ICQ Podcast Episode 259 – RF Safety

In this episode,  Martin M1MRB is joined by, Leslie Butterfield G0CIB, Matthew Nassau M0NJX, and Bill Barnes N3JIX  to discuss the latest Amateur / Ham Radio news. Colin M6BOY rounds up the news in brief, and this episode’s feature is RF Safety by Bill Barnes (N3JIX).

We would like to thank our monthly and annual subscription donors for keeping the podcast advert free. To donate, please visit - http://www.icqpodcast.com/donate

  • SSTV on a Baofeng?
  • New BT broadband service to transmit across VHF
  • Updates Iceland Radio Regulation
  • AO-92 Commissioned and Open for Amateur Use
  • New Zealand get 5 MHz (60m)
  • Signal From 'Dead' NASA Satellite
  • InnovAntennas Releases 4/2m Dualbander
  • 20m WSPR Balloon Travels the World
  • WIA Want Power Increase

Colin Butler, M6BOY, is the host of the ICQ Podcast, a weekly radio show about Amateur Radio. Contact him at [email protected].

Retirement planning time!

Time to start planning for retirement, if you say it fast the end of 2019 is not that far off and that is my official retirement date! As the old saying goes and it's so true "Where did the time go?". I will be 59 at the time of retirement and with good health I should be enjoying this next phase of my journey for some time. So where does ham radio fit into my plans? I could say that once retired I will have all the time in the world for radio......BUT........I have been off for extended holiday periods and at that time I thought I had all the time in the world. It seems even when not working you can still become very busy and radio gets crowed out with other "things" So one of my goals is to make sure I put time aside for radio time.
One of our big retirement plans (as Julie retires the same time I do) is that we are picking up and moving to the UK! We both are citizens of that great country and will be spending our retirement years there and also traveling abroad from our UK home homebase. This brings me back to ham radio again, at this point in Canada I hold an advanced ticket which includes 12 wpm CW. I have been all over the Ofcom (Office Of Comunications) site in the UK looking for information on how my transition regarding my amateur radio licence will be dealt with by Ofcom. Those of you over in the UK reading my blog maybe you can add some insight for me in regards to when I move will my Canadian licence transfer to a UK licence, do I have to start over or a combination of both? I did try my best in going over the Ofcom website but to be honest it is a confusing site.


Mike Weir, VE9KK, is a regular contributor to AmateurRadio.com and writes from New Brunswick, Canada. Contact him at [email protected].

Amateur Radio Weekly – Issue 192

AM Rally this weekend
The purpose of this event is to encourage the use of Amplitude Modulation on the Amateur Radio bands.
AMrally.com

ARRL Grid Chase totals mapped
The IGC Grid Totals map visualizes the number of ARRL Grid Chase QSOs per grid square.
K1WDY

How Amateur Radio played a role in the Hawaii emergency response
While an official retraction from emergency officials of the alert did not come until 38 minutes had elapsed, amateur radio operators were able to confirm within 13 minutes that the Hawaii EAS alert was false.
Radio World

FCC Enforcement: A call to action
In recent months on 40M and 80M, there has been a concern by many Amateur Radio operators regarding certain individual’s operating behavior, specifically on 7.200 MHz and 3.822 MHz.
AmateurRadio.com

ARRL again calls for action on symbol rate limits
Introduced in 1980 the symbol rate restriction has crippled the development of innovative data modes in the United States and amateurs have been trying to get it scrapped for decades.
Southgate

Low-power local radio rises
A knowledge of geography is essential if you are running a tiny, 100-watt radio station. For a low-power FM radio station, anything measurable in miles is good.
New York Times

Inaudible tones in commercials to prevent triggering Alexa
Here’s why Alexa won’t light up during Amazon’s Super Bowl ad.
Bloomberg Technology

Ham turns up undead NASA mission
NASA lost contact with its IMAGE satellite in 2005, but it may still be operating.
Ars Technica

Sticker shock: CW keys cost too much, or do they?
My goodness, straight key manufacturers are gouging us aren’t they?
Ham Radio QRP

Video

Our ARISS contact
How I got involved with a helping a school talk to an astronaut on the ISS.
Space Comms


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.

Noisy power supply — Heathkit HP-13

Resurrecting a Heathkit HP-13

As seen in my previous post I've taken the dark plunge into the world of tube radios.  I want to start restoring my Heathkit HW-101, but before I can do that I must be able to power it.  As I previously wrote, I taken the road less travelled and got an old (circa 1965) HP-13 mobile power supply because I thought it would be nice to power the radio from a 12v source rather than mains. 

Unrestored HP-13 with broken solder joints and trashed capacitors


Well there seems to be a reason these don't seem very popular... I'll get to that.

