LHS Episode #484: The Weekender XCVII

It's time once again for The Weekender. This is our departure into the world of hedonism, random topic excursions, whimsy and (hopefully) knowledge. Thanks for listening and, if you happen to get a chance, feel free to call us or e-mail and send us some feedback. Tell us how we're doing. We'd love to hear from you.

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].

Recent Crystal Radio DX Group ‘Listening Event’


Crystal Shortwave Receiver of Al Klase (N3FRQ) 
 

The Facebook Crystal Radio DX Group’s fall listening event was held two weekends ago over a two-night listening period. Unlike last year’s event, this was not a contest but rather a leisurely opportunity for members to take some time to see what they could hear with their setups. Also unlike last year, this one introduced and encouraged members to see what they might hear on shortwave! Since circuits losses are measurably much higher as you climb above the broadcast band, audio amplification (AF) was permitted to encourage members to give it a try as this was a whole new region to explore for most of us.

The addition of shortwave inspired much discussion as well as construction, the main objectives of founding the group.

Shortwave crystal radio was all new to me as well and I struggled for several days, right up to the event’s starting time, to even be able to detect a signal. I had chosen to follow a similar path as described in WU2D’s excellent video, using simple link coupling into the detector tank circuit. I reasoned (probably incorrectly) that my end-fed 80m halfwave inverted-V would be close enough to resonating on the 5, 6 and 7 MHz SW bands to provide enough signal into the detector. After playing with this system as well as other antennas for several days, I eventually abandoned the concept and tried a different approach.

I added a loosely coupled tuned antenna input using my 630m inverted-V wire, bypassing its large loading coil and low-impedance matching system. Essentially it was a big vertical long wire tuned against a number of buried ground radials. I also added an LM386 audio stage between the detector and headphones, something I had not tried with the previous system.
 
This simple approach immediately produced signals … just in time for the start of the party at sunset!
 



Obviously, from just the physical appearance of my own SW tuner, there is a vast amount of room for improvement! As crude as it was, the following signals were all heard and verified on a separate SW spotter radio.

Oct 1

0250 10000 WWV Colorado
0255 7365 Radio Marti, Greenville, NC - Spanish
0305 9850 Radio Romania Int'l, Tiganesti, Romania - English
0310 9790 China Radio Int'l (CRI) Quivican, Cuba - English
0315 7375 Radio Romania Int'l, Tiganesti, Romania - English
0320 7335 Radio Marti, Greenville, NC - Spanish
0355 5000 WWV Colorado
0400 5935 WWCR, Nashville, TN - English
0408 5085 WTWW, Lebanon, TN - English
0429 4840 WWCR, Nashville, TN - English
0435 6000 Radio Habana Cuba, Quivican, Cuba - English
1411 6075 China National Radio 1(CNR), Baoji-Sifangshan, PRC - Chinese
1416 5980 Radio New Zealand, Rangitaki, NZ - English
1420 5965 CRI, Xianyang, PRC - Korean
1424 6125 CNR1, Beijing, PRC - Chinese
1426 6175 Voice of China, Beijing - Chinese
1428 7200 National Unity Radio, Tamsui District, Taiwan - Korean
1434 7410 CRI, Jinhua, PRC - Japanese
1436 7395 CRI, Kashi-Saibagh, PRC - Chinese
1437 7365 Voice of China, Shijiazhuang, PRC - Chinese
1452 9410 Voice of America, Tinang, Philippines - Korean
1741 12095 BBC, Kranji, Singapore - Korean
1745 11870 CRI, Urumqi Hutubi, PRC - Russian
2045 15000 WWV, Colorado
2312 11780 Radio Nat'l Amazonia, Brasilia, Brazil - Portuguese
Oct 2
1212 7245 Radio New Zealand, Rangitaki, NZ - English
1214 7310 CNR1, unknown tx site - Chinese
1220 7325 CRI, Jinhua, PRC - Japanese
1230 7355 KNLS, Anchor Point, AK - English
1240 7490 WWCR, Nashville, TN - English
1300 9675 CRI, Shijiazhuang, PRC - Russian
1307 9350 Voice of America, Tinang, Philippines - Korean
1311 9435 Voice of Korea, Kujang, N. Korea - English
1350 9265 WINB, Red Lion, PA - English
1740 9580 KNLS, Anchor Point, AK - Russian
1800 15580 VOA, Selebi-Phikwe, Botsawna - English

Reviewing many of the vintage radio magazines from the late 20s and early 30s, there appears to be very little published material from this era. I found this somewhat surprising but then perhaps not ... maybe most radio-buffs were still entranced by the new regenerative circuits popping-up every month and had little appetite for crystal SW receivers.
 
It would appear that even today there has not been much investigation or experimentation in building an efficient low-loss crystal receiving system for shortwave … somewhat of a golden opportunity for today’s crop of crystal radio builders!

In view of the above, along with a surprising amount of interest in SW during our recent listening event, I’d like to include SW in all future events going forward and possibly encourage even more new interest in developing efficient circuits. Is it practical to consider non-audio amplification for such circuit’s? Time will tell but already, several members are having measured success with just bare headphones!

Some of the BCB and SW construction inspired by the recent listening event is shown below. For more information and more sets, please visit the Facebook Group and consider taking part in our next event, sometime in December ... maybe you can build the perfect SW tuner!


Kasey Jean Double-Tuned Loopstick BCB Tuner


James Kern Double-Tuned BCB Tuner


Ferhat Yavas Shortwave Tuner


Armando Anazco BCB Tuner


Doug Allen (K4LY) Shortwave Tuner

Don Dulmage (VE3LYX) Loop SW Tuner



Doug Allen (K4LY) Shortwave Tuner


Steve McDonald, VE7SL, is a regular contributor to AmateurRadio.com and writes from British Columbia, Canada. Contact him at [email protected].

