50-51MHz 300W Low Loss Bandpass Filter BPF

50-51MHz 300W Low Loss Bandpass Filter BPF
Product Code: 0623
Price: 169.00€
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6m 300W Low Loss Bandpass Filter BPF

50 MHz Bandpass Filter BPF uses high Q coils and capacitors with Q more than 4000. Low loss of filter achieved with careful design and adjustment.

Intended to be used with Transceivers and small linear amplifiers up to 300W output.

Although intention of this filter is to be used as transmitting filter, design allows also to be used as receiving filter before wideband LNA to protect sensitive device from strong out of band signals. Excellent results will be achieved before wideband SDR receivers to monitor 6m band.

Insertion loss is excellent to put before any LNA or protect receiver from HF transmitters in DX expeditions or in multi-multi environment. This BPF will suppress any harmonic on 100 MHz, 150 MHz and more + protection from HF stations.

Although this and this RX Band-Pass filters are better for only receiving. If you could switch transmitting and receiving filter


Here are presented measured results with HP8753ES network analyzer full two port calibrated.

Return Loss (S11)

Insertion Loss (S21)



Achieved results on a built Bandpass filter:

1.8MHz=-98 dB
3.8MHz=-87 dB
7 MHz = -72 dB
14 MHz = - 53dB
28 MHz = -34 dB
50 MHz = -0.159 dB
51 MHz = -0.16 dB
88 MHz=-38dB
98 MHz = -44 dB
108 MHz = -40 dB
144 MHz = -42 dB
432 MHz = -48 dB
These excellent results were achieved by careful selection of components and design of the filter.
Band Pass filter will eliminate any harmonic emission from your linear amplifier.
More measured results with HP8753ES network analyzer full two port calibrated.
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