filtr SFD455A(5pin)

Adam Guest 2011-07-26 08:08 #2280008

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what  can I use for obsolete and hasrd to find filter SFD455A(5-pin) 
exchange in G. Baaars Elektor 10/99 receiver (on TDA1572)(Is it posible 
to use two
3-pin filters?)? Can it be SFZ455A or CFR 455 or CFL 455 ?
 Adam

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HabNix Guest 2011-07-26 17:56 #2280845

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SPECIFICATIONS SFD455B

Ladderfilter fo= 455kHz,
Delta fo = ±2kHz,
3dB bandwidth = ± 4.5kHz,
6dB bandwidth = ± 6 KHz,
Input/Output Imp. = 3kOhm/10pF,
Insertion Loss min. 5dB- max. 9db,
Selectivity ± 9kHz = 18-24dB.

Attached files:

El2-2001.JPG (50 KB)

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Adam Guest 2011-07-26 20:08 #2281010

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thanks my intrest concern sw receiver not am one.Is SFD455B 5pin type?
                                         Adam

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HabNix Guest 2011-07-27 15:52 #2282049

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Yes

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Wolfgang Horn Guest 2011-07-30 00:30 #2285543

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Hi, Adam,

have a look here: 
http://cgi.ebay.de/ws/eBayISAPI.dll?ViewItem&item=260826267940&ssPageName=STRK:MESELX:IT

Ciao
Wolfgang Horn

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