Since updating to 1.67 my KAT500 tuner is behaving strangely. It won't tune
my 40 meter dipole on auto and when the KAT500 is placed in bypass the
K3 autotuner tunes the same antenna perfectly. I have tried different coax,
but the K3 autotuner at 25 watts output tunes the antenna nicely while the
I believe I have run into a problem with the KAT500 tuner and wanted to
mention it to see if anyone else is experiencing the same issue. I just
received the KAT500 tuner and the KPA500 amp and got it up and running
with my K3. The KPA500 works great but I am finding that the KAT500 is
unable to
Jerry,
If you want some numbers to chew on.
@65' a 40 meter dipole has an impedance of about 73 ohms. SWR=1.5
The same antenna on 20M has an impedance of 3788 - j1648 ohms with an
SWR of 89! Very high impedance. Why the K3 matched it, I can't say.
Do you think the KAT500 should be able
To: Elecraft@mailman.qth.net
Sent: Saturday, December 8, 2012 12:12 PM
Subject: Re: [Elecraft] KAT500 Tuning issue
Jerry,
If you want some numbers to chew on.
@65' a 40 meter dipole has an impedance of about 73 ohms. SWR=1.5
The same antenna on 20M has an impedance of 3788 - j1648 ohms
] on
behalf of Jerry Weisskohl [jweissk...@gmail.com]
Sent: Saturday, December 08, 2012 1:57 PM
To: Elecraft@mailman.qth.net
Subject: [Elecraft] KAT500 Tuning issue
I believe I have run into a problem with the KAT500 tuner and wanted to
mention it to see if anyone else is experiencing the same issue. I
: [Elecraft] KAT500 Tuning issue
One thing I ran into with an automatic hi powered tuner is that the firmware
does not allow all the otherwise available values of the components on certain
bands. This is done in the case of the MFJ tuner I am using (now until the KAT
arrives) on 40 Meters so
08, 2012 2:33 PM
To: Jerry Weisskohl; Elecraft@mailman.qth.net
Subject: Re: [Elecraft] KAT500 Tuning issue
One thing I ran into with an automatic hi powered tuner is that the
firmware does not allow all the otherwise available values of the components
on certain bands. This is done
Assuming that the feedline is ladder line or open wire for low loss, add
an eighth wavelength of feedline on 20 meters (about 8 feet). That may
or may not help on 10 meters (the problem is thee same, the radiator has
a very high impedance, and the feedline must be used as an impedance
Weisskohl; Elecraft@mailman.qth.net
Subject: Re: [Elecraft] KAT500 Tuning issue
One thing I ran into with an automatic hi powered tuner is that the
firmware does not allow all the otherwise available values of the
components on certain bands. This is done in the case of the MFJ tuner I am
using
Just to make sure we're all on the same page ...
When the tuner (at the radio) gets an acceptable match, that just
means the transmitter will _think_ there is a good antenna system out
there. The feedline between the antenna and the tuner will know
otherwise and can have points of very high
Mark,
Thanks for the reply. I received quite a few replies pointing out exactly
what you said. Because it wouldn't load on 20 meters I was using my other
antenna, which works fine with the KAT500 (80 meter vertical). However, I
was trying to understand why the 40 meter dipole wasn't working well
On 12/8/2012 2:49 PM, Mark Bayern wrote:
The feedline between the antenna and the tuner will know
otherwise and can have points of very high voltage that could cause
insulation breakdown, and points of very high current that can cause
overheating and will be a source of power loss. This isn't
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Jerry Weisskohl
Sent: Saturday, December 08, 2012 2:59 PM
To: Mark Bayern
Cc: Elecraft Reflector
Subject: Re: [Elecraft] KAT500 Tuning issue
Mark,
Thanks for the reply. I received quite a few replies pointing out exactly
what you said. Because
Sent: Saturday, December 08, 2012 2:59 PM
To: Mark Bayern
Cc: Elecraft Reflector
Subject: Re: [Elecraft] KAT500 Tuning issue
Mark,
Thanks for the reply. I received quite a few replies pointing out exactly
what you said. Because it wouldn't load on 20 meters I was using my other
antenna
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