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LHS Episode #396: M17 Deep Dive

Hello and welcome to the 396th installment of Linux in the Ham Shack. In this episode we interview Steve Miller, KC1AWV, one of the major contributors to the M17 amateur …

RRA EP 30 Embarrassing Ham Nets

Embarrassing Ham Nets

Hello everybody, first I would like to apologize for the amount of time it has been since the last RRA. I recently found myself in the hospital and have been having to spend a tremendous amount of time recuperating but we are hoping to get the show back on track so that you can hear my melodious voice regularly.

We recently did a live recording on the Resonant Frequency Discord server and we would like everybody to join us for future recording sessions click this link and it will take you right over there. Do the verification and and you will be ready to go. The server is located at

This time I wanted to talk a few minutes about something I found very disturbing recently. That is to say “What The Hell Has Happened To Amateur Radio Nets?”

I am not talking about the old and well established nets but the new and improved idiotic ragchew sessions that are being spoon fed to the new operators because they don’t know any better. Listen a bit and form your own opinion.

Glossary – See Glossary for terms used on the show.

Resonant Frequency EP 30 Deep Cycle

Resonant Frequency EP 29 Deep Cycle

Opening them: 00:00

Intro: 00:53 We survived Christmas and New Year’s.

Feedback: 01:36 No email since last time.

Donations: 01:54 No donations since last time.

The conversion to digital TV is coming. Are you ready?We made some changes to the website. Check it out.Apologies for the episode being late.Jay W5GM would like your vote for North Texas Section Manager.

Song: 06:48 “Payback Blues” by Dennis Mitchell Band, from the album “Highway Kind of Life”

Buzzword: 09:01 Participation.For many of us, participation is simply talking on the radio during our commute to and from work.Why not take part in a club event? It’s a great way to promote the hobby, and it’s fun!

Song: 13:29 “Harpo-Ventillation” by Mark Hummel, from the album “Mark Hummel’s Blues Harmonica Blowouts”

Topic: 15:12 SLI, Marine and Deep-cycle Batteries

Start, Light and Ignition (SLI) batteries are designed to deliver a lot of energy in a short time, not to deliver steady power over a long time.Marine batteries are a compromise between marine and deep-cycle batteries, and share characteristics of both.A deep-cycle battery is designed to be repeatedly discharged 80% of capacity and can deliver a steady current for a long period of time. 24:55 Testing deep-cycle batteries

27:58 1. Inspect

29:04 2. Recharge

29:24 3. Remove surface charge

30:29 4. Measure the state-of-charge

30:49 5. Load test

32:00 6. Recharge

33:34 Use deep-cycle batteries for the radio shack, in a well-ventilated area

Song: 34:55 “Way Down the River” by Sugarcane Collins, from the album “Way Down the River”, available here:

Conclusion: 38:17

Closing theme:42:00

Glossary – See Glossary for terms used on the show.

Read More About Resonant Frequency: The Amateur Radio Podcast At

LHS Episode #395: It’s a Virtual, Virtual, Virtual, Virtual World

Hello and welcome to Episode 395 of Linux in the Ham Shack. In this short topics episode, we talk with Eric Guth, 4Z1UG, about the upcoming QSO Today expo. We …

Resonant Frequency EP 29 Gel Cell and Lithium Ion

Gel Cell and Lithium Ion and Christmas

Song: 00:00

“Mrs. Santa Claus” by Jingle Punx, from the album “Coal”

Intro: 01:35 Christmas time in North Texas.

Feedback: 02:30

John, M0JFE, likes the show and asks for a show about packet radio.

Thanks, too, to Bill at SolderSmoke for the mention.

Damon, NN7B, listens to both shows, and asks how sealed lead acid batteries compare to nicad and nimh for a grab-n-go kit or mobile station?

Donations: 07:54

Thanks to David, no callsign given, in Pleasonton, CA, andJerry, KD0BIK, of the Practical Amateur Radio Podcast.

08:48 Different music format this time – Christmas music.

10:40 Take a look at the Cafe Press store for Resonant Frequency merchandise.

Click through the Amazon link at our site.

Song: 12:42

“Goin’ On a Date With Santa” by Dr. Elmo, from the album “Up Your Chimney”

Buzzword: 16:16 Superheterodyne, presented by Tim Sutton, KI6BGE.

Song: 22:34 “Don’t Want No Bones for Christmas (I Want An Electric Guitar)” by Paul Austin Kelly, from the album “Don’t Want No Bones for Christmas”,

Topic: 25:54 Batteries: Gel cells and lithium ion.

