tag:blogger.com,1999:blog-87144273292387072802024-03-02T09:11:40.840-08:00AA6RE Ham Rado and ElectronicsMy ham radio life and ham radio technology: SDR, DX, Digital Communications, and IOTA.Davehttp://www.blogger.com/profile/01202457666219954498noreply@blogger.comBlogger160125tag:blogger.com,1999:blog-8714427329238707280.post-15084977710464824312023-11-26T11:22:00.000-08:002023-11-26T11:22:52.818-08:00Log Potentiometer Options<p> If you need to have a log responding pot this idea may be of help:</p><p><a href="https://acidbourbon.wordpress.com/2016/10/01/brute_force_logpots/" target="_blank">Log Pots</a><br /></p>Davehttp://www.blogger.com/profile/01202457666219954498noreply@blogger.com0tag:blogger.com,1999:blog-8714427329238707280.post-33355271383317743592023-09-17T08:44:00.001-07:002023-09-17T08:44:31.896-07:00AC2CZ 50 watt Amplifier Design Article<p> A nice description of AC2CZ's 50 watt amplifier design project.</p><p><a href="https://www.g0kla.com/scpa/SimpleCheapPA.php" target="_blank">50 W Power Amp</a><br /></p>Davehttp://www.blogger.com/profile/01202457666219954498noreply@blogger.com0tag:blogger.com,1999:blog-8714427329238707280.post-38323485987272060122023-05-09T08:09:00.000-07:002023-05-09T08:09:08.702-07:00VA3ASE Satellite Antenna System<p> I just viewed this YouTube version of Alex's, VA3ASE, satellite antenna system. This is part one.</p><p><a href="https://youtu.be/m0Mv2Bev42M" target="_blank">VA3ASE Satellite Antenna System-Part 1</a><br /></p><p><br /></p><p><br /></p>Davehttp://www.blogger.com/profile/01202457666219954498noreply@blogger.com0tag:blogger.com,1999:blog-8714427329238707280.post-28373241384799577292023-05-09T07:54:00.002-07:002023-05-09T07:54:32.361-07:0010x Scope Probes: Teledyne LeCroy<p>Here is a short application note that covers 10x oscilliscope probes.</p><p><a href="https://teledynelecroy.com/doc/10x-passive-probes-appnote?" target="_blank">Teledyne LeCroy 10x Probe Application Note</a><br /></p><p>A pdf version is also available.</p>Davehttp://www.blogger.com/profile/01202457666219954498noreply@blogger.com0tag:blogger.com,1999:blog-8714427329238707280.post-78362523076718375442022-10-23T09:59:00.003-07:002022-10-23T09:59:33.559-07:00KN5L Blog Covers RF, Chokes, Transmission. Lines and Theory<p> KN5L has a very interesting blog that covers RF. transmission lines and filters/chokes with examples, practical data and theory.</p><p><a href="https://www.kn5l.net/" target="_blank">KN5L</a><br /></p>Davehttp://www.blogger.com/profile/01202457666219954498noreply@blogger.com0tag:blogger.com,1999:blog-8714427329238707280.post-82874886449740778742022-10-23T09:59:00.002-07:002022-10-23T09:59:13.100-07:00Lloyd Butler, VK5BR Website<p>I suggest anyone interesred in test and measurment, antenna tuning/matching peruse the articles of VK5BR.</p><p><br /></p><p><a href="http://users.tpg.com.au/ldbutler/index.htm" target="_blank">SITE of LLOYD BUTLER VK5BR Many articles by Lloyd Butler VK5BR have been published in journals, including Amateur Radio and OTN since the 1980's. The site has been set up to display some of the material published.