Resonant Frequency EP 28 Shocking Ni-Cad

Ni-Cad Battery Deep Dive 00:00 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. 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" 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.