6 meter band. Low Loss Receiving Band-pass Filter - Outdoor

  • 6 meter band. Low Loss Receiving Band-pass Filter - Outdoor

50 - 51 MHz High Selectivity, High Q, Low Loss Outdoor Bandpass Filter

Bandpass Filter BPF uses high Q coils with unloaded Q of more than 1000, and capacitors with Q more than 2500. Low loss of filter is achieved with careful design and adjustment. The best receiving outdoor RFI Band-pass filter for Ham radio.

Outdoor version is especially good to place just before LNA near the antenna on the tower. This is an outdoor version. Suitable for use in the rain, snow and wind. Rain never enters this "DB" box.


The recorded data on the assembled filter with HP8753ES full 2-port calibrated are presented below.


Return Loss (S11)
Insertion Loss (S21)


Achieved results on a built Bandpass filter:

7 MHz = -90 dB
14 MHz = -72 dB
28 MHz = -45 dB
50 MHz = -0.11 dB
51 MHz = -0.12 dB
70.2 MHz = -33 dB
88 MHz = -49 dB
108 MHz = -61 dB
144 MHz = -89 dB
432 MHz = -64 dB
These excellent results were achieved by careful selection of components and design of the filter. This type of filter is necessary when you have nearby strong HF (1.8 - 30 MHz), 70 MHz, 144 MHz station or FM transmitter.
Filter characteristics for narrower band view:

Positions of connectors are selected so that the filter can be used in our "DB" plastic box for outdoor mounting.
For this type of filter, almost nothing will disturb the noise performance of preamplifiers, which is especially important in terrestrial and EME (Earth - Moon - Earth) communications. It will further ensure smooth operation in the presence of strong signals.
Filter weight: 1.25kg

Corresponding VHF band-pass filters:

6 meter band, 50 MHz Economical Bandpass Receiver for Ham:    50 - 51 MHz Economical, Low Loss Bandpass Filter

6 meter band, 50 MHz Receiver Bandpass for Ham:    50 - 51 MHz High Selectivity, High Q, Low Loss RX Bandpass

6 meter band, 50 MHz 300 W Bandpass for Ham:    50 - 51 MHz 300 W Low Loss Bandpass Filter

6 meter band, 50 MHz, 1500 W Bandpass for Ham:    50 - 51 MHz 1500W Low Loss Bandpass Filter

6 meter band, 50 MHz, 4000 W Bandpass for Ham:     50 MHz 4000 W Low Loss Bandpass Filter

We are also making filters on all frequencies and powers. Even if we don't have an offer on our site, we may be able to make it for you. So feel free to contact us.

You might also like to read about our 6 meter band antennas (50 MHz): 6 Meter High Gain Low Noise Antennas

  • Product Code: 0622
  • Availability: In Stock
  • 95.00€

Tags: 50MHz, 51MHz, 6m, 6meters, VHF, BandPass, RFI, Band-Pass, Filter, BPF, High, Q, Selectivity, Low, Loss, Receiving, Outdoors