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May 11 2010

RFC Show Notes Episode 029

00:00 Opening Theme “Mrs. Santa Claus” by Jingle Punx, from the album “Coal”
01:35 Introduction Christmas time in North Texas.
02:30 Feedback 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?

07:54 Donations Thanks to David, no callsign given, in Pleasonton, CA, and Jerry, KD0BIK, of The Practical Amateur Radio Podcast.
08:48 Different music format this time – Christmas music.
10:48 Take a look at the Cafe Press store for Resonant Frequency merchandise. Click through the Amazon link at our site.
12:42 Song “Goin’ On a Date With Santa” by Dr. Elmo, from the album “Up Your Chimney”
16:16 Buzzword Superheterodyne, presented by Tim Sutton, KI6BGE.
22:34 Song “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”
25:54 Topic 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. They have a greater resistance to extreme temperatures, shock, and vibration than typical wet-cell batteries like the common car battery. (Contrary to what Richard says, hydrogen is a colorless, odorless gas. The “rotten egg” smell from an over-charging car battery is due to the creation of hydrogen sulfide gas, H2S. -Ed.)

36:04 Lithium Ion batteries.

Most of the newer electronics, like laptops, handheld radio, etc., has Lithium ion batteries due to their energy to weight ratio, and no memory effect. They also have a low self-discharge rate 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 most of the other chemistries.

41:44 Song “Send Me a Wife for Christmas” by Dr. Elmo, from the album “Grandma Got Run Over By A Reindeer”
44:42 Conclusion Email Richard at kb5jbv@gmail.com

Twitter: twitter.com/kb5jbv

KB5JBV on D-Star via port C on the NE5R repeater.

Closing theme music is “Jingle Bells (Dan the Automator Remix)” by Dean Martin, from the album “Christmas Remixed – Holiday Classics Re-Grooved”

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