GOOZEEZZOO High Impendance Amplifier Conversion for Donut Antenna Telescope Antenna Whip Antenna Magnetic Rod Antenna for SDR Walkie Talkie Radio Receiver 800mAh Battery

No oscillation - compared to other amplifiers

I haven't really had an opportunity to use it yet, but it was a good price and I'll use it eventually.

Don't let the range of this thing fool you. It will drop in an extra 20dbi of signal across a wide range of frequencies but if you think it does it cleanly, you're dreaming. It's all garbage in/garbage out. Below UHF any antenna bigger than a paper clip that you feed into this thing will result in a mess of harmonics and noise even if you're using high dynamic range receiving equipment. For something like a handheld with a wide open front end you'll probably get a lot of copies of the biggest signals and their mixing products all over the place. Being that I have the lower frequencies covered by real antennas, I really was looking at this to amplify signals above 2.4 gHz and, amazingly, it does that well. I have connected 3dbi and 6dbi gain antennas to it for 2.4 gHz and shipped the output into a TinySA Ultra and it does a decent job of displaying the wifi and bluetooth traffic around me. My 5 gHz coverage is iffy on the TinySA Ultra but the amplifier works there as well despite the crap linearity on the receive side.The rechargeable battery is a nice touch for this....if this was offered with a better designed, lower gain amplifier it would be a great tool for lots of things. Probably the most negative thing about it of all is the power switch. When this is in the circuit and you switch if off, there's no signal pass through. Who thought that would be a good thing? The cost and complexity would have hardly budged if they had done the right thing in that regard....A/B comparisons are a solid tool and they missed the boat.

Nice little 20dB amp with battery so can be used without a power supply and hence no chance of noise from the power supply. Wish they had a 30dB and 40dB versions.

No paperwork means you have no way of ensuring correct usage - is it for receive only or can it be pit in line with the transceiver antenna? As such, not going to try it on my equipment, just in case.

This is a reasonably good preamp that is also wide band. The maximum benefits seem to be in the 1MHz-600Hz range. Exhibiting the most gain there, being at the rated spec.I did a broad spectrum analysis of the gain (S21) and calibrated the system just prior measurement. The resulting picture of the spectrum analyzer is shown in the picture. The amp was powered up by the spectrum analyzer and it's USB port is very clean. My spectrum analyzer only goes to 3GHz so that is the highest I tested. I can't comment about its response above that. It has 20dB gain up to 600MHz, then it drops off to about 13dB. So it does not meet the manufacturers claim of 20dB over the full span.It contains a battery so is handy if you have only noisy power supplies.For the price it is ok if you need 20dB at frequencies below 600MHz or so.If you need gain at higher frequencies, look elsewhere.Also take into account this is a sample size of one. There may be considerable variation between samples. Had it met the spec, I'd be more confident. But when your product is out of spec for most of its bandwidth tested, I'd be wary.

Low Noise Signal Amplifier Full Band RF Amplifier (10KHz-6GHz, Gain 20dB) ReviewThe Low Noise Signal Amplifier Full Band RF Amplifier, with its wide frequency range of 10KHz to 6GHz and a gain of 20dB, is designed for ham radio enthusiasts and professionals who need to boost weak signals across a broad spectrum of frequencies.This review will delve into various aspects of the amplifier, including its design, performance, ease of use, and overall value.Design and Build QualityThe amplifier is compact and well-constructed, with a metal casing that provides durability and shielding against electromagnetic interference. The metal enclosure is a key feature, as it protects the internal components and helps minimize noise that could degrade the signal quality.The device is lightweight and portable, making it easy to integrate into various setups, whether working in a fixed station or a mobile environment. The connectors are standard SMA type, which ensures a secure connection to antennas, receivers, and other equipment. The overall build quality is solid, giving users confidence that the device can withstand regular use in different operating conditions.PerformanceOne of the standout features of this RF amplifier is its wideband capability, covering an extensive range from 10KHz to 6GHz. This makes it suitable for various applications, including HF, VHF, UHF, and microwave frequencies. The 20dB gain is substantial, providing a significant boost to weak signals, which is particularly useful in environments with poor reception or high noise levels.The amplifier is designed to be low noise, which is crucial for maintaining the integrity of the amplified signal. Users report a clear improvement in signal strength without a corresponding increase in noise, which is a common issue with lower-quality amplifiers. This low noise figure ensures that the amplifier enhances weak signals without introducing additional interference, making it ideal for sensitive applications such as satellite communication, weak signal work, and long-distance HF operations.Ease of UseThis RF amplifier is straightforward, even for those with minimal technical expertise. The device is plug-and-play, requiring no complicated setup or calibration. Connect the input and output via the SMA connectors, power the unit, and it’s ready. The amplifier is powered via a standard DC power supply, easily sourced, and compatible with most amateur radio setups.Its compact size and portability mean it can be easily integrated into existing systems without requiring significant rearrangement of equipment. The device is also versatile enough to be used in various configurations, whether in a fixed station, portable setup, or even in mobile operations.ApplicationsGiven its wide frequency range and low noise characteristics, this RF amplifier is highly versatile and can be used in a variety of applications:Ham Radio Operations: Enhances weak signals across multiple bands, making working DX stations or operating in challenging environments easier.Satellite Communication: Improves signal reception for both uplink and downlink frequencies, crucial for clear communication with satellites.General RF Experimentation: Suitable for various experimental setups, from SDR applications to RF testing and development.Broadcast Monitoring: Enhances reception of distant or weak broadcast signals, including AM, FM, and TV signals.Value for MoneyThe Low Noise Signal Amplifier offers excellent value for its price. Its wide frequency range and 20dB gain make it a versatile tool for a wide range of applications, and its low noise performance ensures that it delivers on its promise of improving signal strength without degrading quality. Given its performance and build quality, it is competitively priced compared to other RF amplifiers in its class.This amplifier is an excellent choice for ham radio operators and RF experimenters looking for an affordable yet effective solution to boost weak signals across a broad frequency range.Pros and ConsPros:Wide frequency range: Covers 10KHz to 6GHz, making it suitable for various applications.Low noise: Enhances weak signals without introducing significant noise.Solid build quality: Durable metal casing provides protection and shielding.Easy to use: Simple plug-and-play setup with standard SMA connectors.Portable: Compact and lightweight, easy to integrate into different setups.Cons:Power requirement: An external DC power supply might not be included.Fixed gain: The 20dB gain is fixed, so it may not be adjustable to suit specific needs.ConclusionThe Low Noise Signal Amplifier Full Band RF Amplifier is a robust and versatile tool for anyone involved in ham radio, RF experimentation, or satellite communication. Its wide frequency range, low noise performance, and ease of use make it an attractive option for beginners and experienced users. While it has some limitations, such as the fixed gain, its overall performance and value make it a worthy addition to any RF setup.