"John" <johnk5mo@...> writes: Because of this, I avoid lithium ion batteries. When I do use them, I only charge them while I am around, and I have careful to avoid mechanical damage. I would

That's pretty interesting - have you had good luck with it? And yes, I would have to tune it with an analyzer - LOL. No way I'd want to be close enough to touch those knobs with real RF going through

Yeah, I knew you guys were joking. And I have spoken with the MFR. The major "danger" is not that it will fail but more that the electrical "interference" will screw up the programming. I'm on my 2nd

I use the Bioenno batteries from the 3a up to 12A. I love that they are 13.8V John VE3IPS Ham Radio is a lifestyle not a Hobby! Take the radio outside and operate from the Field

30 AH is way overkill for a QRP rig (the 706, which i have too, is NOT thrifty with power). An efficient QRP rig will run 4 hours off a 7AH gel cell without any problem at all. The other

Based on what I'm seeing here about battery life it's time for me to get some new batteries. I have only done 2 portable operations in the past few years with my Hilltopper 20 and Black and Decker

Nice Thread, I would also have to say, RF Circuit Design by Bowick is in my top 3. Here are my top 8: RF Circuit Design: Bowick, ISBN# 0-672-21868-2 (this is my first one I picked up in 1986) RF

Thank you,Jeff. We were in CA visiting our daughter, so missed the January SSS. It appears that condx were really awful. I'll try to add some excitement to February's event. Hope to BCNU

Hey John, I was actually just joking with you, but your point even though humorous was well spoken. Thanks for thinking of those of us who are getting older and have such accessories as pacemakers

I like RF Circuit Design by Christopher Bowick. He includes design exercises to go along with the theory. There are a couple of the same title so make sure to also look for the author. 72 John kc9on

Larry, we enjoy the effort that's put in to benefit the QRP world by all of the organizers and it's all way too much fun even if contacts are minimal. Thanks for what you do, John Skeeter 38

I'm lovin' the logo that's in the top of that ammo box! Just sayin'. Larry W2LJ

For an Argonaut IV or KX2, a 30Ah battery will last a couple of weeks! For an afternoon's operating, see what other folks who are running QRP on this thread have mentioned. I have an old Hawker

I'm sorry. I didn't intend to be morbid. My point was that, to be safe, the person with a pacemaker should check with the manufacturer of his device as well as with his doctor.

In terms of battery technologies disregarding cost I'd rank them: 1. LiFePO4 (Bioenno, Dakota Lithium) 2. LiPo 3. NiCd 4. Sealed Lead Acid You can use this calculator to estimate your battery

That's an interesting pack.   Is it correct that all voltage output can be used simultaneously (albeit with decreased battery life)? Also I wonder if you think the mAH capacity (i.e. 8300mAH at 12

For SOTA activations I use an A123 4S1P LiFePO4 to power my KX3 which provides 13.2 V @ 2.5 Ah. Expensive but small and light weight. This chemistry holds a level voltage for a long time and then

Impressive. 73 de n4mj//glenn “PLEASE REMOVE all email addresses before you send it on and use BCC option when forwarding" Thank you!

Richard, The Gel Cell 7ah is sort of heavy so I decided to use it to hold stuff together when the wind blows. My rig is in a plastic ammo box with the battery on the bottom when operating. Complete

Richard, Any lead acid or gel cell battery will be affordable but heavy. I use a group 24 lead acid deep cycle battery that is more than enough for what you want to do but weighs almost 30