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QRZ! Ham Radio 1
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QRZ Ham Radio Callsign Database - December 1993.iso
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filtersf.b
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1993-11-21
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76 lines
1978 April QST p. 14
The State-Variable Filter
June QST p. 30
The ABC Active Filter
December QST p. 35
The Club Filter (cw af filter)
1979 January QST p. 42
The CW Filter-Limiter
April QST p. 15
A Simple CW Audio Filter
1980 July QST p. 17
Active Filters
September QST p. 29
What is a Filter?
December QST p. 14
Modern Design of a CW Filter Using 88-
and 44-mH Surplus Inductors
1981 October QST p. 38
Beating Rotten QRM - CW Filtering for
the Beginner
1982 February QST p. 18
Build an Audio Filter with Pizazz 5 pages
April QST p. 33
Concept and Construction of a CW Filter 4 pages
and Enhancer
1983 April QST p. 32
A Dichotic Detector for CW 3 pages
QST p. 35
An Electro-Acoustic CW Filter 4 pages
QST p. 45
Understanding and Using Audio Filters 4 pages
October QST p. 14
A Tunable CW Filter 3 pages
1984 March QST p. 19
Switched Capacitor Filters - An 7 pages
Engineering Technology for Amateur
Radio Use
July QST p. 11
Digital Switched-Capacitor Filters - 5 pages
A Practical Construction Project
1985 April QST p. 23
A High Performance CW Demodulator 5 pages
1986 February QST p. 15
A Simple Effective Receiving Aid 5 pages
(Stereo audio filter)
April QST p. 13
SuperSCAF and Son - a Pair of Swithed- 7 pages
Capacitor Audio Filters
December QST p. 32
Digital Signal Processing - A Modern 8 pages
Audio Filter