24, 50, 100, 400, 500 kHz Low Pass Filters

500 kHz Low Pass Filter

This high performance low-pass filter is designed for the "Lowfer" enthusiast to reduce interference from MW broadcast signals (and higher frequencies). The 500 kHz LPF is inserted between the antenna and receiver. Any signal above 530 kHz is heavily attenuated. Signals below 500 kHz pass with virtually no attenuation. There are several destinguished characteristics to the Kiwa 500 kHz Low Pass Filter that provide a level of performance apart from other designs. These are:

The design is completely passive to eliminate any possibility of noise or distortion being introduced to the receiver.
The design uses high Q torroidal inductors to provide an extremely sharp filter response.
High Ultimate Rejection
The filter is housed in an rf tight/shielded cast aluminum enclosure.

Specifications

Input/Output Impedance: 50 ohms

Passband Insertion Loss DC to 440 kHz: 0.5 dB

Corner Frequency (-3 dB point): 490 - 500 kHz

-60 dB attenuation point: 750 kHz

Ultimate Rejection: >70 dB from 850 kHz and above

Dimensions: 5.5 in(14 cm) x 2.5 in(6 cm) x 2.25 in(6.7 cm)

Connectors: SO-239 (standard), N, BNC

Filter Response

Frequency     Atteunuation

100 Hz        -0.5 dB

10 kHz        -0.5 dB

100 kHz       -0.5 dB

200 kHz       -0.5 dB

300 kHz       -0.5 dB

400 kHz       -0.5 dB

450 kHz       -1.0 dB

500 kHz       -3.0 dB

530 kHz       -8.0 dB

550 kHz      -12.5 dB

600 kHz        -22 dB

700 kHz        -41 dB

800 kHz        -73 dB

900 kHz        -79 dB

1000 kHz       -83 dB

1300 kHz       -81 dB

1500 kHz       -78 dB

1700 kHz       -78 dB

Above 1700 kHz -70 dB

Price $88.00

Shipping and Handling in North America $10.00

Shipping and Handling outside North America $18.00

400 kHz Low Pass Filter

The 400 kHz LPF is similar to the 500 kHz LPF but with a corner frequency (-3 dB point) of 390 kHz.

Specifications

Input/Output Impedance: 50 ohms

Passband Insertion Loss DC to 350 kHz: 0.5 dB

Corner Frequency (-3 dB point): 390 kHz

-60 dB attenuation point: 560 kHz

Ultimate Rejection: >70 dB from 590 kHz and above

Dimensions: 5.5 in(14 cm) x 2.5 in(6cm) x 2.25 in(6.7cm)

Connectors: SO-239 (standard). N, BNC

Filter Response

Frequency      Attenuation

100 Hz         -0.5 dB

100 kHz        -0.5 dB

200 kHz        -0.5 dB

350 kHz        -0.5 dB

390 kHz        -3.0 dB

400 kHz        -5.5 dB

420 kHz        -13 dB

440 kHz        -18 dB

460 kHz        -23.5 dB

500 kHz        -30 dB

520 kHz        -33 dB

540 kHz        -42 dB

560 kHz        -58 dB

580 kHz        -72 dB

600 kHz        -75 dB

640 kHz        -84.5 dB

680 kHz        -84 dB

720 kHz        -81 dB

780 kHz        -81 dB

Price $100.00

Shipping and Handling in North America $10.00

Shipping and Handling outside North America $18.00

100 kHz Low Pass Filter

The 100 kHz LPF is similar to the 500 kHz LPF but with a corner frequency (-3 dB point) of 100 kHz.

Specifications

Input/Output Impedance: 50 ohms

Passband Insertion Loss 100 Hz to 90 kHz: 0.5 dB

Corner Frequency (-3 dB point): 100 kHz

-60 dB attenuation point: 220 kHz

Ultimate Rejection: >70 dB from 250 kHz and above

Dimensions: 5.5 in(14 cm) x 2.5 in(6cm) x 2.25 in(6.7cm)

Connectors: SO-239 (standard), N, BNC

Filter Response

Frequency       Attenuation

100 Hz          -0.5 dB

10 kHz          -0.5 dB

50 kHz          -0.5 dB

100 kHz         -2.5 dB

120 kHz         -10 dB

140 kHz         -30 dB

200 kHz         -47 dB

225 kHz         -65 dB

250 kHz         -78 dB

300 kHz         -82 dB

400 kHz         -79 dB

500 kHz         -77 dB

600 kHz         -76 dB

700 kHz         -76 dB

800 khz         -76 dB

900 kHz         -76 dB

1000 kHz        -76 dB

Price $100.00

Shipping and handling in North America $10.00

Shipping and Handling outside North America $18.00

50 kHz Low Pass Filter

The 50 kHz Low Pass Filter is similar to the 500 kHz LPF but has a corner frequency (-3 dB point) of 50 kHz.

Specifications

Input/Output Impedance: 50 ohms

Passband Insertion Loss 0.5 dB

Corner Frequency (-3 dB point): 50 kHz

Ultimate Rejection:>75 dB from 100 kHz and above

Dimensions: 5.5 in(14 cm) x 2.5 in(6cm) x 2.25 in(6.7cm)

Connectors: SO-239 (standard), N, BNC

Frequency Response

Frequency        Attenuation

50 kHz           -3 dB

55 kHz           -6 dB

60 kHz           -13 dB

65 kHz           -21 dB

70 kHz           -27 dB

75 kHz           -32 dB

80 kHz           -34 dB

85 kHz           -44 dB

90 kHz           -59 dB

100 kHz          -85 dB

>100 kHz         -86 dB

Price $100.00

Shipping and Handling within North America $10.00

Shipping and Handling outside North America $18.00

24 kHz Low Pass Filter

The 24 kHz Low Pass Filter is similar to the 500 kHz LPF but has a corner frequency (-3 dB point) of 24 kHz.

Specifications

Input/Output Impedance: 50 ohms

Corner Frequency (-3 dB point): 23.5 kHz

-60 dB Attenuation point: 37 kHz

Passband Insertion Loss: DC to 17 kHz 1.5 dB

Ultimate Rejection: >70 dB from 45 kHz and above

Dimensions: 5.5 in(14 cm) x 2.5 in(6 cm) x 2.25 in(6.7cm)

Connectors: SO-239 (standard), N, BNC

Frequency Response

Frequency         Attenuation

10 kHz Reference +/-0 dB

15 kHz           +/-0 dB

16 kHz            -.1 dB

17 kHz            -.2 dB

18 kHz            -.3 dB

19 kHz            -.6 dB

20 kHz            -.9 dB

21 kHz           -1.3 dB

22 kHz           -1.8 dB

23.5 kHz           -3 dB

25.5 kHz           -6 dB

30 kHz            -18 dB

35 kHz            -46 dB

40 kHz            -75 dB

50 kHz            -77 dB

60 kHz            -83 dB

70 kHz            -82 dB

80 kHz            -82 dB

90 kHz            -81 dB

100 kHz           -80 dB

Price $100.00

Shipping and Handling within North America $10.00

Shipping and Handling outside North America $18.00

Custom Low Pass Filters

Kiwa can design and build custom Low Pass Filters to meet your requirements. Pricing is $150 to $200 per filter depending on the frequency and core materials.

Please feel free to contact Kiwa for your design requirements.

Kiwa Electronics

503 7th. Ave. N.E.
Kasson, MN 55944 USA
507.634.6134 phone/fax
kiwa@wolfenet.com

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