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Forum: Analog Circuits filtr SFD455A(5pin)


filtr SFD455A(5pin)
von Adam (Guest)

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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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Re: filtr SFD455A(5pin)
von HabNix (Guest)

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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.

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Re: filtr SFD455A(5pin)
von Adam (Guest)

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

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Re: filtr SFD455A(5pin)
von HabNix (Guest)

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Yes

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Re: filtr SFD455A(5pin)
von Wolfgang Horn (Guest)

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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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