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Normally an attenuator is bi-directional - you can use it connected up in either direction and it'll perform the same. Not this device - you need to take careful note of the input (male N) side and the output (female N) side. Get this wrong and you'll very likely damage the device. The first clue this isn't a true attenuator is that a return loss measurement on the input is very pleasing, showing around 35-40dB return loss. On the output side however, the return loss is considerably worse, almost unacceptable, at 7-10dB return loss. What that means, then, is this device is really a 30 watt dummy load with a 30dB sniffer port as the output. Connect the output (sniffer port) side of this device to a high power radio and you'll likely damage the device. However, that doesn't mean this device is of no use; far from it. When connected as indicated, it will provide 30dB of attenuation (+/- a little bit due to the return loss mismatch on the sniffer output port) and I measured it to be pretty flat across 1-1000 MHz. Note that the large radial fins of this device get in the way when using your fingers to tighten the N male nut up to whatever you're connecting it to. Those fins don't have their edges rounded off nicely, either. The N connector centre pins appear to be silver plated, which hints at reasonable quality. So, no, it's not lab quality. But it's good enough for field measurement purposes, and at this price, a lot lot cheaper than a lab quality instrument. Good value, and useful - so long as you know the device's limitations.Read full review
Verified purchase: Yes | Condition: New
This is a good attenuator. I measured its forward response on a calibrated HP vector network analyzer from 300 kHz to 3 GHz, and it was flat at -19.98 dB +/- 0.05 dB from 300 kHz to 1.5 GHz, rising only slightly to -19.9 dB at 3 GHz. VSWR was below 1.15:1 throughout its range, and below 1.05:1 up to 900 MHz. I have not evaluated its power-handling capabilities, but the heat sink feels substantial.
Verified purchase: Yes | Condition: New
Good value, does the job
Verified purchase: Yes | Condition: New
Good value. This is the third one I've ordered. This particular attenuator was a little loose on the N male side, but worked. The others were perfect.
Verified purchase: Yes | Condition: New
Works fine on 70-cm band. I have not put it on the VNA to see how well it does on 1-GHz. Seems to be well made, and feels solid.
Verified purchase: Yes | Condition: New
