6m Low Noise Preamplifier with Band Pass Filter Gain Regulation

If you want to hunt 6m super weak DX signals, MS, EME, or multiband contesting, this 6m Low Noise Preamplifier with Band Pass Filter is for you. An input bandpass filter prevents overloading from other bands’ stations, while a high IP3 low noise preamplifier is essential for successful contesting, DXing, or EME. An added benefit is the gain regulation and the ability to adjust to the exact needed level.

6m Low Noise Preamplifier with Band Pass Filter 50-51MHz Appearance:

6m Low Noise Preamplifier with Band Pass Filter 50-51MHz

The most important question. Why “N” male connector on the input side of the 6m Low Noise Preamplifier and not the “N” female, as everybody put it?

If you want the lowest possible NF and, accordingly, the best receiving performance, you must pay attention to every 0.1 dB of loss on the input side of the preamplifier. Every patch cable has a loss. Even the best ones. So, how to prevent that loss of about 0.2dB? Simply by eliminating the patch cable and connecting the preamplifier directly to the coaxial relay. Thus, with minimal loss, the best possible receiving performance will be achieved.

The second most important key to the best receiving performance is input filtering. Nowadays, almost all manufacturers do not put any filtering on the input side of preamplifiers – a common source of trouble. Thanks to input filtering, this preamplifier and bandpass filter combination is much more immune to interference from strong out-of-band signals. The ultimate input bandpass filter inside the 6m Low Noise Preamplifier with Band Pass Filter 50-51MHz will eliminate all out-of-band signals from HF, 4m, 3m, 2m, or 70cm stations.

6m Low Noise Preamplifier with Band Pass Filter 50-51MHz Measurements:

1.8 MHz -75dB
3.8 MHz -62 dB
7 MHz -51 dB
14 MHz -35 dB
21 MHz -24 dB
28 MHz -14 dB
50-51 MHz +26.5 dB, NF=0.66 dB, Input RL -13dB, IP3out > 37 dBm
70 MHz -4.5 dB
100MHz -35 dB
144MHz -42 dB
432 MHz -30 dB
Power consumption +12 V / 100 mA.
Connectors: “N” Male / Female.