This high performance filter is designed for those who suffer from Broadcast Band (BCB) interference. It is especially helpful for those who DX the lower shortwave fequencies (< 7 MHz) where spurious BCB signals appear.

The BCB filter is inserted between the antenna and the receiver. Any BCB signal below 1.70 MHz is heavily attenuated. Signals above 1.75 MHz pass with virtually no attenuation.

There are several distinguished characteristics to the Kiwa BCB Filter. The first, which is the most important, is the unusually steep filter slope response. Other important characteristics are the low passband insertion loss and the flat passband response. Together they provide a level of performance that sets the Kiwa BCB Filter apart from other designs.

Specifications:

• Input/Output Impedance: 50 ohms

• Passband insertion loss @ 3.0 MHz: -0.5 dB

• -60 dB attenuation point: 1.22 MHz
  Signals below 1.2 MHz are attenuated 60 dB

• Static protection is provide on the input.

Filter Response

...[I have serious] overload problems on 160 (and with any serious antenna on 80 or 40) from the numerous local BC'sters. I just got a BC reject filter from Kiwa Electronics and let me tell you, it does the job. My overload level is 50 dB over S9 and even some attenuation and series traps can't get rid of it completely, without getting rid of the signals in-band, too. I popped this little box in the RX ANT loop on the FT-990 and was thrilled to find the overload spanked down to the expected S3-5 local noise level.

It also cleaned up a multi-station spur at 3550 and eliminates BC coming down the line from the 40-2CD from upsetting the SWR-shutdown circuitry in the amplifier output. It slices, it dices...

BCB Extension Filter

The BCB Extension Filter is a second BCB Rejection Filter for serious attenuation across the broadcast band. The Extension Filter is used in conjunction with the above BCB Rejection Filter. The filters are connected is series with the BCB Rejection Filter first in line, followed by the Extension Filter. A short coax, which is provided, connects the two filters.

Typical response of both filters is as follows:

3.0 mHz            -2.0 dB

2.0 mHz            -33 dB

1.8 mHz            -50 dB

1.6 mHz            -76 dB

1.4 mHz            -84 dB

1.2 mHz            -89 dB

1.0 mHz and below  >95 dB

Price for both filters (BCB Rejection Filter and BCB Extension Filter) $120.00

Shipping and Handling for both filters within North America $10.00

Shipping and Handling for both filters outside North America $15.00

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