6 meter 50 – 51 MHz Ultimate Low Loss Receiving Band-pass Filter for Magic Band

99,00 

50 – 51 MHz High Selectivity, High Q, Low Loss Band pass Filter BPF

Band pass Filter BPF uses high Q coils with unloaded Q of more than 1000, and capacitors with Q more than 2500. Low loss of the filter is achieved with careful design and adjustment. The best receiving band-pass filter designed for 6 meter band. Narrow Bandwidth.

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

 

6m-High-Selectivity-High-Q-Low-Loss-Bandpass-Filter-Measuring-50MHz-Made-By-Antennas-Amplifiers

 

Return Loss (S11)
Insertion Loss (S21)

 

6m-50MHz-Bandpass-filter-S11-S21-Finished-filter-Made-By-Antennas-Amplifiers

 

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 narrower band view:

 

6m-Bandpass-filter-S11-S21-Zoomed-on-network-analyzer-Made-By-Antennas-Amplifiers

 

Positions of connectors are selected so that the filter can be used in our “DB” plastic box for outdoor mounting.

 

6m-Low-Loss-Bandpass-Filter-with-144MHz-BPF-Made-By-Antennas-Amplifiers

 
 

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.

 
 

50MHz-High-Selectivity-High-Q-Low-Loss-Bandpass-Filter-Made-By-Antennas-Amplifiers

 

 

Feel free to send e-mail if you need something more specific.

All band-pass filters are here: HF, VHF and UHF Band-Pass Filters

Direct link to all 6 meter filters. We have 50 W, 100 W, 200 W, 300 W, 1500 W and 4000 W versions: 6 Meter Band-Pass Filters

 

Additional information

Weight 0,63000000 kg

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