From my Twitter feed: amateur radio course, SwiftKey, BeagleBone

Radio_2_Radio's avatarRadio Guy @Radio_2_Radio
Amateur Radio: Ken Green's Amateur Radio Course – Clovelly Donkeys ow.ly/2FczP1

f6fvy's avatarLaurent Haas – F6FVY @f6fvy
Typing revolution : SwiftKey for physical keyboards bit.ly/1fkNPq6 #contesting #ohWait

DIYEngineering's avatarDIY Engineering @DIYEngineering
Boost Your BeagleBone Black with Breakout Board – Making a PCB is easier than you might expect. Read more on MAKE ow.ly/2FireZ

From my inbox: radio demos, free EM simulation, radio builder’s BBS

Here are some items of note from my inbox:

  • My partner in crime down at WA2HOM, Ovide, K8EV, is working with Professor Ray, who does science shows for kids down at the Ann Arbor Hands-On Museum, to develop a show about radio. In researching this, Ovide happened across the Happy Scientist’s experiment on AM and FM radio waves. There are a bunch of other interesting experiments on the site, but you have to subscribe to the site, in other words pay, to view them.
  • openEMS is a free and open electromagnetic field solver using the FDTD method. Matlab or Octave are used as an easy and flexible scripting interface. I haven’t yet tried this out, but it sounds like a neat tool to play around with.
  • TheRadioBoard is a forum for the homemade radio builder. There are forums for crystal radio builders, tube radio builders, and solid state radio builders, as well as a swap forum and antenna forum.

From my Twitter feed: bipolar transistors, homebrew Buddipole, Dayton survival

Planet Analog ?@PlanetAnalog 11m
Bipolar Transistor Circuit Design & Analysis, Part 1 – There are many applications for one or two transistors. Th… http://ow.ly/2EzTJR 

 

n1pce's avatarJohn Ryan @n1pce
Homebrew Buddipole with Modifications: youtu.be/Z6ATX2Z9ews via @YouTube

You don’t have to pay a lot for a Buddipole. By making one yourself, you can not only save money, but learn something in the process.

ke9v's avatarJeff Davis @ke9v
Dayton Survival Guide ke9v.net/articles/dayto…

The Dayton Hamvention, still the largest gathering of amateur radio enthusiasts in the world, takes place May 16-18, 2014. While I disagree with Jeff’s statement, “There’s simply no way to facilitate that size of a crowd for three days in an ultra modern facility,” the rest is pretty much spot on.

From my Twitter feeds: Smith chart, inkjet PCBs, SW books

imabug's avatarimabug @imabug
Smith chart antenna-theory.com/tutorial/smith…

 

make's avatarMAKE @make
Inkjet-printed circuits being shown at #sxsw. More to come. pic.twitter.com/ohLNzedwSk

 

hamrad88's avatarTom Stiles @hamrad88
TRRS #0252 – Books for Shortwave Listeners: youtu.be/rBFLkHP8RiU?a via @YouTube

From my Twitter feed: clear-top boxes, SDR, HSMM

LA3ZA's avatarSverre Holm, LA3ZA @LA3ZA
Show off your project in a clear top tin la3za.blogspot.com/2014/02/show-o…

roteno's avatarVictor Laynez @roteno
Fun little radio housing. pic.twitter.com/QtmCw2smuW

DIYEngineering's avatarDIY Engineering @DIYEngineering
Using SDR to Read Your Smart Meter – [BeMasher] was dissatisfied with the cost of other solutions to read his smar… ow.ly/2EcLiT

kc5fm's avatarkc5fm @kc5fm
An Old Buzzard’s Guide to Getting Started with HSMM-Mesh bit.ly/1eL1cQg #ARRL #hamradio

From my Twitter feed: club resources

arrl's avatarARRL @arrl
ARRL Atlantic Division Adds Resources to Aid Amateur Radio Clubs: The ARRL Atlantic Division leadership has cr… bit.ly/1gB2ptw

Atlantic Division director Bill Edgar, N3LLR, is truly one of the directors that knows what he’s doing.