AmateurLogic 174: 17 Year Anniversary


AmateurLogic.TV Episode 174 is now available for download.

Join the AmateurLogic crew as we celebrate 17 years.
Announcing the winner of the Icom IC-705 portable transceiver and MFJ 8-Band Compact Antenna package. RSP Spectrum Analyzer, Open-Weather on-line satellite image decoder, Irwin Vice Grip Wire Strippers, and a visit from Peter, VK3PB.

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].

Take a Long Hard Look at Our Community… An Editorial by Onno VK6FLAB

This post is to lift up the recent editorial published on eHam.net by Onno VK6FLAB in Australia. His long running podcast, Foundations of Amateur Radio, is one of my favorites. I listen to it every time it drops in my podcast catcher. I’m slowly making my way through the previous 500 episodes. Not one has been disappointing. Onno has recently taken on the scourge of social bullying in our hobby. It affects everyone, not just the bullied.

Once the collective atmosphere of a group, however large or small, has become contaminated by the blind or even oblique tolerance of bullying behavior by even one member of the group, it is there for all to be potentially subjected. The tolerance of bullying will precede new members and succeed former ones. While “bad character” may be the original culprit, the social norms of the group become the active agents of that tolerance of it in the future.

To be clear, our community is a welcoming environment, filled with hope and joy, but there is a small rotten element in our midst that we need to rip out root and branch, much like we would if it was deliberate HF interference.

Onno VK6FLAB on eHam.net

Onno’s essay at eHam.net is available through the link below. I encourage you to read it with an open mind as to your own behavior and those with whom you associate. Being bullied through social media tends to begat your own negative response. I wish I could state that I have never responded in that way. But I cannot. My commitment is to reduce any such behaviors in response to those engaged in bullying of me and to defend those being bullied.

As a professional sociologist who has studied social movements, almost always involving violence, I wish that I could offer a complete answer to the problem. But I do know that Onno is on the right track: tolerance of the problem will only exacerbate it. If you value the amateur radio hobby, it is worth your time and consideration to see what Onno has to say.

To read Onno’s editorial at eHam.net, click HERE.


Frank Howell, K4FMH, is a regular contributor to AmateurRadio.com and writes from Mississippi, USA. Contact him at [email protected].

ICQ Podcast Episode 387 – Three Mini Ham Hardware Reviews

In this episode, we join Martin M1MRB, Dan Romanchik KB6NU, Caryn Eve Murray KD2GUT, Edmund Spicer M0MNG, Ed Durrant DD5LP and Leslie Butterfield G0CIB to discuss the latest Amateur / Ham Radio news. Colin (M6BOY) rounds up the news in brief and in the episode's feature Three mini-reviews.

We would like to thank Jeffery Wilson (VK2JEF) our monthly and annual subscription donors for keeping the podcast advert free. To donate, please visit - http://www.icqpodcast.com/donate

  • New ‘5-Year Rule’ for Deorbiting Satellites to Address Growing Risk of Orbital Debris
  • University Students Learn about Amateur Radio Satellites
  • 16 New Radio Amateurs in Cyprus
  • Radio Science 2.0: Ham Radio Activities for Kids in Romania
  • ITU Elects Ham from US as New Secretary General
  • Swiss Ban on the Sale of Anytone Transceiver (HT)
  • December YOTA Month
  • AMSAT-UK Colloquium Talks to be Live-Streamed
  • RSGB 2022 Convention Livestream

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

Amateur Radio Weekly – Issue 257

Amateur Radio Weekly

Internet Archive looking for Amateur Radio materials
DLARC will be a massive online library of materials and collections related to Amateur Radio and early digital communications.
Internet Archive

Shortwave station WRMI damaged by Ian
Here are photos from the tower farm in Okeechobee.
Radio World

The art and design of Ham Radio
The cards reveal a rich typographic expression that is rare in their authenticity—each card a personal reflection of the stations operator.
Print Magazine

The thorny problem of keeping the Internet’s time
An obscure software system synchronizes the network’s clocks. Who will keep it running?
The New Yorker

Maryland firefighter uses his Ham Radio to send rescuers
Firefighter and Ham Radio hobbyist helped rescue a group stranded by Hurricane Ian.
Fox News

EMCOMM in action
Providing communications support for the Pan Ohio Hope Ride.
OnAllBands

The largest commercial communications array ever has just launched
The problem is, it might outshine all stars and planets.
Cosmos

Bicycle Mobile
I wanted to work HF using my bike as a stand. I won’t ride with the HF antenna installed but rather set it up when I stop.
KK4Z

AntRunner is the satellite antenna mount you need to take with you
The rotator itself is an az-el design with a couple of geared stepper motors.
Hack A Day

Video

Raspberry Pi 4 Vs. Evolve Maestro laptop
Comparing the Raspberry Pi with the Evolve laptop.
KM4ACK

The SHELF-17
Nick M0NTV showcases his latest scratch-built SSB transceiver.
M0NTV Homebrewing

RV HF Antennas
Using nerf bars as an antenna.
David Casler

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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 #483: LHS4EVA

Hello and welcome to the 483rd episode of Linux in the Ham Shack. In this short topics episode, the hosts discuss the upcoming JOTA and JOTI event, an additional period of ARRL club grants, the Internet Archive creating a repository for amateur radio content, a kerfuffle at SQLite, making money with Open Source and much, much more. Thanks for listening and have a great week.

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].

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