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
On 10/26/15 at 12:50 PM, j...@audiosystemsgroup.com (Jim Brown) wrote:
On Mon,10/26/2015 12:37 PM, Bob McGraw - K4TAX wrote:
In fact, anything in line between the power supply and radio can
contribute to this. Even fuses, switches, power connectors and
such. Any connection that is loose or terminal that is loose will
be a voltage drop point. They just add up.
Yes. I've been told that the DC bus in popular DC distribution strips
is quite small considering the rated current. They're fine for
accessories that don't draw much current, but don't run your rig
through them (unless it's QRP)!
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