 

qrparci's avatarQRP ARCI @qrparci
The Rockmite is back ! A HF transceiver with built in keyer for $40 – qrpme.com/pages/RM%20][.… #hamr #hamradio #qrp

The Rockmite is a classic. If you haven’t built any kits lately, consider picking up one of these and doing so.

 

AlanAtTek's avatar

Alan Wolke W2AEW @AlanAtTek
Lots of folks liked my “how to test BJTs” video, and asked for a similar one on MOSFETs. Here it is: youtube.com/watch?v=gloikp…Another great W2AEW video. I don’t know how he has time to do these, but they’re certainly worth watching.

From my Twitter feed: weather radio, drones, DMR

TAUTIC's avatarJayson Tautic @TAUTIC
Really cool project! “@chasxmd: Project: Si4707 Weather Radio wp.me/p3oePO-7Q

 

XE2K's avatarJ.Héctor García XE2K @XE2K
After so many Drones in the news, Why not an 160m Vertical wire array supported by Drones ? can be the future?

 

VA3XPR's avatarVA3XPR Repeater @VA3XPR
Teach your local radio club all about Digital Mobile Radio at their next mtg. #hamr #hamradio ow.ly/tkdCb pic.twitter.com/v2cDxOoYdz

From my Twitter feed: SDR, spider coils, smart scope

vielmetti's avatarEdward Vielmetti @vielmetti
decoding radio digital modes without a radio, using WebSDR and fldigi /cc @kb6nu #hamr bit.ly/1o678qG

mike_n8wc's avatarMike Comer @mike_n8wc
@kb6nu great info! Back to radio after several years. Enjoy how the internet has enhanced enjoyment of a great radio hobby.

AK6L's avatarRobert Liesenfeld @AK6L
Taught myself PostScript and wrote a template generator for making spider-wound coils. Inspired in part by .@vk2zay. github.com/xunil/spider_c…

DH1TW's avatarTobias @DH1TW
“SmartScope – Kickstarter campaign for an open source 100MS portable oscilloscope #hamradio #diy feedly.com/k/1gr8jQm

From my Twitter feed: deep-space signals, making PCBs, SWL skeds

VoiceOfHamRadio's avatarVoice of Ham Radio @VoiceOfHamRadio
Radio Amateurs Receive Rosetta Spacecraft Signals from Deep Space zite.to/1nxMq2L via @Zite

 

hackaday's avatar

hackaday @hackaday
New post: [CNLohr] Demos His Photoetch PCB Process bit.ly/1a8TQpm

 

QSLRptMT's avatarGayle Van Horn @QSLRptMT
Still looking for winter shortwave schedules to compliment your listening ? Details at: mt-shortwave.blogspot.com

2014 Tech study guide: schematics and components (part 4)

My study guide covers the questions in T6C and T6D of the question pool in four separate sections. Overall, the question pool committee added several questions to T6C and T6D. In this section, T6D12 is an added question…Dan

There are many different types of components in modern radio equipment. Below, we will describe the types of components you will need to know about to pass the Technician Class license examination.

A relay is a switch controlled by an electromagnet. (T6D02)

Meters are devices used to indicate many different values. For example, a meter can be used to display signal strength on a numeric scale. (T6D04) Meters are also used to indicate the output voltage of a power supply, the output power of a transmitter, and many other parameters.

Integrated circuit is the name of a device that combines several semiconductors and other components into one package. (T6D09) Integrated circuits may perform either analog or digital functions. One type of analog integrated circuit that is very common is the voltage regulator. A regulator is the type of circuit that controls the amount of voltage from a power supply. (T6D05)

An LED is commonly used as a visual indicator. (T6D07) LED is short for light-emitting diode. They come in a variety of colors.

When connecting electronic assemblies together, we often use cables with one or more conductors. Some of those conductors may have a shield around them that is connected to ground. A common reason to use shielded wire is to prevent coupling of unwanted signals to or from the wire. (T6D12)