</a><br /></p>Davehttp://www.blogger.com/profile/01202457666219954498noreply@blogger.com0tag:blogger.com,1999:blog-8714427329238707280.post-60746041535253123552022-07-01T09:24:00.002-07:002022-07-01T09:24:27.145-07:00WSPR article: A WHISPER (WSPR) ADVENTURE and ESP_WSPR by BARBAROS AŞUROĞLU<p> Interesting very low power WSPR project by <span style="background-color: white; color: #aaaaaa; font-family: "Open Sans", Arial, sans-serif; font-size: 14px; text-transform: uppercase;"> </span><span class="vcard author" style="background-color: white; border: 0px; color: #aaaaaa; font-family: "Open Sans", Arial, sans-serif; font-size: 14px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: inherit; margin: 0px; padding: 0px; text-transform: uppercase; vertical-align: baseline;"><span class="fn" style="border: 0px; font: inherit; margin: 0px; padding: 0px; vertical-align: baseline;"><a href="https://antrak.org.tr/author/barbarosasuroglu/" rel="author" style="border: 0px; color: #2870c2; font: inherit; margin: 0px; padding: 0px; text-decoration-line: none; transition: all 0.2s ease 0s; vertical-align: baseline;" title="Barbaros Aşuroğlu tarafından yazılan yazılar">BARBAROS AŞUROĞLU</a></span></span></p><p><a href="https://antrak.org.tr/blog/a-whisper-wspr-adventure-and-esp_wspr/" target="_blank">WSPR</a><br /></p>Davehttp://www.blogger.com/profile/01202457666219954498noreply@blogger.com0tag:blogger.com,1999:blog-8714427329238707280.post-77044785476738016792022-05-22T09:21:00.001-07:002022-05-22T09:21:39.140-07:00Miniwhip Antenna by PA3FWM<p>Nice description of a miniwhip SDR receive antenna</p><p><a href="https://www.pa3fwm.nl/projects/miniwhip/">PA3FWM miniwhip</a></p>Davehttp://www.blogger.com/profile/01202457666219954498noreply@blogger.com0tag:blogger.com,1999:blog-8714427329238707280.post-82131364194981048482022-01-11T08:11:00.000-08:002022-01-11T08:11:19.328-08:00Old Callbooks<p> Before the internet if you wanted to know the address of a HAM you would refer to the Paper Callbook.</p><p><br /></p><p>Someone has scanned them for download at:</p><p><br /></p><p><a href="https://leehite.org/callbooks/" target="_blank">https://leehite.org/callbooks/</a><br /></p>Davehttp://www.blogger.com/profile/01202457666219954498noreply@blogger.com0tag:blogger.com,1999:blog-8714427329238707280.post-67415467883054680012021-09-29T10:09:00.001-07:002021-09-29T10:09:23.379-07:00PI and SDR <p> <a href="https://hackaday.io/project/174301-raspberry-pi-sdr-cyberdeck" target="_blank">Raspberry Pi SDR Cyberdeck174301-raspberry-pi-sdr-cyberdeck</a></p>Davehttp://www.blogger.com/profile/01202457666219954498noreply@blogger.com0tag:blogger.com,1999:blog-8714427329238707280.post-52065655285143516082021-02-01T10:40:00.002-08:002021-02-01T10:40:46.391-08:00I/Q Signal Tutorial<p> Here is a tutorial from GNU Radio describing I/Q signals.</p><p><a href="https://wiki.gnuradio.org/index.php/IQ_Complex_Tutorial" target="_blank">I/Q Signal Tutorial</a><br /></p>Davehttp://www.blogger.com/profile/01202457666219954498noreply@blogger.com0tag:blogger.com,1999:blog-8714427329238707280.post-83260816876323403502020-10-04T07:36:00.003-07:002020-10-04T07:36:47.491-07:00French national amateur radio society REF <p><br /></p><table border="0" cellpadding="0" cellspacing="0" style="color: black; font-family: Verdana, Arial, Helvetica, sans-serif; width: 100%px;"><tbody style="box-sizing: border-box;"><tr style="box-sizing: border-box;"><td style="box-sizing: border-box;"><div id="story" style="box-sizing: border-box; float: left; font-size: 16px; height: auto; width: 619px;"><h1 style="box-sizing: border-box; font-size: 16pt;">REF Digital Library Available </h1><p style="box-sizing: border-box;">French national amateur radio society <strong style="box-sizing: border-box;">REF</strong> have made available their digital library covering antennas and other ham topics.