Gunny et al:
The issue with power distribution strips for DC is resistance. Every
contact or connection in the path adds some value of resistance. Using
Ohms law, where E = IR, we see that more resistance = more voltage
drop. This includes the resistance of the DC power cable and any
contact arrangements in the path. Ideally, there should be no voltage
change at the radio between receive and transmit.
I have found these power strips may be "rated" for 20 amps, but they
will always add some value of resistance at every contact point. I do
not recommend using any model, brand or make DC power strip to supply
DC to a radio. Thus I always connect the radio direct to the power
supply terminals. I always suggest using proper size ring terminals,
or PowerPole connectors which are properly crimped using a correct
crimping tool. A crimping tool is not pliers or the like, which if
used, I refer to "mash on" connections. I also sweat solder mine after
crimping as well. The crimp plus solder method is not recommended by
the airline industry or NASA. I doubt if my radios will be "flying off
of the desk" or being launched into space any time in my lifetime. HI HI
On DC Cables. Usually #12 AWG wire and a length of 3 ft or less is
suitable for 100 watt radios. If it is necessary to have longer DC
power cables, then I suggest using #10 AWG for lengths of over 3 ft but
less than 10 ft. If you need power cables over 10 ft, I'd consider
changing my installation. The reason is that larger cables are
difficult to use, move, and attach connectors reliably behind a radio.
So to answer you question "is it safe........" yes, but there are better
ways to handle DC power distribution.
Clean and stable DC at the radio is the objective.
73
Bob, K4TAX
On 4/25/2020 9:15 AM, Don Schroder wrote:
Bob,
Is it safe to run my K2 using Anderson Power Pole connections, and/or
RigRunner equipment?
For my info, what is the reason for NOT using them?
I’m rewiring, and I want to do it right!
Gunny, KE0PVQ
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Windows 10
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