I found a very nice article from RDF-Electronics regarding modernizing the HP-13 power supply.  That document includes the components and part numbers for everything you will need to restore your HP-13.  My parts arrived from Digi-key and I began snipping and desoldering the old component off the PC board.  The replacement electrolytic capacitors are all much smaller and have radial rather than axial leads.  That makes placing things on the board require a bit more creativity.  

HP-13 Schematic

The only truly problematic components to replace was replacing the twin positive axial lead electrolytic (C11) with two electrolytic capacitors (space issue) and replacing the C1 and C12 due to the tricky wiring around the transistors. 

The orange cap on the left under the Q1 (C1) was tough to replace with a much smaller radial lead capacitor

The article suggested replacing the original 100 uF/50 V capacitor with a 4,700 uF/35V to better control ripple.  The article goes into quite a bit of detail concerning his testing of ripple using an oscilloscope.  Finding room for that big cap and it's accompanying filter disc required a bit of creativity as seen below, where it's laying on its side between two of the rectifier caps.

I will glue all the caps to the board before I put the power supply into service.



New capacitors and diodes

I replaced all the electrolytic caps and diodes.  The diodes might have been ok but they are blocking over 300 volts each and a single failure would let the smoke out for sure.

Out with the old

In with the new
All the resistors except one 100k 2 watt were ok.  So I only replaced that resistor.  The 1.6kv disc caps even measured ok.

The internals look a bit different now with the new caps standing up where the old, larger axial lead components laid flat.

Ready for testing

Testing

After performing resistance and continuity checks I buttoned it up for the test.

The Noise

I had no idea how audibly noisy this power supply would be.  The switching that occurs in the transformer creates a very loud whine.  I understand why hams would install these in the trunk.  There's no way you'd be able to stand this for long if it was sitting next to your station.

I have a longish intro in the video.  Skip towards the end to hear it powered up... turn your volume down when you see the "hearing protection" sign come up in the video.


Conclusions

This was a good learning experience.  I learned about high voltage transformers and got some practice restoring older equipment.  I practiced electrical safety and didn't kill myself, so I'm pleased about that.

I now have a power supply I could use from a sturdy 12v source if I needed it, BUT due to the noise in operation I'm going to look into restoring a HP-23 which runs off house mains (AC) and is mostly silent. 

I'll keep this on the shelf waiting for a day that I need to run the HW-101 mobile. 


That's all for now

73
Richard AA4OO

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

ETH096 – School Club Roundup, Hamvention Update and More…Everything Ham Radio

Hello everybody! In this episode of the Everything Ham Radio Podcast, I am stuck by myself talk to yall. I unfortunately didn’t remember that I my next scheduled update was due until 4pm the day before. So I worked all afternoon, while at work, trying to figure out what I was going to talk about. When I got off work at midnight, I ran home and did my couple honey-dos and then went straight to recording the episode.

So what is in this episode?

First off, I made a mistake! Yea, I know, nobody is suppose to make mistakes right? Well, in my last episode I did. In last episode, my semi regular co-host Ian KM4IK and were talking about the big stink that was doing on with some things that the ARRL Board of Directors were going to be voting on. Neither one of us were really up to speed on the whole thing as much as we should be, but we did our best, and we even said that we weren’t. However, after the episode I did receive multiple emails saying that I said something wrong, so I corrected it in this episode.

With that out of the way, I went on to talk about an upcoming event called the School Club Roundup. It is this month only a few days away actually. The event run February 12-16, 2018. It is an event that is geared for school amateur radio clubs to get on the air and make some contacts. Even if you are not in a school club though you can still get on the air and make contact with the school clubs that are on the air and help them make the points.

After that, I moved on to Hamvention. Another correction from last episode. Well I say correction, this time it wasn’t me though. In last episode we talked about how a new building was going to be built and available by this Hamvention. However, this week, the Hamvention committee released that it wouldn’t be started on until later in the year due to a material shortage.

I wrap up the episode reading some emails that I have received over the past few weeks. The last episode of 2017, I told yall what my plans were for 2018 and asked what some of yalls were and also asked some questions about what were yalls opinions on how my show is. I got a few responses, wish I would’ve had more though.

Until Next Time Yall…

73 de Curtis, K5CLM


Curtis Mohr, K5CLM, is the author/owner of Everything Ham Radio Blog and Youtube channel. Contact him at [email protected].

The Spectrum Monitor — February, 2018

Stories you’ll find in our February, 2018 issue:

The Powerful Voice of Radio Miami International
By Richard Fisher KI6SN

The Miami-based shortwave radio station known as WRMI began as a one-transmitter, one-antenna operation focusing mostly on Latin America. Then, late in 2013, an extraordinary opportunity came to WRMI’s door. Former shortwave broadcasting giant, Family Radio WYFR, was selling its massive antenna farm covering one square mile of ranch land near Kissimmee, Florida. The move turned WRMI overnight into a worldwide voice with 14 transmitters and 23 antennas.

