LHS Episode #206: Hamlib Deep Dive

Thanks for tuning into another episode of Linux in the Ham Shack. In this episode we take an in-depth look at the wonder of hamlib, the software that binds applications to your amateur radio hardware. It's cross platform, small, actively developed and wonderful in general. Hope you enjoy. Please make sure to send us your feedback about the topic, the show or just a quick hello.

73 de The LHS Crew


Russ Woodman, K5TUX, co-hosts the Linux in the Ham Shack podcast which is available for download in both MP3 and OGG audio format. Contact him at [email protected].

Alexa Can Be Your Ham Shack Assistant!

Is Alexa your ham shack assistant? She has certainly become an indispensable addition to my shack.

Alexa is Amazon’s AI voice assistant. Alexa’s voice emanates from the several Amazon Echo products, like the Echo Dot, Echo Spot, Echo Show, Echo Plus, and Fire TV, among others to be announced.

Here are several Alexa related activated skills and applications that I have found especially useful in my ham shack, and you may find useful and fun to use in your shack, too. Some of these I use several times a day, while others I rarely use, and frankly, some of these applications are a bit of a challenge to get to work the way they should. So, you will discover that you have to ask Alexa just the right way; otherwise, she can get pretty uncooperative and frustrating!

Also, many of these services must be enabled before you can use them; for example, before you can use the Call Sign Skill, you need to say:

Alexa, enable Call Sign

Then, it should work just fine for you.



Video courtesy of Essex Ham

Now, here is a list of Alexa skills and applications you may find very helpful to use in your ham shack:

Alexa, what Time is it or simply: Alexa time

Alexa, what time is it in Mexico City — or any location of which you want the time

Alexa, what is the weather or simply Alexa weather

Alexa, what is the weather in Brisbane Australia — or any other QTH in which you want the weather

Alexa, what is the temperature or simply Alexa temperature

Alexa, what is the temperature in Key West — or any other QTH you request

Alexa, what is xx Fahrenheit in Celsius
(Note: great when in a QSO with stations using the metric system and you want to give them your temperature in Celsius instead of Fahrenheit)

Alexa, what is the 7 day forecast

Alexa, what is the 7 day forecast for Montpelier Vermont — or any other QTH you request

Alexa, open Weather Sky
(Note: this will give you a very in-depth weather report and forecast for your area, more than just asking for the weather in the previous commands)

Alexa open Weather Sky for Key West, Florida — or for any other QTH for which you want an in-dept weather report and forecast

Alexa, set a 10 minute timer
(Note: this is good for creating a station ID reminder)

Alexa, how many dollars are in 85 pounds
(Note: want to purchase an antenna from the UK where the price is in pounds? Use this quick conversion! This conversion works for many other currencies as well)

Alexa, what is xxx divided by yyy
(e.g. what is 468 divided by 3.8 to determine the length of a 75 m dipole)

Alexa, what is the distance between Bowling Green Kentucky and Quito Ecuador — or whatever qth you ask for

Alexa, how do you spell heterodyne — or whatever word you ask for
(Note: even though I am a Ph.D., I am a terrible speller and use this skill frequently)

Alexa, ask call sign who is K8HSY — or whatever call you want to know
(Note: often you have to use phonetics; I suggest using proper phonetics, e.g. kilo 8 Hotel Sierra Yankee)

Alexa, ask QRZ who is W7GPF — or whatever call you want
(Note: often you have to use phonetics; I suggest using proper phonetics, e.g. Whiskey 7 Golf Papa Foxtrot)

Alexa, ask ham look-up who is K8OEY — or whatever call you want
(Note: often you have to use phonetics; I suggest using proper phonetics, e.g. Kilo 8 Oscar Echo Yankee)

Alexa, Propagation report

Alexa, ask our ionosphere what are the current band conditions

Alexa, open space weather

Alexa, what time will the sun sit tomorrow

Note: great for gray line anticipation for DX

Alexa, what time will the sun rise tomorrow

Note: great for gray line anticipation for DX

Alexa, create a reminder to meet Tom for a schedule at 9 am Saturday morning — or any other reminder you need