<br style="box-sizing: border-box;" /><br style="box-sizing: border-box;" /><a href="https://publications.r-e-f.org/" style="box-sizing: border-box; color: #003366; overflow-wrap: break-word; text-decoration-line: none;" target="_blank">REF Library</a></p></div></td></tr></tbody></table>Davehttp://www.blogger.com/profile/01202457666219954498noreply@blogger.com0tag:blogger.com,1999:blog-8714427329238707280.post-43761255313658754132020-09-20T09:48:00.002-07:002020-09-20T09:48:13.927-07:00 AMSAT Live OSCAR Satellite Status Page<p> AMSAT Live OSCAR Satellite Status Page</p><p><a href="https://www.amsat.org/status/index.php" target="_blank">AMSAT Satellite Status</a><br /></p>Davehttp://www.blogger.com/profile/01202457666219954498noreply@blogger.com0tag:blogger.com,1999:blog-8714427329238707280.post-39710173726421600072020-09-05T14:48:00.001-07:002020-09-05T14:48:32.532-07:00EME Station by Fred, AB1OC<h2 style="text-align: left;"> EME Station by Fred, AB1OC</h2><p><br /></p><p>Here is a nice 10-part blog post describing a EME station from design and planning through antennas on the tower.</p><p><a href="https://stationproject.blog/2019/10/21/eme-part1-goals-station-design/" target="_blank">EME Station Design and Construction</a><br /></p><div><br /></div>Davehttp://www.blogger.com/profile/01202457666219954498noreply@blogger.com0tag:blogger.com,1999:blog-8714427329238707280.post-46921233010545065292020-08-30T07:53:00.000-07:002020-08-30T07:53:31.383-07:00G7UHN has built a very useful additional display for the FT-817/818 transceiver.<p> </p><p><span style="background-color: white; color: #444444; font-family: "Open Sans", Helvetica, Arial, sans-serif; font-size: 14px;">Andy, G7UHN has built a very useful additional display for the FT-817/818 transceiver.</span></p><p><br /></p><p><a href="https://swling.com/blog/2020/08/andy-builds-a-genius-companion-control-display-for-the-yaesu-ft-817-transceiver/" target="_blank">T-817 Display Accessory </a></p><p><br /></p><p><br /></p>Davehttp://www.blogger.com/profile/01202457666219954498noreply@blogger.com0tag:blogger.com,1999:blog-8714427329238707280.post-52813467870436363882020-08-29T19:04:00.000-07:002020-08-29T19:04:01.486-07:00SDR Software Tutorial <p>This is quite interesting as it shows how software is written for SDR radios. It is from the AC2CZ web.</p><p><br /></p><p><a href="https://www.g0kla.com/sdr/index.php" target="_blank">SDR Radio Software Tutorial</a><br /></p>Davehttp://www.blogger.com/profile/01202457666219954498noreply@blogger.com0tag:blogger.com,1999:blog-8714427329238707280.post-45620089059607496982020-04-11T13:18:00.001-07:002020-04-11T13:24:34.936-07:00High Voltage Transformer Winding InformationHigh Voltage Transformer Winding Information<div><br /></div><div><a href="https://ludens.cl/Electron/trafos/trafos.html">Transformer winding</a><br /></div><div><br /></div><div><br /></div><div>KF8OD has some examples of homemade transformers.</div><div><br /></div><div><a href="https://www.qsl.net/kf8od/c-core1.html" target="_blank">Transformer Build</a><br /></div><div><br /></div>Davehttp://www.blogger.com/profile/01202457666219954498noreply@blogger.com0tag:blogger.com,1999:blog-8714427329238707280.post-62293085931619563272020-04-07T11:08:00.003-07:002020-04-07T11:08:59.122-07:00Amateur Radio Magazine from the American Radio Relay League - Early IssuesScanned QST issues covering 191 to 1949.<div><a href="https://www.americanradiohistory.com/QST.htm" target="_blank">https://www.americanradiohistory.com/QST.htm</a><br /></div>Davehttp://www.blogger.com/profile/01202457666219954498noreply@blogger.com0tag:blogger.com,1999:blog-8714427329238707280.post-28360252721730669472020-04-04T10:21:00.002-07:002020-04-04T10:21:49.705-07:00RFI Site Survey Using an SDR by NK7ZNKZ uses an SDR monitor a wideband width over 24 hours to determine possible sources of RFI.