Rich,
As you describe your configuration, your SWR bridge is between your KX2
and the antenna. The matching that takes place is within your KX2, and
apparently, the ATU was able to achieve a match. That doesn't change
what was happening on the transmission line from the antenna to your SWR
bridge, it is what is is and always was.
No "antenna tuner" in the history of humankind has ever "tuned" an
antenna. It's a really unfortunate choice of nomenclature. The ATU in
your KX2 transformed the impedance it saw at the antenna connector to
something the PA stage was happy with. That's all. Nothing changed on
the transmission line from the antenna as evidenced by your SWR Bridge's
report.
That very high SWR on your transmission line could be anything from a
"Not To Worry" to a "Very High Loss" situation. You didn't say what
your transmission line is, EDZ antennas are often fed with some form of
open-wire line. If so for you, losses are likely low. If it's fed with
coax, maybe not so much. If you make Q's, it's working, that's why it's
called "Amateur Radio." [:-)
73,
Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County
On 1/28/2018 4:31 PM, Rich Arland wrote:
While attempting to get Z60A on 40M last night I ran into a problem that I
never encountered before.
My KX2 has the built in auto ATU. I took the output from the rig into a QRP SWR/PWR bridge and then
into my 40M EDZ and hit the "ATU" on the rig. "Click, Buzz" and the rig came up
with a 1.0-1 SWR reading. HOWEVER, my QRP bridge was pegged in reverse indicating that there was no
match.
Earlier I had tried this set up on my 20M Yagi and it worked great. The rig
gave me 1.0-1 and the analog meters on the QRP bridge did the same.
The only thing I can think of is the 40M EDZ is the problem. I am going to try
removing the QRP bridge and see if that makes a difference.
In the mean time, anyone have a guess as to what I am seeing on 40M??
Vy 73 es gud DX!
Rich Arland K7SZ
Bent Dipole Ranch, Dacula, GA
Author: "ARRL's Low Power Communications, the Art and Science of QRP" (all 4
editions)
Cogito ergo CQ (I think therefore, I HAM)
http://commobunker.blogspot.com/
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