<div dir="ltr">Hi All,<div>I was under the impression that the effective received noise from a real antenna in average conditions (on HF bands) contributes  more noise than the front end amplifier, so installing fancier preamps, in general, wont have much of a performance gain.</div><div><br></div><div>73</div><div>Byron</div><div>ZL3DXT</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Jan 18, 2019 at 4:10 PM Bob Stricklin <<a href="mailto:bstrick@n5brg.com">bstrick@n5brg.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">***** High Performance Software Defined Radio Discussion List *****<br>
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Take a look at these: <a href="https://www.sv1afn.com/j310preamp.html" target="_blank">https://www.sv1afn.com/j310preamp.html</a>,  <a href="http://advancedreceiver.com/page5.html" target="_blank">http://advancedreceiver.com/page5.html</a> for 28 MHz and up.
<div>Bob N5BRG</div>
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<div>On Jan 17, 2019, at 8:33 PM, Scott Traurig <<a href="mailto:scott.traurig@gmail.com" target="_blank">scott.traurig@gmail.com</a>> wrote:</div>
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<div>Bob,</div>
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<div>Do you have a suggestion for an HF preamp with better NF performance?</div>
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<div>73,</div>
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<div>Scott/w-u-2-o</div>
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<div dir="ltr">On Thu, Jan 17, 2019 at 9:12 PM Bob Stricklin <<a href="mailto:bstrick@n5brg.com" target="_blank">bstrick@n5brg.com</a>> wrote:<br>
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DC6NY’s comment about the first amp setting the NF is correct and the reason people add their own external preamp with better specs to improve performance. The NF of 6dB reported by W-U-2-O is high and can be improved adding a preamp which will become the first
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Bob N5BRG<br>
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