The first rule in troubleshooting is to unplug everything that isn't
absolutely necessary to the equipment being diagnosed.
In this case all that would be needed is power, ant/dummy load and the K3.
Then start plugging things in until you find the offending device.
73 de Brian/K3KO
Ian Kahn - Ham wrote:
So, it looks like I tracked down my low output issue. The problem
appears to be with my West Mountain RigRunner, not my K3. A big "thank
you" to all who offered guidance on getting this thing tested and
troubleshot.
Thank you, 73, es Merry Christmas!
--Ian
Ian Kahn, KM4IK
Roswell, GA EM74ua
km4ik....@gmail.com
K3 #281, P3 #688
HRD v5.x/6.0 Test Team
On 12/24/2012 12:22 PM, Lyle Johnson wrote:
Might not be a 30W drop, but a matter of calibrations of both the
internal wattmeter (there is a menu item to adjust it) and the
external wattmeter.
If the output power is set to 100W and the internal wattmeter is
reporting 100W, then the K3 is happy. If in fact the output power is
only 70 W (double check if the ATU is bypassed or in line, antenna
wiring and chassis connections are tight int he k3 etc), then the K3
wattmeter may need to be calibrated. If that is the case, you need to
go to the menu and adjust it. But only do this if you are CERTAIN
your external wattmeter is in fact accurate. Once you are certain the
K3 wattmeter is reporting within spec, re-run the Tx calibration.
BTW I think a 2V drop is still excessive. Might be long runs or light
gauge wire or ? But that is a separate issue from the wattmeter
accuracy.
73,
Lyle KK7P
It is highly possible the culprit is my RigRunner, purchased in March
of this year. When I took it out of line, the voltage drop went from
over 4V on tx to under 2V (13.8V down to about 12V). Current draw is
.78 to .82 amps on rx and 19.8 amps on tx. However, while the
internal power meter shows 100W, an external meter into a dummy load
only shows 70 watts out. The current and voltage readings look
normal, according to Rev. D10 of the owner's manual. But I'm still
concerned about a 30W drop at the output. Anyone have any other
suggestions?
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