Alexa, create a reminder to get on the Kentucky Phone Net every day at 5 pm in the afternoon — or any other everyday reminder you might need

Alexa, play the latest Ham Nation podcast — or any number of other ham-related podcasts

Alexa, use APRS and locate kilo 4 uniform lima echo

Note; works only for stations using the APRS system when you ask

Alexa, start extra ham cram

Note: gives you 7 different questions from the extra class pool to answer each time you execute the skill; good for exam prep. See how well you do!

Alexa, Open Amateur Radio test

Note: gives you several questions from the test pool to answer for fun or as a test prep

Alexa, Open Amateur Radio General Class Study

Alexa, Ask Ham Exam for a Question

Alexa, Open Ham Radio Facts

Note: gives you a different ham related fact each time you open it

Alexa, Open Q-code

Note: gives you a different Q-code each time you open it

Undoubtedly, I left a few out. There are new skills and applications becoming available about everyday; so many that it is impossible to keep up. If you know of any I left out that you use in your ham shack, please let me know. I am trying to maintain a reasonably complete file of ham shack useful skills and applications.


Dr. Ron Milliman is a special contributor to AmateurRadio.com and writes from Kentucky, USA. Contact him at [email protected].

Weekly Propagation Summary – 2018 Jan 29 16:10 UTC

Weekly Propagation Summary (2018 Jan 29 16:10 UTC)

Here is this week’s space weather and geophysical report, issued 2018 Jan 29 0117 UTC.

Highlights of Solar and Geomagnetic Activity 22 – 28 January 2018

Solar activity was at very low levels. The largest event of the period was a B9 flare from plage Region 2696 (S13, L=123). No Earth-directed CMEs were observed.

No proton events were observed at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit was at normal levels on 22-25 Jan and moderate levels from 26-28 Jan. A maximum flux of 348 pfu was observed at 27/2010 UTC.

Geomagnetic field activity was at predominately quiet to unsettled levels with an isolated active interval observed late on 24 Jan. Quiet to unsettled periods were observed on 22 Jan and 24-26 Jan due to a pair of weak negative polarity CH HSS. Quiet levels were observed on 23 Jan and 27- 28 Jan.

Forecast of Solar and Geomagnetic Activity 29 January – 24 February 2018

Solar activity is expected to be at very low levels throughout the outlook period.

No proton events are expected at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit is expected to be at normal to moderate levels throughout the outlook period.

Geomagnetic field activity is expected to be at quiet to unsettled levels on 29-31 Jan, 04-05 Feb, 09-11 Feb, 15-18 Feb and 20-22 Feb, with isolated active periods likely on 10 Feb. This activity is due to influence from recurrent CH HSSs. Mostly quiet conditions are expected for the remainder of the outlook period.

Don’t forget to visit our live space weather and radio propagation web site, at: http://SunSpotWatch.com/

Live Aurora mapping is at http://aurora.sunspotwatch.com/

If you are on Twitter, please follow these two users: 1. https://Twitter.com/NW7US 2. https://Twitter.com/hfradiospacewx

Check out the stunning view of our Sun in action, as seen during the last five years with the Solar Dynamics Observatory (SDO): https://www.youtube.com/watch?v=zXN-MdoGM9g

= = = = =

BOOK SALE: Space Weather and Sun Science – get these from Amazon, and help us stay online!

