Nooelec SMA Attenuator Kit - Bundle of 6pc 2W 50 Ohm SMA in-Line Attenuators Provides Highly Linear Attenuation from 1dB to 42dB in 1dB Increments. 1dB, 2dB, 3dB, 6dB, 10dB

Adequate for most non-Hams working on the 2.4Ghz ISM bands which are limited to 30 dBi (1 watt) here in the U.S. It's a handy set to complement my electronic attenuator, and a necessity if you are working with an SA or VNA. These are 50 ohm SMA devices, so it you are working satellite stuff, you may need 75 ohm "F-type" anttenuators. Fairly priced and looks to be nice build quality, I'll give them 5 stars, and update if I find any significant discrepancies. Cheers!

These provide 1 to 42dB of attenuation in 1dB steps. Note that they are are limited to 2W power but putting them in-line AFTER something like a 40dB or 30dB, 50 Ohm,100W attenuator allows them to provide 1dB adjustments across a huge range making the combination perfect for adjusting something like the output from a 50W or 100W amateur radio to a range useful as the input for a receiver, spectrum analyzer or oscilloscope without damaging it. Note, some suitable combination of these goes AFTER another purchased big, high power attenuator when hooking many transmitter outputs to a device like a receivdr or spectrum analyzer. These just provide the ability to use a set that adjusts the final power after a high power attenuator to a good level for the input and are well worth the investment alongside a large, high power attenuator when using something like a desktop amateur radio with something like a tinySA spectrum analyzer. I bought two of these Nooelec Attenuator Kits because I also have 3x 100W attenuators (40dB, 30dB, 20dB) and 3x 10W attenuators (30dB, 20dB, 10dB) and can take one or two of my 100W or 5-9W ham rigs and plug them in comfortably to other devices like a receiver or spectrum analyzer using these for 1dB resolution input power tuning while testing.

Measured on my VNA, these provide relatively flat attenuation from 10khz past 9GHz (my VNA's BW limit), not 3G like the listing states. S11 and S22 are also below 20dB over the whole range. Excellent frequency response for such a cheap attenuator! 10dB screenshot attached as an example.

Great for RF prototyping and protecting the input to your spectrum analyzer. One end male, other end female for easy "stacking".

I always place an attenuator in place before connecting my measuring equipment in place. You never know what might happen and you want to ensure you don't damage your equipment.

I was impressed with the build. I have not tested the accuracy of the attenuators. For those who use SMA connected devices, this seems to be the perfect solution to add attenuation without clumsy adapters to match to different types. I bought these for my Tiny Spectrum Analyzer.

Playing with low power HF and needed attenuation to reduce 200 mW to lower power. These are perfect and give me a way to try different combos for downward steps. Good quality

We use these for situations where there is too much output power and bi-directional amplifiers cause interference. Make sure you know the type of connections your amp has, some are N-connectors not SMA. Anyways, these work great!

Como es habitual, recibido en tiempo garantizado. En cuanto al comentario respecto a los atenuadores, adjunto imágenes con los resultados medidos en el caso del de mayor atenuación (-20dB) que es el que mayor desviación del valor nominal pudiera presentar. Las imágenes corresponden a las calibraciones: 1 a 60 MHz 130 a 170 MHz 400 a 480 MHz 10 KHz a 4,4 GHz Las tres primeras medidas arrojan resultados con valores más o menos lineales. Donde más se aprecia una ligera “no linealidad” es en la calibración de 10 KHz a 4,4 GHz donde se puede apreciar que a partir de poco más de unos 2 GHz hay una ligera oscilación en el valor medido. Por supuesto que no son elementos de laboratorio, pero por el precio que tienen son aceptables para trabajos no profesionales.

Die Teile weisen sehr gute Werte auf. Messergebnisse passen exakt zu meinem VNA. (kein R&S) Sehr gut verarbeitet.

Ho acquistato 2 set di attenuatori al prezzo di 45.95 euro ciascuno, consegna puntuale e valore nominale degli attenuatori come da descrizione. Li ho caratterizzati a 144, 432 e 1296 MHz con VNA calibrato e questi sono i dati che ho ricavato: Precisione sul valore di attenuazione S21: entro +- 0.1 dB per tutti i pezzi tranne i 2 attenuatori a -6 dB (-5.83...-5.89 dB misurati) e 1 attenuatore a -20 dB (-19.84...-19.93 misurati). Return loss S11 e S22: per 144 e 432 MHz sempre migliore di -40 dB (SWR 1.02). A 1.2 GHz sempre migliore di -35 dB (SWR 1.04). Per i miei scopi sono ottimi!

Atténuation de signal pour analyseur de spectre

Great little kit for the ham shack, recommended!