If voltage is being checked via the K3 display, I believe there is a series
diode before the internal metering that adds a 0.6V drop in TX?
73, Mike AC5P
On Monday, October 26, 2015 5:08 PM, Bill Frantz <fra...@pwpconsult.com>
wrote:
Perhaps it's vanity, but I like running my rig off solar power
and batteries. Since I also take the rig out in the field
somewhat frequently, battery power avoids noisy generators.
(Besides, I own the panels and batteries, but don't own a generator.)
In any case, floating batteries requires a power source during
operations which doesn't work really well with solar power at
night. The WVARA operation discovered during the last California
QSO Party that tired batteries and K3s are a recipe for
transmitter distortion and local interference in a multi-radio
operation. The N8XJK Battery Booster is an attempt to get more
life from tired batteries into the just before dawn hours.
73 Bill AE6JV
On 10/26/15 at 2:18 PM, rmcg...@blomand.net (Bob McGraw - K4TAX) wrote:
>Well my take.....ANYTHING between the power source and radio
>has resistance, regardless of how small. Resistance with any
>amount of current equals voltage drop. Thus E = IR Where E
>is the voltage drop, I is the current and R is the resistance.
>
>I'm not sure what some of those thing are nor why they are
>needed but I do know least is best. As to operating from
>batteries, floating AGM batteries at 13.8 should not produce
>any voltage drop other than the resistance of the power
>cable. Of course a fuse or switch in line does have R so
>there goes the regulation as current changes. Nothing is
>better than a good regulated supply and hopefully one with
>remote voltage sensing. Of course those are more expensive
>and more of a challenge to install and then have operate
>correctly in the presence of a RF field.
>
>73
>Bob, K4TAX
>K3S s.n. 10163
>
>On 10/26/2015 3:55 PM, Bill Frantz wrote:
>>I gave up running my K3 through a RigRunner for just that
>>reason. I put in a short lead directly to the battery bank APP
>>junction strip and things got a lot better. They got even
>>better with a N8XJK Boost Regulator between the K3 and the
>>junction. (Tested with 100W into a dummy load.)
>>
>>73 Bill AE6JV
-----------------------------------------------------------------------
Bill Frantz |The nice thing about standards| Periwinkle
(408)356-8506 |is there are so many to choose| 16345
Englewood Ave
www.pwpconsult.com |from. - Andrew Tanenbaum | Los Gatos,
CA 95032
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