|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.|
|13:00||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”|
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.
|39:06||Comparison to Nickel-metal Hydride (NiMH)|
|40:42||Disadvantages: higher cost, toxicity, memory effect, and a negative temperature coefficient. Nicad cells are typically 1.2V, while alkaline cells are 1.5V.|
|45:11||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.|
|56:07||Song||“Welfare Blues” by Kirk Fletcher, from the album “Shades of Blue”|
|58:25||Conclusion||Email Richard at firstname.lastname@example.org
KB5JBV on D-Star via port C on the NE5R repeater.
Opening theme music is “Give It All Away”, by midliFeCrisis, from the album “Live from the Loft” available at http://www.podsafeaudio.com
Closing theme music is “We Gotta Go” by David Henderson at Podsafe Audio.