Gel cells are a type of valve-regulated, lead-acid (VRLA) batteries. They have a pressure-relief valve to allow venting of hydrogen during overcharging, and a gelled electrolyte. Theyhave a greater resistance to extreme temperatures, shock, and vibration than typical wet-cellbatteries like the common car battery.(Contrary to what Richard says, hydrogen is a colorless, odorless gas. The “rotten egg” smellfrom an over-charging car battery is due to the creation of hydrogen sulfide gas, H2S. -Ed.) Lithium Ion batteries.Most of the newer electronics, like laptops, handheld radio, etc., has Lithium ion batteriesdue to their energy to weight ratio, and no memory effect. They also have a low self-dischargerate and are lighter than other types. Their service life depends on the time of manufacture,regardless of number of charge/discharge cycles. The internal resistance is higher than mostof the other chemistries.

Song: 41:44 “Send Me a Wife for Christmas” by Dr. Elmo, from the album “Grandma Got Run Over By A Reindeer”,

Conclusion: 44:42 Listen to Linux in the Ham Shack, too!Happy Holidays!

Closing song: 46:42 “Jingle Bells (Dan the Automator Remix)” by Dean Martin, from the album “Christmas Remixed -Holiday Classics Re-Grooved”

Read More About Resonant Frequency: The Amateur Radio Podcast At

Glossary – See Glossary for terms used on the show.

LHS Episode #394: The Weekender LXVI

It’s time once again for The Weekender. This is our bi-weekly departure into the world of amateur radio contests, open source conventions, special events, listener challenges, hedonism and just plain …

LHS Episode #393: DUDE-Star Deep Dive

Hello and welcome to Episode 393 of Linux in the Ham Shack. In this episode, the hosts interview Doug, AD8DP, the author and primary coder of the DUDE-Star project. This …

Resonant Frequency EP 28 Shocking Ni-Cad

Ni-Cad Battery Deep Dive

Opening Theme
01:02 Introduction
Greetings to the hams working the California forest fires.

03:10 Feedback
Tim, KI6BGE, writes about his first radio, a Yaesu FT-747GX, and his first hand-held, an FT-60R, and other rigs. He also asks about cross-band repeating through the FT-8900R in his car.

Damon, NN7B, says Richard is his ham hero, and also listens to the Linux in the Ham Shack podcast. He was having a problem downloading the first episode, but that should be sorted out now.

Joe, NE2Z, enjoys both podcasts, and made a donation. Thanks, Joe!
Bob, KB3OQY, likes the podcast and learns something new in each episode. He also made a donation.

10:43 Donations
Thanks to Joe NE2Z and Bob KB3OQY for their donations. If you find anything useful in an episode of Resonant Frequency, consider donating a dollar. That’s less than a gallon of gasoline.

Song “Voodoo Queen” by Tommy Dardar, from the album “Blues Fool”

13:55 Buzzword
Memory effect – reality or myth?
If you partially discharge a nickel-cadmium battery (NiCad), and recharge it, it may “remember” that point of discharge as it’s fully discharged state. The best practice is to fully discharge a NiCad battery pack before recharging, and avoid the use of rapid chargers. A related phenomenon is “lazy battery”, where the battery appears to have a full charge, but becomes depleted rapidly when put to use. This is often caused by frequent overcharging, and may be cured by several deep discharge/recharge cycles.

20:29 Song
“Wasn’t That Enough” by Janiva Magness, from the album “Bury Him At The Crossroads”

22:01 Topic
Nicad batteries.
This topic was suggested by several messages on the forums.
The abbreviation NiCad is a registered trademark of SAFT Corporation. Advantages: lower weight, good charging efficiency, smaller variations in terminal voltage during discharge, low internal resistance, non-critical charging condition. In theory, a nicad battery may be charged and discharged up to 1000 times.

Comparison to Nickel-metal Hydride (NiMH)

Disadvantages: higher cost, toxicity, memory effect, and a negative temperature coefficient. Nicad cells are typically 1.2V, while alkaline cells are 1.5V.

Charging. The typical overnight charge, called a C/10 charge, is accomplished by applying 10% of the battery’s total capacity for a period of 14 hours; that is, a 100 mAh battery takes 140 mAh of energy to charge.

Dendritic shorting.

“Welfare Blues” by Kirk Fletcher, from the album “Shades of Blue”

58:25 Conclusion
ail Richard at
KB5JBV on D-Star via port C on the NE5R repeater.

theme music is “Give It All Away”, by midliFeCrisis, from the album “Live from the Loft”

Closing theme music is “We Gotta Go” by David Henderson at Podsafe Audio.

Glossary – See Glossary for terms used on the show.

Read More About Resonant Frequency: The Amateur Radio Podcast At

LHS Episode #392: Display Server Deathmatch

Hello and welcome to the 392nd episode of Linux in the Ham Shack. In this episode, the hosts discuss amateur radio related horror films, an ISS EVA snafu, ham radio …

LHS Episode #391: The Weekender LXV

Hello and welcome to Episode 390 of Linux in the Ham Shack. In this episode, the hosts interview Jason, KM4ACK, the author of the Build-a-Pi shack computer build script. We …