I just checked my radio. Receive shows 13.7 volts. At 100 watts CW key
down transmit it shows 13.3 volts. The current indicated on the power
supply is 18 amps. Power leads are about 2 ft in length being #10
stranded with connectors crimped and soldered at both ends. Also a #10
AWG ground is in place between the radio and power supply
73
Bob, K4TAX
K3S s/n 10163
On 10/26/2015 2:37 PM, Bob McGraw - K4TAX wrote:
You don't happen to have anything else in line between the power
supply and the K3 do you? I've found those DC distribution panels
sold by certain companies are contributors to significant voltage
drop. Your statement " With the radio connected directly to the PS.
I am now seeing 14.1 VDC and 12.0 VDC on TX." is a clue that the way
you have things configured is not optimum. 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.
My rule: the radio connects direct to the power supply. No
exception. If you need DC for something else, connect it direct to
the power supply as well. I also use a dedicated ground conductor
between the radio and DC supply ground. The DC Negative is not
considered to be adequate ground.
73
Bob, K4TAX
K3S s/n 10163
On 10/26/2015 12:05 PM, Rich wrote:
Thanks to all. I have check my PS and it does not fluctuate even a
tenth of a volt on TX. With the radio connected directly to the
PS. I am now seeing 14.1 VDC and 12.0 VDC on TX. So I need to look
closer at the wire gauge and connectors. That is still about 2VDC drop.
Thanks for the help
rich
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