NOTICE: When you buy this (or any item after starting with this link), you are helping us keep our SunSpotWatch.com and other resources “on the air” (up and running!). In other words, you are helping the entire community. So, check out this book:

Here is the link to Amazon: http://g.nw7us.us/fbssw-aSWSC

We’re on Facebook: http://NW7US.us/swhfr


Visit, subscribe: NW7US Radio Communications and Propagation YouTube Channel

Before transistors there were TUBES

Oh Boy, what have I gotten myself into

TUBES

A few months after re-entering the hobby in 2015 I picked up a TenTec Century/21.  It has been one of my favorite radios to operate and it is the most aesthetically pleasing radio I own.  After working with it's older (circa 1977) discrete transistorized technology and debugging some of it's problems, I became interested in building kits to learn about electronics.  I built a number of radio kits from different sources and some of the mini-module kits from Elecraft.

But I kept wondering about tube radios.  I came to the hobby well past the tube radio era and although I've read a lot about valve technology I didn't have any first hand experience.  I kept watching auctions for old Heathkits and Military radios and even bid on a few but lost the bids.

This past Christmas I decided that in 2018 I'd do something about this lingering interest.  I knew I'd eventually want to operate one mobile because, well that would certainly make it harder.  The power requirements of tubes are orders of magnitude greater than the QRP transistorized rigs I'd purchased.  Not knowing what I was doing I figured I could re-work an old Heathkit HP-13 power supply to give me what I'd need for an old military radio like the GRC-9.  

Heathkit HP-13a

Unsurprisingly, I was the only bidder and got one for $30 along with the odd grove power connectors that it uses. But I didn't do my research, and soon learned that the magic for these high voltage power supplies lies in the very specific design of their transformers.  In the case of the HP-13 it is operated much like an old military vibrator power supply with two germanium transistors acting as the vibrator.  Current is applied to to the core until it saturates and then a specific voltage determined by the number of turns is generated, the saturation drops the current to that winding and it starts over with the other transistor and the other winding.  I couldn't easily, or practically lower the 800v high voltage down to 580v required by the military radio I wanted and even the low voltage windings produce 300v and 250v respectively which is far beyond the 105v needed by the military radio.

I was warned off actually purchasing a military vibrator power supply due to a number of issues so I decided I'd start out with the radio this supply was designed for, a Heathkit HW-101.  All the electrolytic capacitors have to be replaced, and I plan to replace the diodes to be on the safe side as well.  I'm hoping the old transistors are still serviceable as I can't find any information on direct replacements for those.  I've ordered the replacement caps, diodes and resistors so I'll see how my refurb of this old power supply works out.  Working with voltages that can kill me is a bit daunting and I'm being very careful with the limited power-up tests I've performed so far.

Heathkit HW-101


That brings me to the newest arrival.  If you read my blog you know I like to do photography and it's no fun to photograph ugly radios so I kept watching auctions for HW-101s that were in good cosmetic condition.  I knew I'd have to do a good bit of refurbishment on whatever I ended up with but at least I could start with a "looker".

Heathkit HW-101
I plan, of course, to use it primarily for CW.  I'm aware that this radio is NOT particularly pleasant for CW due to the clacking relay as well as the poor filtering, but I've gotten accustomed to hearing lots of CW stations at once while working with my Century/21 so I think I can adapt.  All my other radios have full break-in so this will be a challenge to deal with, but I'm up to seeing what it was like for old time hams.

Crystal filter
While it has a crystal filter, 6dB of filtering at 400Hz will not offer much rejection to the out of band signals.  I guess I'll see. 

Admittedly this is far from QRP radio but I will endeavor to operate mobile at least a few times just for the experience.  I plan to operate at QRP levels to the extent I'm able.  There's just so much for me to learn.

If I don't maim myself or burn my house down, be on the lookout for posts as I resurrect the power supply and the old girl and get it on the air.  I have some ideas for photography involving glowing tubes that I think will be fun to figure out.  My bigger challenge is that I have no room for this thing at my operating position, so I'm trying to figure that out as well.

So drop me a line if you have restoration experience with these rigs.  Of course I'm reading what I can and look forward to learning how to align the transmit tubes and all the things I've had absolutely no experience with in the world of transistorized radios.


