70cm Low Noise Preamplifier with Band Pass Filter 430-450MHz

This 70cm Low Noise Preamplifier with Band Pass Filter consists of a super low-loss input band-pass filter with a low noise preamplifier. An integrated 70 cm Bandpass filter is perfect for suppressing all out-of-band signals from HF, 6m, 4m, 2m, or 23cm stations. This preamplifier is very immune to out-of-band signals.

 

70cm Low Noise Preamplifier with Band Pass Filter 430-450MHz Appearance:

Measured results of 70cm Low Noise Preamplifier with Band Pass Filter 430-450MHz

28.4MHz -52  dB
50.11MHz -40  dB
70 MHz -33 dB
88MHz -27 dB
108MHz -22 dB
144MHz -15 dB
222MHz -1 dB
430MHz + 20.3dB NF = 0.63 dB Input RL better than -18dB
432.1MHz +20.3dB NF = 0.63 dB Input RL better than -18dB
450MHz + 20.1dB NF = 0.63 dB Input RL better than -18dB
720.5MHz -1 dB
864.2MHz -12dB
1240MHz -29dB
1296.1MHz -32dB
IP3out >37dBm
Power consumption: +10-15V / 100mA

These excellent results were achieved by careful selection of components and design. Thanks to input filtering, the preamplifier and bandpass filter combination are significantly less susceptible to interference from strong out-of-band signals. Compared to output filtering.

 

Outdoor mounting of 70cm Low Noise Preamplifier 430-450 MHz:

 

 

70cm Low Noise Preamplifier with Band Pass Filter 10m 6m 4m FM Gain

 

70cm LNA with Band Pass Filter measured 6m, 2m, 1.25m, and 23cm Gain

 

430-450MHz 70cm LNA with Band Pass Filter Measured 70cm Band Data

 

70cm Low Noise Preamplifier with Band Pass Filter Harmonics Suppression

 

Bandpass filter enclosed in a strong 0.8mm sheet brass box. Strong mechanics will ensure stability and longevity.

All low-noise amplifiers: Low-Noise Amplifiers