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The notch filter

It is shown in Fig.1 the notch filter is reconstructed using C1 from 28 MHz to 60 MHz and can be useful to suppress ТV1.


Fig.Katushka L1 - frameless, contains 10 turns of wire 0.8 mm mandrel diameter 8 mm, length of winding - 18 mm Taps - from 4.5 and 5.5 turns. L2 is also frameless, contains 6 turns of the same wire on the mandrel with a diameter of 12 mm, the winding length of 18 mm.

The filter design is shown in Fig.2.


Fig.2

Literature

  • Television interenference Manual, RSGB, 1979.

  • The ham radio LW and УSW 9/97, p.29

    • Publication: N. Bolshakov, rf.atnn.ru

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