That's all for now

So warm up your tubes and raise your expectations

72/73
Richard AA4OO

Richard Carpenter, AA4OO, is a regular contributor to AmateurRadio.com and writes from North Carolina, USA. Contact him at [email protected].

Amateur Radio Weekly – Issue 191

AO-92 commissioned, open for Amateur use
Initially, the U/v FM transponder will be open continuously for a period of one week. After the first week, operations will be scheduled among the U/v FM transponder, L-Band Downshifter, Virginia Tech Camera, and the University of Iowa’s High Energy Radiation CubeSat Instrument (HERCI).
AMSAT

Blinded by the light: The solar panel tariff
There are a few things off grid amateur radio operators need to know about the solar panel tariff.
Off Grid Ham

PicSat requests Ham Radio assistance to capture telemetry
The CubeSat PicSat carrying an amateur radio FM transponder was launched on the same PSLV-C40 flight from India that delivered AO-92 to orbit.
AMSAT UK

A better antenna for dualband handhelds
Recently, I wondered how well the antenna is really performing so I did a side-by-side comparison with the Smiley 2m halfwave.
AmateurRadio.com

Massive 78-year-old transmitter for sale
A piece of radio history could be yours for $5,000. A 1940 RCA 50 kW shortwave transmitter, located at the decommissioned Radio Canada International Site in Sackville, is up for sale.
CBC

A grave threat to GPS
In the coming months, the U.S. Federal Communications Commission (FCC) may allow high-powered, ground-based, communication transmitters to broadcast at a frequency near GPS L1.
GPS World

Visualizing satellite doppler shift
Doppler Shift is experienced as the satellite (wave source) is moving relative to you, the observer (or receiver) of the transmitted wavelength.
N1AAE

Do shortwave ‘Numbers Stations’ really instruct spies?
Today, numbers stations remain a reality on shortwave radio, even in the Internet Age.
Radio World

Video

Pre-planning for the ARRL VHF Contest
KB1HQS

Indoor attic dipole antenna
Trying out an antenna for Ham Radio in the attic.
K5ACL


Amateur Radio Weekly is curated by Cale Mooth K4HCK. Sign up free to receive ham radio's most relevant news, projects, technology and events by e-mail each week at http://www.hamweekly.com.

LHS Episode #205: The Weekender II

Welcome to the another edition of The Weekender version of LHS. In this episode, your hosts discuss, Scotch whisky, cheap wine, JT-65, casseroles with pepperoni and awesome, upcoming contests and special event stations and much more. Thank you for listening.

73 de The LHS Crew


Russ Woodman, K5TUX, co-hosts the Linux in the Ham Shack podcast which is available for download in both MP3 and OGG audio format. Contact him at [email protected].

TX factor Episode 20 is Now On Air

Welcome to our 20th episode! In this revamped show we conclude our look at innovative amateur radio products from UK National Hamfest 2017, and Bob goes back to basics with an overview of setting up an inexpensive SDR dongle. We have two great prizes to give away in our free-to-enter draw. An RSP1A SDR receiver from SDRplay and a copy of the best-selling book ‘SDR’ from the RSGB. Plus we look back at the past four years of topics covered by the TX Factor team. We hope you enjoy it!

twww.xfactor.co.uk


Nick Bennett 2EØFGQ co-hosts TX Factor with Bob McCreadie GØFGX and Mike Marsh G1IAR. Contact the team at [email protected]

Subscribe FREE to AmateurRadio.com's
Amateur Radio Newsletter

 
We never share your e-mail address.


Do you like to write?
Interesting project to share?
Helpful tips and ideas for other hams?

Submit an article and we will review it for publication on AmateurRadio.com!

Have a ham radio product or service?
Consider advertising on our site.

Are you a reporter covering ham radio?
Find ham radio experts for your story.

How to Set Up a Ham Radio Blog
Get started in less than 15 minutes!


  • Matt W1MST, Managing Editor




Sign up for our free
Amateur Radio Newsletter

Enter your e-mail address: