Re: [Elecraft] My KX3 Battery Approach

2014-07-15 Thread KB9WMJ
- Original Message - From: "John Payne" To: Sent: Monday, July 14, 2014 10:03 AM Subject: Re: [Elecraft] My KX3 Battery Approach Unfortunately, those are NOT AA size cells. 18650 cells are much larger. See <http://happypics.zapto.org/displayimage.php?pid=3026> 73 de W

Re: [Elecraft] My KX3 Battery Approach

2014-07-14 Thread John Payne
Unfortunately, those are NOT AA size cells. 18650 cells are much larger. See 73 de W4CWZ On 7/13/2014 5:58 PM, kb9...@wi.rr.com wrote: Use a better AA battery (3.7V 4.9AH Li-ion): http://www.ebay.com/itm/181411959514 _

Re: [Elecraft] My KX3 Battery Approach

2014-07-13 Thread KB9WMJ
" Cc: Sent: Sunday, July 13, 2014 6:10 PM Subject: Re: [Elecraft] My KX3 Battery Approach The 3.7V rating is its voltage at about 50% state of charge. That type of Li-ion cell has a fully charged voltage of 4.2V. Four of them would be too much for a KX3. Chip Ae5ka On Sunday, July 13, 20

Re: [Elecraft] My KX3 Battery Approach

2014-07-13 Thread Chip Stratton
om/itm/181411959514 > > and battery holder: > http://www.utmfg.com/category/BAT-AA.html > > Use 4 of them for 14.8V. > > Keith > KB9WMJ > > > - Original Message - > From: "hb9brj" > > To: > > Sent: Saturday, July 12, 2014 12:30 PM > Sub

Re: [Elecraft] My KX3 Battery Approach

2014-07-13 Thread KB9WMJ
ubject: Re: [Elecraft] My KX3 Battery Approach Using 8 internal eneloop cells, I measured battery voltage versus current (as shown on the KX3 display) during RX and different TX pwr levels, created an Excel scatter chart and fitted a linear trend line. The result: 1.15 Ohms, R^2 = 0.95. A single eneloo

Re: [Elecraft] My KX3 Battery Approach

2014-07-12 Thread hb9brj
Using 8 internal eneloop cells, I measured battery voltage versus current (as shown on the KX3 display) during RX and different TX pwr levels, created an Excel scatter chart and fitted a linear trend line. The result: 1.15 Ohms, R^2 = 0.95. A single eneloop cell has around 0.035 Ohms of internal r

Re: [Elecraft] My KX3 Battery Approach

2014-07-12 Thread Chip Stratton
The problem I have found with AA cell holders of the 10 cell variety is that there was unacceptable voltage drop under load. I tried this with the KX1 and was not satisfied. I think it will take a pretty high quality cell holder to get around that problem, which resides around the contacts and inte

Re: [Elecraft] My KX3 Battery Approach

2014-07-11 Thread ejkkjh
Mouser has them, the 10 cell. Emory WM3M -Original Message- From: Doug Person via Elecraft Sent: Friday, July 11, 2014 9:01 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] My KX3 Battery Approach You can find the 10-cell on ebay. It does come from China and takes a few weeks

Re: [Elecraft] My KX3 Battery Approach

2014-07-11 Thread Doug Person via Elecraft
eler Sent: Friday, July 11, 2014 14:49 PM To: David Cutter; k...@yahoogroups.com; Elecraft Reflector Subject: Re: [Elecraft] My KX3 Battery Approach Right! The flexibility is good, and I have quite a few Eneloops on hand. Yes, $10 is a bit pricy, David. Those are not exactly what I bought; I just

Re: [Elecraft] My KX3 Battery Approach

2014-07-11 Thread Phil Wheeler
r it is a good idea -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Phil Wheeler Sent: Friday, July 11, 2014 14:49 PM To: David Cutter; k...@yahoogroups.com; Elecraft Reflector Subject: Re: [Elecraft] My KX3 Battery Approach Right! The flexibility is goo

Re: [Elecraft] My KX3 Battery Approach

2014-07-11 Thread Jeff Herr
h.net] On Behalf Of Phil Wheeler Sent: Friday, July 11, 2014 14:49 PM To: David Cutter; k...@yahoogroups.com; Elecraft Reflector Subject: Re: [Elecraft] My KX3 Battery Approach Right! The flexibility is good, and I have quite a few Eneloops on hand. Yes, $10 is a bit pricy, David. Those are no

Re: [Elecraft] My KX3 Battery Approach

2014-07-11 Thread Phil Wheeler
10-aa-battery-box-rk45y 73 David G3UNA - Original Message - From: "Phil Wheeler" To: ; "Elecraft Reflector" Sent: Friday, July 11, 2014 9:04 PM Subject: [Elecraft] My KX3 Battery Approach While I have a 5 Amp-hr Lithium Ion battery and use it, and also high-cap

Re: [Elecraft] My KX3 Battery Approach

2014-07-11 Thread David Cutter
ssage - From: "Phil Wheeler" To: ; "Elecraft Reflector" Sent: Friday, July 11, 2014 9:04 PM Subject: [Elecraft] My KX3 Battery Approach While I have a 5 Amp-hr Lithium Ion battery and use it, and also high-capacity Eneloops inside my KX3 (with the battery charger option) my

[Elecraft] My KX3 Battery Approach

2014-07-11 Thread Phil Wheeler
While I have a 5 Amp-hr Lithium Ion battery and use it, and also high-capacity Eneloops inside my KX3 (with the battery charger option) my preferred approach is to use ten external Eneloops in a battery holder made to hold ten AA cells, this sort of thing: http://www.amazon.com/gp/product/B0