This week we take a look at directional antennas.
Our Website - http://www.hamradioworkbench.com/ Follow us on Twitter - https://twitter.com/hamworkbench Contact us - http://hamradioworkbench.com/contact Connect with us on Facebook - https://www.facebook.com/groups/hamradioworkbench/ BrandMeister Talkgroup 31075 - https://hose.brandmeister.network/group/31075/ Digilent Analog Discovery 2 HRWB Bundle - https://store.digilentinc.com/ham-radio-workbench-bundle/ Coupon Code HamRadioWorkbench2021 PackTenna TrekMount portable VHF antenna http://www.packtenna.com Lab599 TX-500: https://lab599.com Portable: mcHF http://www.m0nka.co.uk/ Transverter va3mw was talking about https://www.ebay.com/itm/254510549922?hash=item3b4202cba2:g:k5UAAOSwAi9fFz6O Flex radio WaveForms https://www.flexradio.com/documentation/smartsdr-waveform-api-pdf/ UHSDR on Github https://github.com/df8oe/UHSDR/wiki Home: Flex 6400 https://www.flexradio.com/products/flex-6400-signature-series-sdr-transceiver/ Attended FDIM, won a SoftRock RXTX Ensemble! Not sure what to do with it… :-D http://fivedash.com/index.php?main_page=product_info&products_id=7 Morse tutor www.w8bh.net Virtual ham band on the internet, V Band https://hamradio.solutions/vband/ MG Chemicals conductive paints https://www.mgchemicals.com/category/conductive-paint/ RS-485 magnetometer https://4o3a.com/azimuth-magnetic-sensor 20v Dewalt tool family https://www.dewalt.com/products/power-tools/shop-by-cordless-platform/20v Antenna Theory Directivity The National Film Board of Canada for the Canadian Air Forces - Great explanation of Directivity. https://www.youtube.com/watch?v=ysNkjEnoRsU Antenna Fundamentals Bandwidth. Military Training film. https://www.youtube.com/watch?v=v6VE9xoA_6M&t=569s Urban Beam: https://helpdesk.flexradio.com/hc/en-us/articles/202118688-How-to-Submit-a-Request-for-Technical-Support#:~:text=Just%20click%20on%20the%20Sign,of%20the%20HelpDesk%20home%20page https://consumer.steppir.com/shop/horizontal-antennas/2-element-antenna-products/urbanbeam-package/ What ever happened to the quad? Used to be popular https://www.electronics-notes.com/articles/antennas-propagation/cubical-quad-antenna/quad-basics.php Smitty’s Comet H-422 https://www.cometantenna.com/wp-content/uploads/2013/09/H-422-instructions.pdf Mark’s setup: https://youtu.be/Jd3iCfUe9H8 Doublet http://webclass.org/k5ijb/antennas/All-Band-Doublet.htm
9 Comments
David m0tfy
6/2/2021 18:48:44
Another great episode. Thanks
Reply
Mark N9TCA
6/3/2021 12:50:28
Great episode. As soon as I got home I have been anxiously looking through the web site for Vince's audio switching notes/schematic. Any chance that is coming soon?
Reply
George
6/3/2021 13:24:18
Hi Mark, I just updated the HRWB web site. Look in the Articles section for Vince's pics and schematic.
Reply
Mark N9TCA
6/3/2021 13:37:08
Super, Thanks!
Steven AI5BH
6/4/2021 15:13:52
If you haven’t seen it yet, you can use QSOBot on the Morserino32 and have lovely QSOs with robots. You configure the WiFi peer, connect and send a qrl? It should respond with a k and then you can call CQ and start up a QSO with a virtual ham.
Reply
6/14/2021 16:38:32
Hi guys! Allow me to make some comments on HRWB 130:
Reply
Patrick Dell
7/9/2021 12:51:04
Just a small clarification on DC motors (2-wire brushed or 3-phase brushless) regarding a comment Mike made around 51:39 about lower voltage and "should be more torque" for the tower rotor... I offer a slight correction in mental model in the spirit of the amazing generosity your talented group provides to the community's collective lawn mowing experience.
Reply
9/16/2022 03:40:42
Great topic!
Reply
9/16/2022 03:43:53
Also, I heard the words “log periodic” mentioned, but no one picked up to comment further. Another fantastic design. While there is some trade-off when comparing to a yagi of similar size, the major benefit is broadband capability on a single feedline. Sure, the gain is not quite what you may find with a mono-band yagi, but the ability to spin the dial from 13-30MHz without the need for a tuner is nice. F/B ratio and rear/side rejection ranks well too.
Reply
Leave a Reply. |
SubscribeArchives
November 2022
Categories
All
|