The lightest battery option is non-rechargable Energizer Ultimate Lithium AA batteries. Those are about 4oz for 3000mAh. If you need more that than, carry a second set.
wunder K6WRU On Apr 26, 2013, at 10:54 AM, Mark Goldberg wrote: > I am very big on LiFePO4 battery packs, 4 Genuine A123 cell 2.3 AH > ones to be exact. They start out about 14V and provide about 2 AH till > they get down to 12V when I stop and switch to another one. This > allows full power on the KX3 as the voltage drop is very low even when > transmitting at 12 W. I got packs with a balancing connector and > charge with a balancing charger. > > You also need to consider the weight of a decent feedline, balun and / > or counterpoise that drastically effect transmit efficiency. I created > a go kit with all that and a headset and an extendable pole for an > inverted V support and a hard case for my KX3 that came to about 7 lb. > I set that up on a beach in Maui last week with some success, but had > good success working a contest from my back yard when the other end > were contest stations with good antennas. > > This is my kit > > 20M > Item Oz > Radio With Eneloops 34.4 > Hard Case 10.5 > Battery with Power Cable 12.4 > Headset 6.8 > Balun 6 > Pole 20 Ft usable 15.7 > Antenna wire on looms 2.9 > Extra Antenna Wire for 20M 1.3 > Feed (300 ohm ladr) on loom 12.4 > Base measuring rope on loom 5 > > > Total Oz 107.4 > Total Lb 6.71 > > > I added a 2 lb netbook to all this for logging. I hate dupe sheets. > > Mark > > On Apr 26, 2013 9:40 AM, "Wayne Burdick" <n...@elecraft.com> wrote: >> >> Hi all, >> >> This year I'm going to break with tradition and *not* drag tons of gear to >> my field-day site. I'm going minimal….4 pounds max of radio gear. This will >> allow me to put more emphasis on food, drink, and enjoying time with my son >> (now almost 9). If anyone else is up for "FD4#", let me know. I'd like to >> compare notes on equipment, especially antennas, battery packs, and logging. >> >> 4 pounds (or so) is not an arbitrary number. This allows for: >> >> - a KX3 with internal ATU and attached paddle >> - mic and headphones >> - external Li battery, plus 8 internal AA batteries in the rig as a backup >> - two 50' (roughly) lengths of antenna wire, adapters, and a couple of 1-oz >> weights to get one wire into a tree >> - paper log and dupe sheets (maybe…more on this below) >> - soft carrying case for all of the above (in my case, a Think Tank "Strobe >> Stuff" bag) >> >> I still expect to be reasonably competitive in the 1B-battery category even >> with this lightweight station. I hope to operate on 80-6 meters in CW, SSB, >> and digital modes (RTTY using the CW paddle and the KX3's text decode >> function). >> >> There are two items I'm still working on: >> >> 1. External battery >> >> I need something that will fit into the bottom of the Strobe Stuff bag. It >> should supply at least 11 V, and I'd prefer 4 to 5 AH, though I could get by >> with 3 AH and switch to the internal AAs later if necessary. Has any >> consensus formed about specific Li battery packs in this class? Ideal max >> size would be 1x3x2.5" (HWD). >> >> 2. Logging >> >> I actually like paper logging in the field. It's kind of a Zen thing, >> checking dupe sheets manually (Griffin is old enough to help with this, >> too). But are there any good FD apps for the iPhone? I need the iPhone >> anyway so it doesn't count towards the station weight total. If there's an >> app that's easy to use for this, I'd love to try it. Heck, I'd even pay for >> it. >> >> Wayne >> N6KR >> >> >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:Elecraft@mailman.qth.net >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html -- Walter Underwood wun...@wunderwood.org ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