TSM Reviews: DMR and the Radioddity GD-77
By Cory GB Sickles WA3UVV

Digital Mobile Radio (DMR) first came on the scene in the mid-2000s. But, price was always a barrier that stopped many from getting in on this amateur radio revolution. Recently, though, newer players moved into the market and prices began to fall. When Cory first heard about the Radioddity GD-77 he had low expectations. However, last fall they were running a Halloween special, with a 15 percent discount if you bought two, and that was enough to send him to his wallet. Now, he’s happy he did. Find out why Cory believes “Radioddity has a winning radio on the market.”

TSM Reviews: Exploring the Video and Radio Possibilities of Roku
By Mike Kohl

Over-the-Top (OTT) is the term the broadcast industry gives to “cord-cutting,” the wave of former cable and satellite-TV subscribers who are opting to bypass the fee structure of pay-TV in the US. OTT usually requires the use of a fairly robust Internet connection and at least one of many popular streaming devices. None are more popular that the long running and relatively inexpensive Roku devices. Mike takes a look at the possibilities for streaming not just video channels but radio as well for those seeking to maximize their cord-cutting experience in this first of a two-part series.

TSM Reviews: QRPWorks SideKar Plus
By Mark Haverstock K8MSH

Being a recent convert to QRP operation, Mark has been looking at radios and accessories that he can put into a small go-kit for portable operations and something easily taken on trips. Whether it’s hiking to a location off the grid or packing luggage for a flight—lightweight and portable are at the top of the list. Like many hams, with propagation conditions declining, Mark finds himself devoting more time operating in digital modes and relearning CW. Mark found that, mong its many talents, the QRPWorks SideKar Plus sends CW, RTTY or PSK using the keyboard or paddle; has a built‑in logger for 1,000 QSOs and weighs just 9 ounces.

NASWA’s 31st annual Winter SWL Fest and WWLG Update
By John Figliozzi

The 31st annual North American Shortwave Association (NASWA) Winter SWL Fest will be held next month in Plymouth Meeting, Pennsylvania. John Figliozzi, author of The Worldwide Listening Guide, previews the wide range of topics that will be featured this year. Among the programs will be an exclusive screening of “Spectres of Shortwave,” a film by Amanda Dawn Christie centered around the former RCI shortwave transmitter facility at Sackville, New Brunskwick. John also updates his shortwave guide.

Scanning America
By Dan Veeneman
Digital Overtakes Analog

Federal Wavelengths
By Chris Parris
Using Lessons Learned

Milcom
By Larry Van Horn N5FPW
Intro to Military Monitoring: A Look at the New 225-400 MHz UHF Milcom Band

Utility Planet
By Hugh Stegman NV6H
The Great NAVTEX War of 2018

Shortwave Utility Logs
Compiled by Hugh Stegman and Mike Chace-Ortiz

VHF and Above
By Joe Lynch N6CL
2017: A Momentous Year for ARISS

Digitally Speaking
By Cory Sickles WA3UVV
Mid-Winter Potpourri

Amateur Radio Insights
By Kirk Kleinschmidt NT0Z
Did Joe Taylor K1JT, Destroy Amateur Radio?

Radio 101
By Ken Reitz KS4ZR
Narrowcasting: FTA Satellite-TV and Lesser Known TV Channels

Radio Propagation
By Tomas Hood NW7US
Solar Wind and Funnel Clouds

World of Shortwave Listening
By Andrew Yoder
AM and FM Pirates in the Western Hemisphere

The Shortwave Listener
By Fred Waterer
Korean Winter Olympics; Latin and other Languages on Shortwave

Amateur Radio Astronomy
By Stan Nelson KB5VL
Learning about Radio Astronomy

The Longwave Zone
By Kevin O’Hern Carey WB2QMY
Loggings Galore!

Adventures in Radio Restorations
By Rich Post KB8TAD
Invasion of the Two-Band Transoceanic Clones: Whodunit?

Antenna Connections
By Dan Farber AC0LW
Wire Antennas Part Two: More About Dipoles and Other Creatures

The Spectrum Monitor is available in PDF format which can be read on any desktop, laptop, iPad®, Kindle® Fire, or other device capable of opening a PDF file. Annual subscription is $24. Individual monthly issues are available for $3 each.


Ken Reitz, KS4ZR, is publisher and managing editor of The Spectrum Monitor. Contact him at [email protected].

Ham College 37

Ham College episode 37 is now available for download.

General Amateur Radio Exam part 8. CW Operations, Q-Codes, Inductors, Transformers.
01:06:20

Download
YouTube


George Thomas, W5JDX, is co-host of AmateurLogic.TV, an original amateur radio video program hosted by George Thomas (W5JDX), Tommy Martin (N5ZNO), Peter Berrett (VK3PB), and Emile Diodene (KE5QKR). Contact him at [email protected].

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