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Author Topic: NB and NR Performance Comparisons?  (Read 16576 times)
NO2A
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Posts: 769




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« Reply #15 on: October 09, 2012, 09:40:22 AM »

I usually leave the preamp on to hear the weak ones. I`ll try using some attenuation when that happens.
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W4OP
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Posts: 415


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« Reply #16 on: October 09, 2012, 11:37:07 AM »

You should never need a preamp below 20M unless something is wrong with the rig or you are using a very low gain RX only antenna.
Using the preamp on the low bands degrades your IP3 and blocking dynamic range.
Here's a short article on using preamps and attenuators on HF. VHF/UHF is a different story.
http://www.arraysolutions.com/Products/appnote_preamps.htm
YMMV,

Dale W4OP
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ND6P
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Posts: 81




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« Reply #17 on: October 10, 2012, 09:28:03 PM »

I went from a 756 Pro3 to the TS-590S and noticed too that the NR was not as good on the latter. 

It would be great if the ARRL Product Reviews would include NB and NR performance measurements.
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LA9XSA
Member

Posts: 376




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« Reply #18 on: October 15, 2012, 01:26:21 AM »

The NB on my FT-817ND does make the wideband electric fence pulses more bearable, but it doesn't cancel it completely. The pulses are like clockwork, so I guess that helps the NB, but they're S9 so perhaps more than the ignition noise that the NB was meant to deal with.
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