70 cm 430 – 440 MHz Ultimate Low Loss Band-pass Filter

89,00 

430 – 432 – 440 MHz High Selectivity, High Q, Super Low Loss Bandpass Filter

Band-pass Filter BPF uses high Q coils and capacitors with unloaded Q of more than 1500. Low loss of filter is achieved with careful design and adjustment. Best receiving RFI band pass filter designed for 70 cm band.

Positions of connectors are selected so that the filter can be directly connected to the coaxial relay. Band pass filter enclosed in strong 0.8 mm sheet brass box. Strong mechanics will ensure stability and longevity.
 
For this type of filter almost nothing will disturb noise performance of any wide band pre-amplifier which is especially important in terrestrial and EME communications. It will further ensure smooth operation in the presence of strong signals.
70cm-432MHz-EME-bandpass-filter-MadeBy-antennas-amplifiers.com

 

Mesured data:
 
Frequency [MHz] Attenuation [dB]
1.82 MHz > 100 dB
3.8 MHz > 100 dB
7 MHz 100 dB
14 MHz 95
21 MHz 95
28 MHz 81
50 MHz 67
54 MHz 64
88 MHz 51
108 MHz 45
144 MHz 36
146 MHz 36
Band Frequency 430 MHz 0.15 dB; S11 (Return loss): -35 dB
Band Frequency 432 MHz
0.15 dB; S11 (Return loss): -35 dB
Band Frequency 440 MHz
0.15 dB; S11 (Return loss): -35 dB
880 MHz (GSM) 20 dB
960 MHz (GSM) 25 dB
1296 MHz 43 dB

 

Measured Return Loss – S11 (CH 1) and Insertion Loss – S21 (CH 2) with HP8753ES network analyzer.
Characteristics of 430 – 432 – 440 MHz Receiving Band pass filter:
70cm-Low-Loss-Band-Pass-Filter-Measured-Data
70 cm Low Loss bandpass filer with SMA connectors
Filter characteristics zoomed.
432MHz Bandpass Filter Low Loss Measured Data Zoomed
 
 
2. Filter characteristics for HF. 
70cm-Low-Loss-Band-Pass-Filter-HF-Attenuation
3. Filter characteristics on FM frequencies and 6 meter band.
 
430-440MHz-Low-Loss-Band-Pass-Filter-HF-50MHz-88MHz-FM-Attenuation
 
4. Filter characteristics on UHF frequencies.
 
432MHz-Super-Low-Loss-Bandpass-Filter-144MHz-GSM-23cm-Attenuation
 
Similar 432 MHz band Pass filters:

70cm band, 432 MHz Receiving Bandpass for Ham: 430 – 440 MHz Receiving Band-Pass Filter. 70 cm band.

70cm band, 432 MHz Receiving Outdoor Bandpass: 430 – 440 MHz Receiving Band-Pass Filter made for outdoor. 70 cm band.

70cm band, 432 MHz 1000 W Bandpass for Ham: 430 – 440 MHz 1000 W Band-Pass Filter. 70 cm band.

70cm band, 432 MHz 1500 W Bandpass for Ham: 430 – 440 MHz 1500 W Band-Pass Filter. 70 cm band.

70cm band, 432 MHz 2500 W Bandpass for Ham: 430 – 440 MHz 2500 W Band-pass Filter. 70 cm band.

70cm band, 432 MHz 4000 W Bandpass for Ham: 70 cm 4 kW Low Pass – Notch Filter

 

Additional information

Weight 1 kg