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Tommy follows up on a previous short and shows us why and how we should replace damaged battery wraps on reclaimed 18650 batteries.

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Hello and welcome to the 420th installment of Linux in the Ham Shack. Smoke 'em if you got 'em! In this episode the hosts discuss Youths on the Air 2021, the FCC and 5cm, the reopening of ARRL HQ, satellites made of plywood, the Linux 5.13 kernel, a new version of Mixxx and much more. We hope you enjoy this episode and have a great week.

73 de The LHS Crew

In this episode, Martin (M1MRB) is joined by Chris Howard (M0TCH), Ed Durrant (DD5LP) and Frank Howell (K4FMH) to discuss the latest Amateur / Ham Radio news. Colin (M6BOY) rounds up the news in brief and this episode's feature - 8 Watt Handie Talkie.

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We would like to thank Philip Heckingbottom VK6ADF and Dave Renton G1DUM and our monthly and annual subscription donors for keeping the podcast advert free. To donate, please visit - http://www.icqpodcast.com/donate

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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 fun. 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

Hello and welcome to the 418th installment of Linux in the Ham Shack. In this episode, we talk to part of the team from Amateur Radio Digital Communications, a group that emerged from the AMPRNet. We find out how the group was formed, the popular grant program for amateur radio projects it has created, its available resources and much more. Thank you for listening. We hope you enjoy this episode and have a great week.

73 de The LHS Crew

Field Day was an experiment this year. I ran my operation for nine hours using a 5V 18650 battery. I made 200 QSOs before calling it quits.

I operated on the deck with an MTR 4-B designed by KD1JV. The antenna was an 88 foot doublet up about 45 feet. I used the ZM-2 tuner. For power I used the Powerfilm Lightsaver. This is a 5 watt roll-up solar panel that charges a 3.7V 18650 battery rated at 3.2 Ahr. The battery inside the Powerfilm product is commonly used in flashlights. The combination of the rig and the power supply is crucial.

The MTR rigs will operate from 6 to 12 volts. The Powerfilm puts out 5V to a USB socket. The secret ingredient required to bring the USB voltage up to the operating voltage of the rig is a Baofeng USB charging dongle. This device takes a 5V input and outputs 10.3 volts… perfect for the MTR transceiver. With this voltage the MTR puts out a little less than 3 watts.

The Powerfilm Lightsaver is designed to charge cell phones for hikers and campers. It weighs only about 5 oz. and rolls up into a tiny package. Any USB 5V cell phone charging battery could be used with the Baofeng dongle.

This year my whole station operated on 5V. I used a Samsung tablet for logging.

In New Hampshire it was cloudy for most of Field Day, but fortunately the amorphous solar panel provides some charging even when it’s cloudy. I’m guessing that after 9 hours of operating the battery was down to about half capacity. The beauty of this system is that one could operate indefinitely with moderate sunshine.

I’ve been experimenting with this setup during hikes and bike rides for the last couple of months with a view to using it for Field Day. This year’s emergency exercise proves that it is viable for an extended grid-down power outage.

Ham College episode 78 is now available for download.

Extra Class Exam Questions – Part 16.
E4B Measurement technique and limitations: instrument accuracy and performance limitations, probes, techniques to minimize errors, measurement of Q, instrument calibration, S parameters, vector network analyzers.
54:43

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