrystals.co.uk/  Icom America  -  http://www.icomamerica.com/ Oscilent Corporation  -  http://www.oscilent.com/  AVX is a group company of KYOCERA   -   www.avx.com/ Zhejiang Jiakang Electronics Co. Ltd  - http://www.jkelec.com/products_detail1/&productId=887d2ba8-d56a-4df0-bfd0-377e4d2bcbba&comp_stats=comp-FrontProducts_list01-1339131884296.html


PDF clicker Some information and description of universal standard materials
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INRAD-COLLINS number #720
This is a test of a replacement SSB filter from INRAD - Collins for (a.o.) the Yaesu Rx-Tx FT897D.
Here I am shocked about, this is almost a pornographic picture with the most ideal design shape.
Very flat top, very good shape-form, very good stopband suppression!! Jeez, is this possible now nowadays?
Costs as much as the most expensive ceramic filter types which canNOT match/compete with it!
Measured in the open construction version-3, the real bottom can be 5 to 10 dB lower.

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CFU455I, CFU455IT, a NBFM and a scrap filter. Compare this with the previous (INRAD).
These are the cheapest 3-legs standard filters, used in consumer radio's.
Also a wide 15 kHz NBFM version in this set.
Not the yellow blocks with several glued together, that's even worse ...
Still complete shit, I had to pay for it? I don't want them now even for free ....
A complete joke... Stopband suppression?? What's that??

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V2

After building the V2 update (4th version of the measuring module, with much stronger internal shielding) and a 20dB higher level, measuring a control measurement with low dB depth of a simple 3-leg filter, CFU455I.
Does it look exactly like the CFU455I from above? Yes, it does, so that's OK.

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Here the most simple SFT455B types - the multi element yellow blocks with several glued together
For a bit laugh....
Note the frequency scale in the graphs


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CFM455H
This filter is a fairly broad style AM filter, for Class AM sound, but not really ideal for DX.

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SFR455H
the yellow CFW / CFR compatible cubes from Kent Electronics (NL) and the same (but more expensive) also availabe at Barend Hendriksen (NL).
Not to expensive overall for simple applications with 6 to 7 kHz width, good stopband suppression.
MUCH and much better than the yellow blocks with several glued together.
Not very narrow, but still quite good for the low price.
Two selected ones in series is similar to a filter of around 50 euros or more! See for yourself in the PDF.

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Compare test TOKO_A55H - CFR455I - CFW455HT types

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Compare and duo test many versions CFW455IT from Murata

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Compare and duo test many versions CFW455IT from Murata, an extended version of the previous one.
So many curves that they could make you dizzy!

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test (2x) of the narrow Murata type CFW455KI

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A collection of tests: CFW455IT single and as duo (cascaded)
As duo for a small price a filterclass which is at least 5x more expensive!

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KENWOOD YG-455C-1 en YG-455CN-1, 500 and 250Hz real CW crystal blocks from the NDK factory

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KOKUSAI SSB filter MF-455-11GZ made for ICOM. Original.
This is the standard measurement with the V1 module, an early measurement with relatively open structure between IN and OUT (but well covered!), So a "decent" HF leak around the filter.
And yet it measures still fine in comparison with the ceramic Murata's.

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V2

KOKUSAI SSB filter MF-455-11GZ made for ICOM. Same as above. No sticky foam, but silicone elastomer, see picture. Filter just had a bath and still naked?? © by PE1ABR

This is the measurement with the V2 upgrade module with more internal shielding. This still 20 dB deeper measure, and the filter floor goes down with it!
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V2

Narrow Murata quality filter test with 2x the CFW455IT in cascade, tested in module V2.
No ripple compensation is required. There is no standard quality AM "6 kHz" filter to compete with.
Compare this with what is standard in the NRD-515: same bandwidth (just above 6 kHz), significantly better shape factor, at least 40 dB better stopband suppression and a bit more damping, ie 1.5 dB more.
Ideal for an additional roofing filter in front of the first 455 kHz stage (in position C170).

