<html><head></head><body style="zoom: 0%;"><div dir="auto">Hi Tom --<br><br></div>
<div dir="auto">Our local VHF/UHF group did a project making noise sources for noise figure measurement. A couple of the guys, especially Tom Holmes, N8ZM, developed a lot of knowledge along the way. I'm sure he'd be willing to help out with that part of the design.<br><br></div>
<div dir="auto">John</div>
<div class="gmail_quote" >On Jun 24, 2019, at 10:58 PM, Tom McDermott via TangerineSDR <<a href="mailto:tangerinesdr@lists.tapr.org" target="_blank">tangerinesdr@lists.tapr.org</a>> wrote:<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div>I forgot to take notes from the call tonight, likely could not have kept Someanyway !</div><div><br></div><div>Some RF noise generators I could find schematics for on the web are based on Zener diode noise source</div><div>plus amplifier. Other noise generator components are available, I think QEX has had articles in the past on this subject. <br></div><div><br></div><div>Here are the links from tonight's Teamspeak session - a whole lot of good material there.</div><div><br></div><div>** Today<br><17:59:20> *** You are now talking in channel: "TangerineSDR"<br><18:13:06> "Scotty WA2DFI W10": <a href="https://www.amazon.com/Seeing-Dark-Amateur-Astronomers-Discovering-ebook/dp/B009R4O7PY/ref=sr_1_4?keywords=seeing+in+the+dark&qid=1561425132&s=gateway&sr=8-4" target="_blank">https://www.amazon.com/Seeing-Dark-Amateur-Astronomers-Discovering-ebook/dp/B009R4O7PY/ref=sr_1_4?keywords=seeing+in+the+dark&qid=1561425132&s=gateway&sr=8-4</a><br><18:13:18> "Mike - AA8K": Not having luck with my audio. Dave - KV0S may be ill, he also missed the OpenHPSDR TeamSpeak meeting.<br><18:13:36> "Scotty WA2DFI W10": OK, hope he is OK!<br><18:15:09> "Mike - AA8K": Are we still considering the DX Engineering active antennas with the 2.5 meter whips for the PSWS?<br><18:22:01> "Nathaniel W2NAF": <a href="https://cedarweb.vsp.ucar.edu/wiki/index.php/2019_Workshop:Main" target="_blank">https://cedarweb.vsp.ucar.edu/wiki/index.php/2019_Workshop:Main</a><br><18:23:04> "Mike - AA8K": ...<br><18:24:03> "Nathaniel W2NAF": <a href="https://www.dxengineering.com/parts/dxe-arav4-1p" target="_blank">https://www.dxengineering.com/parts/dxe-arav4-1p</a><br><18:25:37> "Mike - AA8K": Isn't that $350 each?<br><18:25:46> "Scotty WA2DFI W10": yes!<br><18:26:15> "Mike - AA8K": That was my next question; cross polarization.<br><18:26:39> "Nathaniel W2NAF": <a href="http://hamsci.org/article/new-rbn-receivers-new-jersey" target="_blank">http://hamsci.org/article/new-rbn-receivers-new-jersey</a><br><18:31:35> "Mike - AA8K": How can we use a reference antenna for calibration?<br><18:33:48> "Mike - AA8K": Is the whip sag an issue?<br><18:33:59> "Nathaniel W2NAF": No, the sag should be fine.<br><18:47:58> "Nathaniel W2NAF": <a href="https://radiojove.gsfc.nasa.gov/" target="_blank">https://radiojove.gsfc.nasa.gov/</a><br><18:52:03> "Scotty WA2DFI W10": <a href="https://radiojove.gsfc.nasa.gov/telescope/equipment_manuals.htm" target="_blank">https://radiojove.gsfc.nasa.gov/telescope/equipment_manuals.htm</a><br><19:10:24> "Nathaniel W2NAF": <a href="http://hamsci.org/hamsci-workshop-2019-agenda" target="_blank">http://hamsci.org/hamsci-workshop-2019-agenda</a><br><19:12:59> "Nathaniel W2NAF": <a href="http://hamsci.org/publications/hamsci-hf-receiver-requirements" target="_blank">http://hamsci.org/publications/hamsci-hf-receiver-requirements</a><br><19:13:59> "Nathaniel W2NAF": <a href="https://github.com/MITHaystack/digital_rf" target="_blank">https://github.com/MITHaystack/digital_rf</a><br><19:23:29> "Tom N5EG": Installers for Windows Gnuradio: <a href="http://www.gcndevelopment.com/gnuradio/downloads.htm" target="_blank">http://www.gcndevelopment.com/gnuradio/downloads.htm</a><br>*** End of chat history</div><div><br></div><div><br></div><div><br></div><div>AM broadcast groundwave field strength correction tables from the FCC:</div><div> <a href="https://www.fcc.gov/media/radio/am-groundwave-field-strength-graphs#block-menu-block-4">https://www.fcc.gov/media/radio/am-groundwave-field-strength-graphs#block-menu-block-4</a></div><div><br></div><div>FCC AM broadcast station technical query page:</div><div> <a href="https://www.fcc.gov/media/radio/am-query">https://www.fcc.gov/media/radio/am-query</a><br></div><div><br></div><div><br></div><div><br></div><div>-- Tom, N5EG</div><div><br></div></div></div></div></div>
<pre class="blue">-- <br>TangerineSDR mailing list<br>TangerineSDR@lists.tapr.org<br><a href="http://lists.tapr.org/mailman/listinfo/tangerinesdr_lists.tapr.org">http://lists.tapr.org/mailman/listinfo/tangerinesdr_lists.tapr.org</a><br></pre></blockquote></div></body></html>