4 meter 70 MHz – 70.5 MHz 100 W Transmitting – Receiving Low Loss Band-pass Filter

139,00 

4 meter Band Pass Filter Designed for 100 W Transmitters with frequency range 70 MHz – 70.5 MHz

This filter is designed to withstand 100 W transmitters but is also ideal for receiving. Its low losses of only 0.12 dB will not be noticed in the system. Filter has 50% power margin. So even power spikes or more power wont be a problem.

70 MHz band pass filter has input return loss batter than -35 dB and more on whole 4 meter band!

External appearance for 70 – 70.5 Mhz 100 W Low Loss Bandpass filter:

4meter-70MHz-100W-Low-Loss-Bandpass-Filter-Antennas-Amplifiers.com

Achieved results on a built Bandpass filter:

1.8 MHz < -96 dB
3.8 MHz < -96 dB
7.1 MHz < -87 dB
14.15 MHz = -68 dB
21.2 MHz = -56 dB
28.4 MHz = – 47 dB
50 MHz = -20 dB
70 MHz = -0.12 dB, Input RL better than -35dB
70.5 MHz = -0.12 dB, Input RL better than -35dB
100 MHz= -15 dB
144 MHz = -38 dB
146 MHz = -39 dB
148 MHz = -39 dB
432.1 MHz = -63 dB
460 MHz = -57 dB
These excellent results were achieved by careful selection of components and design of the filter.

The 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:
 
Insertion loss 0.119 dB, return batter than 35dB.
4meter-70MHz-100W-Transmit-Receive-Bandpass-Filter-Antennas-Amplifiers.com
 
Characteristics of the filter outside the receiving range:
 
1. Measured HF attenuation:
70MHz-Bandpass-Filter-100W-HF-Suppression-Antennas-Amplifiers.com
 
2. Measured HF – 50 MHz – FM attenuation:
70MHz-Bandpass-Filter-100W-HF-6meter-FM-Suppression-Antennas-Amplifiers.com
 
3. Measured attenuation for 2 meter and 70 cm band:
70MHz-4m-Bandpass-Filter-100W-HF-50MHz-2m-70cm-Suppression-Antennas-Amplifiers.com

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 4 meter filters. We have 50 W, 100 W, 200 W, 300 W, 1500 W and 4000 W versions: 4 Meter Band-Pass Filters

Additional information

Weight 0.5 kg