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V2

One more time a test with module V2 with 2 filters in cascade from the type SFR455H, compatible with CFW455H. These yellow cubes come from KENT Electronics.
You get easily the -100 dB floor without even a single pendulum in parasitic suppression area.
Unfortunately, the passage had a small ripple. Which tricks are needed to reduce or to minimize the increased ripple?
Tests with an increased terminate-Z of 2K7 instead of 2K0 = best option. Possibly an extra T-terminator in between of a few dB = reasonably OK (also done by INRAD / Collins!). Nothing extra in between is also usable.
Also tested with a single intermediate 2K0-R or -C of 180pF (= 2K0 ) or a series Z-C of 180 pF (= also 2K!) The latter gives just extreme wrinkles.

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PDF has info
in Dutch

filter: PYE 455 kHz dump LC-filter.
type No. : 7V455L and AT10752/2, internal AT26804 is used.

Turns out to be a 7-pole potcore LC IF-filter for narrowband FM application, width 15 to 17 kHz.
In the PDF testinfo: XLS measurement data, curves and a circuit diagram.

Hermetically sealed, no after-alignment is possible. Coils are only accessible by a hacksaw or gas burner = both destructive!
5x low impedance links with 600 pF C between "foot"-taps and 1x top link with 13 pF.
7x parallel C of also 600 pF. Purchased from KENT Electronics in Hoek, Netherlands.
Tested with a (guessed) IN / OUT-Z of 600 ohms.

Tested three randomly selected copies, their 60/6 shape between 2.5 and more than 3, depending on the tuning.




PDF clicker Very special tests with material for/from/or used in the JRC NRD-515
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A NRD-515 filter plugin-board (PETER) with: YF455DPB and KOKUSAI, update version after second foam change

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A NRD-515 filter plugin-board (PETER) with: YF455DPB and KOKUSAI, earlier version

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A NRD-515 filter plugin-board (PETER) with: YF455EBF and KOKUSAI

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A NRD-515 filter plugin-board (WALTER) with: Kenwood YG-455CN-1 (250 Hz) and KOKUSAI, 2nd modified cleaning with other type of foam

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KOKUSAI - 3x_separate versions - from the filter plugin-board from the flash NRD-515

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A filter plugin-board from the flash NRD-515 (WG) with: NDK-YF455DPB en KOKUSAI

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After temporarily removing a few switch D's on the motherboard:
the NRD-515 filters CLF-D6S (6 kHz AM) and MF-455-10AZ121 (2,2 kHz SSB), from the flash NRD-515 (WG)

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After temporarily removing a few switch D's on the motherboard:
the NRD-515 filters CLF-D6S (6 kHz AM) and MF-455-10AZ121 (2,2 kHz SSB), standard NRD-515 (WG)




PDF clicker For those who want older ceramic filter datasheets which are less easy to find
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Page 55 en 56 from the CERAFIL_Murata_communication__P05E from 1993

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An optimised scan of my own, from the P05E-5 CERAFIL guide from Murata from 1994, only scanned filters with "lugs/pins".
NO SMD added, it was labor enough already ....
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The extract from a Murata collection book, can also be found in the CERAFIL_Murata_communication__P05E-8
A lot of badly scanned sheets are available on the web from this booklet, my sheets are perfect.
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An old, but complet version CERAFIL_Murata_communication__P05E-9
The old types used by radio amateurs are almost all missing....
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An old one from Kyocera-AVX with KBF-455-RS and KBF-455-PS info

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An old one in color from Kyocera-AVX with KBF-455-RL and KBF-455-PL info

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An older version from Kyocera-AVX with KBF-455-RL and KBF-455-PL info

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An PDF set from TOKO-RCL, the LFYM455 and LFY455

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And a PDF set from AEL LTU455
AEL filters probably made by Zhejiang Jiakang Electronics Co., Ltd., see their logo on the latest versions.




Walter Geeraert

PE1ABR


 
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The IF-filter table list
Compilation by Walter - PE1ABR - 2014-01-18