No special configurations. Make sure you have the correct antenna
ports selected via the K3S and the KAT500. And since the dummy load
shows a high SWR, I would first suspect the coax jumper out of the radio
to what ever is next in line.
73
Bob, K4TAX
On 12/3/2018 10:49 AM, Richard Hoffman, K1DJ via Elecraft wrote:
I put up my first 160 meter antenna last week in anticipation of participating
in last weekend's contest. I managed to get the antenna -- a slow slung
inverted L with a single raised radial as a compromise on my tiny 100 by 100
foot lot -- up in time. I then managed to get the antenna down to an SWR of 2
to 1 measured by a Rig Expert AA55 zoom analyzer, at the balun to which the
raised wire and radial are directly attached, and ythen got the same 2.0 SWR
reading at the shack end of a borrowed piece of about 50 feet of RG-213. [I
recognize that 2 to 1 is not perfect by any means, but it was certainly within
the range of my Elecraft equipment, I thought.]
But then my K3S simply refused to tune or load into the antenna, either
directly, using its internal ATU, or routed through my KPA-500 to a KAT-500
tuner. In both circumstances, the rig and/or tuner showed an SWR around 25 to
1, and tuned at best to around 16 to 1, resulting in no apparent RF output.
After trying to fix this in various ways, I gave up on the 160M contest and
turned to other pursuits, while seeking advice from several Elecraft-loving,
160M-using, friends.
It finally dawned on me this morning to connect the rig to my dummy load. The
result of attempting to tune and load the dummy load is exactly the same as it
was trying to use the new inverted-L: initial 25 to 1 SWR, tunes down only to
16.9 to 1.
The rig, amp, internal and external tuners, and dummy load work fine on 80M
through 6M. This is my first time trying them all on 160M.
QUESTION: Are there special configuration or other steps I need to take to
operate the K3S on 160 meters? Do these symptoms suggest any other problems
that you can help solve?
Please advise, and thanks!
73 -
Rich, K1DJScituate, MA
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