70 - 70.5 MHz Economic Low Loss Receiving Bandpass Filter for 4 Meter Band

  • 70 - 70.5 MHz Economic Low Loss Receiving Bandpass Filter for 4 Meter Band

4 Meter Band. Low Cost, Low Loss Receiving Bandpass Filter BPF 70 - 70.5 MHz. Small, compact band-pass filter that will suppress RFI.

70MHz-4m-RX-Band-Pass-Filter-Made-By-Antennas-Amplifiers.com

Achieved results on a built Bandpass filter:

1.8 MHz < -108 dB
3.8 MHz < -112 dB
7.1 MHz < -99 dB
14.15 MHz = -82 dB
21.2 MHz = -71 dB
28.4 MHz = - 62 dB
50 MHz = -35 dB 
52 MHz = -32 dB
54 MHz = -28 dB
70 MHz = -0.4 dB
70.5 MHz = -0.4 dB
88 MHz= -26 dB
108 MHz= -47 dB
144 MHz = -63 dB
146 MHz = -63 dB
210 MHz = -64 dB
432.1 MHz = -51 dB
440 MHz = -49 dB
These excellent results were achieved by careful selection of components and design of the filter. 
Measured data on the assembled filter with HP8753ES full 2-port calibrated are presented below. The following images show the S parameters of the most important points.
Characteristics of 70 - 70.5 MHz Band-pass filter:
4-meter-Receiving-Bandpass-Filter-70MHz-Low-Loss-Made-By-Antennas-Amplifiers.com
Characteristics of the filter outside the receiving range:
1. Measured HF attenuation:
70-MHz-4-meter-Receiving-Band-Pass-Filter-HF-Attenuation-Made-By-Antennas-Amplifiers.com
2. Measured HF - 50 MHz attenuation:
70MHz-Cheap-Receiving-BandPass-Filter-HF-6m-50MHz-Attenuation-Made-By-antennas-amplifiers.com
3. Measured VHF - UHF attenuation:
4m-4-Meters-Cheap-Band-Pass-Filter-Harmonics-UHF-Attenuation-Made-By-antennas-amplifiers.com

Similar VHF band-pass products for 4 meter band:

4 meter band, 70 MHz Bandpass filter 100 W far Ham radio: 70 - 70.5 MHz Low Loss Band Pass Filters for 100 W Transmitters

4 meter band, 70 MHz Bandpass filter 300 W for Ham radio: 70 - 70.5 MHz Low Loss Band Pass Filters for 300 W Transmitters

Fast link to our 4 Meter Antennas and Dual Band 4m 6m Antennas.

  • Product Code: 0639
  • Availability: In Stock
  • 53.00€


Tags: 70MHz, 70.5MHz, 4m, 4meters, VHF, BandPass, RFI, Band-Pass, Filter, BPF, High, Q, Low, Cost, Loss, Rx, Receiving, Field, Day, Ham, Radio