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BEGIN:VEVENT
UID:b8b8efafc46ddca724baae9f0917b6f4
CATEGORIES:DEFAULT
CREATED:20210706T125538
SUMMARY:Second Zoom talk by Barry K3EUI on the NanoVNA
DESCRIPTION:<p style="color: #000000; font-family: -webkit-standard;"><span style="font
 -size: 14pt;">LRS Online Club Night Topic:&nbsp;<span class="Apple-converte
 d-space"></span>Nano<span class="Apple-converted-space"></span>VNA: An Ante
 nna Stethoscope Part 2</span></p><p style="color: #000000; font-family: -we
 bkit-standard;"><span style="font-size: 14pt;"><span style="font-size: 11pt
 ; font-family: Calibri, sans-serif;">Please join me tonight to take another
  look at the Nano VNA.<br /> What exactly does it measure? &nbsp;What is ca
 lculated?<br /> <br /> Are we able to interpret what each of the following 
 graphs are showing about an antenna's performance?<br /> <br /> Reflection 
 Coefficient (magnitude)<br /> Return Loss (dB)<br /> SWR<br /> <br /> Quest
 ion:<br /> Which impedance has the largest SWR value with &nbsp;50 ohm coax
  feed line:<br /> &nbsp; &nbsp; 25+jo, &nbsp;100+j0, &nbsp;40+j30, &nbsp;40
 -j30<br /> <br /> What level of attenuation (dB) in our feed line is "accep
 table" ?<br /> <br /> Then Resistance, Reactance, and Impedance: &nbsp;what
  do these mean?<br /> When operating off the resonant frequency, which chan
 ges faster: resistance or reactance?<br /> <br /> How can we correct a reac
 tance (at the antenna)?<br /> How can we correct a reactance from our shack
 ?<br /> <br /> The Smith Chart - we have to spend more time on this graph<b
 r /> The POLAR graph has some real benefits over a rectilinear X,Y graph.<b
 r /> <br /> Resonance again - &nbsp;is it always the "lowest SWR" point? &n
 bsp;<br /> Don't confuse resonance (no reactance) with the best match.<br /
 > My &nbsp;130 ft &nbsp;long 80m dipole 25 ft above ground has a much lower
  impedance than 50 ohms so without a matching coil I get a fairly large SWR
  on &nbsp;50 ohm coax. &nbsp;Now what?<br /> <br /> Bring quesions and comm
 ents to this Zoom talk.</span></span></p><p>&nbsp;</p><p style="color: #000
 000; font-family: -webkit-standard;"><span style="font-size: 14pt;"><span s
 tyle="font-size: 11pt; font-family: Calibri, sans-serif;"><span style="font
 -size: 14pt; font-family: -webkit-standard;">12</span><sup style="font-fami
 ly: -webkit-standard;">th</sup><span class="Apple-converted-space" style="f
 ont-size: 14pt; font-family: -webkit-standard;"></span><span style="font-si
 ze: 14pt; font-family: -webkit-standard;">July 2021 19.30 BST 18.30 UTC</sp
 an><br /></span></span></p><p style="color: #000000; font-family: -webkit-s
 tandard;">Join Zoom Meeting<span class="Apple-converted-space"></span><br /
 ><a href="https://us02web.zoom.us/j/9149763075?pwd=WEJicFc4U0FVNUc1MUJ6WVB3
 WlNQdz09" style="color: blue;">https://us02web.zoom.us/j/9149763075?pwd=WEJ
 icFc4U0FVNUc1MUJ6WVB3WlNQdz09</a></p><p style="color: #000000; font-family:
  -webkit-standard;">Meeting ID: 914 976 3075<span class="Apple-converted-sp
 ace"></span><br />Passcode: 0eGTG0<span class="Apple-converted-space"></spa
 n><br />One tap mobile<span class="Apple-converted-space"></span><br />+441
 314601196,,9149763075#,,,,*442838# United Kingdom<span class="Apple-convert
 ed-space"></span><br />+442030512874,,9149763075#,,,,*442838# United Kingdo
 m<span class="Apple-converted-space"></span></p><p style="color: #000000; f
 ont-family: -webkit-standard;">Dial by your location<span class="Apple-conv
 erted-space"></span><br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; +44 13
 1 460 1196 United Kingdom<span class="Apple-converted-space"></span><br />&
 nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; +44 203 051 2874 United Kingdom<s
 pan class="Apple-converted-space"></span><br />&nbsp;&nbsp;&nbsp;&nbsp;&nbs
 p;&nbsp;&nbsp; +44 203 481 5237 United Kingdom<span class="Apple-converted-
 space"></span><br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; +44 203 481 
 5240 United Kingdom<span class="Apple-converted-space"></span><br />&nbsp;&
 nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; +44 203 901 7895 United Kingdom<span cl
 ass="Apple-converted-space"></span><br />Meeting ID: 914 976 3075<span clas
 s="Apple-converted-space"></span><br />Passcode: 442838<span class="Apple-c
 onverted-space"></span></p>
CONTACT:Dave G8PGO
DTSTAMP:20260417T051549
DTSTART;TZID=Europe/London:20210712T193000
DTEND;TZID=Europe/London:20210712T220000
SEQUENCE:0
TRANSP:OPAQUE
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