<br /><div><br /></div><div><a href="https://www.nk7z.net/" target="_blank">RFI Site Survey Using SDR by NK7z.net</a><br /></div>Davehttp://www.blogger.com/profile/01202457666219954498noreply@blogger.com0tag:blogger.com,1999:blog-8714427329238707280.post-7850157094383405522020-03-01T09:00:00.001-08:002020-03-01T09:00:59.318-08:00Simple Field Strength Meter VE7SARA simple way to make a FS meter using a DVM.<br />
<br />
<a href="https://ve7sar.blogspot.com/2018/03/a-simple-field-strength-meter.html" target="_blank">VE7SAR Simple Field Strength Meter</a>Davehttp://www.blogger.com/profile/01202457666219954498noreply@blogger.com0tag:blogger.com,1999:blog-8714427329238707280.post-49734898397196536032020-02-11T08:52:00.000-08:002020-02-11T08:52:06.813-08:00How to Put a Bitx40 on 60M by ND6T"60 meters in the U.S. is pretty limited, currently only 5 fixed channels and limited to 100 watts effective radiated power, and so it is seldom addressed in commercially built gear. It has good propagation for nearby communication and there is a possibility that a new segment (not channels!) will soon be authorized for QRP operation. The BITX would be perfect since it is easy to program for new allocations."<br />
<br />
<br />
<br />
<a href="http://www.nd6t.com/bitx/bitx60.htm" target="_blank">Bitx on 60 meters</a><br />
<br />
<a href="http://www.nd6t.com/bitx/bitx60.htm">http://www.nd6t.com/bitx/bitx60.htm</a>Davehttp://www.blogger.com/profile/01202457666219954498noreply@blogger.com0tag:blogger.com,1999:blog-8714427329238707280.post-75372040583223827952020-01-01T09:59:00.001-08:002020-01-01T09:59:36.954-08:00A Brief History of The Development of Classical ElectrodynamicsA Brief History of The Development of Classical Electrodynamics<br />
By Professor Steven Errede<br />
<br />
<a href="http://web.hep.uiuc.edu/home/serrede/P435/Lecture_Notes/A_Brief_History_of_Electromagnetism.pdf" target="_blank">A Brief History of Electromagnetism</a>Davehttp://www.blogger.com/profile/01202457666219954498noreply@blogger.com0tag:blogger.com,1999:blog-8714427329238707280.post-79808765475824683022019-12-31T11:47:00.002-08:002019-12-31T11:48:47.760-08:00Diode Ring Mixers via Ryan Flowers<br />
<br />
Diode Ring Mixers via Ryan Flowers<br />
<br />
<a href="https://miscdotgeek.com/building-a-direct-conversion-receiver-part-3/" target="_blank">Diode Ring Mixer</a>Davehttp://www.blogger.com/profile/01202457666219954498noreply@blogger.com0tag:blogger.com,1999:blog-8714427329238707280.post-81592405670496586482019-12-31T11:41:00.002-08:002019-12-31T11:48:31.873-08:00Bifilar and Trifilar Wire TwistingOver at QRPLabs@groups.io there is s discussion going on about Bifilar and Trifilar wire twisting:<br />
<a href="https://groups.io/g/QRPLabs/topic/69340205" target="_blank">Bifilar and Trifilar Wire Twisting Discussion</a><br />
<div>
<br /></div>
Davehttp://www.blogger.com/profile/01202457666219954498noreply@blogger.com0tag:blogger.com,1999:blog-8714427329238707280.post-39813107889318578132019-12-31T11:19:00.003-08:002019-12-31T11:19:38.902-08:00W2NDG's RadioKitGuide.com <br />
W2NDG's RadioKitGuide.com UPDATED 12/10/2018<br />
<br />
<br />
<a href="http://fofio.blogspot.com/2015/07/radio-kit-guide.html" target="_blank">Radio Kit Guide</a><br />
<br />Davehttp://www.blogger.com/profile/01202457666219954498noreply@blogger.com0