Teyleten Robot 0.1-2000MHz RF Wideband Amplifier Broadband Module Receiver Gain 30dB Low-Noise LNA

I have used the amplifier and it works. I don't have the calibrated instruments to offer any real analysis of performance, but when I applied power and connected to a 10 MHz signal source I could see a lot of amplification. I discovered a reference that said if the amplifier is operated with a voltage between 5-8 V it operates as a variable gain amplifier. I discovered that to be the case.

It was hard to resist for the price so I thought I'd give it a shot. I tested it with my nanoVNA. First, gain went from 32.2 dB at 1 MHz to 31 dB at 500 MHz. (I didn't test any higher.) Next I wanted to see if it stayed linear up to the +10 dBm output specification. FIrst I checked with an oscilloscope at 30 MHz. The sine wave looked pretty good. I also looked at 50 MHz and it still looked good. I followed this with a check using my tinySA. The spectrum looked good at 10 dBm out and even a bit higher. From 30 MHz, the 2nd harmonic was at -45 dB, 3rd at -31 dB and 4th at -40.5 dB.This is all with a 12 VDC supply. Supply current was from 22 mA to 25 mA. The gain dropped by 2 dB as I dropped the supply voltage from 12 VDC to 9 VDC.

Almost zero signal. Tried 12v and 9v, limited reception to a transmitter about half a mile from me, when without the "amplifier" I had been getting transmitters out to 35 miles. Verified polarity, voltage, and RF signal input.

With this device, i can pick up the emissions from my little regenerative receiver and actually see what frequency the receiver is tuned to (since the receiver has no calibrated tuning dial).With an AD-8307 dBm meter (measures power less than 1 mW), i verified that this pre-amp is putting out only about 0.1mW total RF power. The tinySA can handle only up to 10mW (10dBm), so this pre-amp is safe to use with my tinySA.

Not a high-end pre-amp, but good enough for prototyping superhet receivers. Front end overloads easily.

Reviews are varied, but I ordered 2 and they worked just fine.

Works best on all 50 ohm impedance receiving systems > 10 mhz...A post-Lna Preselector helps to optimize S/N reception..Very satisfied with Lna product..Started right up on 12 vdc battery. ..Makes the difference to hear the weak stations...

Used regulated power supply to be certain not to damage unit and it provided ZERO amplification. Tried unit on several antenna / radio combinations and it provided no amplification what so ever in fact it caused a total loss of signal on a 900 MHz receiver setup. Save your money, Garbage.............