Then you'd be using the T1 to partially drop the SWR on the coax, but it
still wouldn't be anything close to 1:1 unless the T1 has a much broader
range than the tuner in the KX2. You'd still have some additional coax
loss due to SWR (but less loss, of course) and you'd still need the
tuner
The SWR could easily exceed 15:1, depending on the operating frequency (short
loaded whips can be very narrow banded) and other factors that apply to
portable operation such as radial configuration, ground characteristics, and
antenna height.
Even 2 dB matters when you're using QRP.
Wayne
Scroll down to the original post. We were talking about a KX2 with an
internal antenna tuner. Presumably the tuner works as it should to
present the proper load to the finals.
73,
Dave AB7E
On 8/7/2019 5:29 PM, Mark Goldberg wrote:
You need to take into account the radio finals. When
Some points…
“…dragging along a remote tuner”
Surely you are kidding or you get the award for hyperbole of the day. The T1
fits in my shirt pocket! It is zero effort to bring — no “dragging” required.
And, I operate with 50 feet of coax because carrying multiple different lengths
of coax on
Doesn't much matter. You're still talking a 3 dB difference at most (50
feet vs 30 feet), and while I will be the first to argue the benefit of
every single dB for normal station operation (see
http://www.ab7e.com/weak_signal/mdd.html), I don't understand the angxt
over that 3 dB for
Yeah, i didn't catch that he was going to use the internal tuner and just
forgo the external one at the other end of the coax.
In that case, I agree with Dave.
73,
Mark
W7MLG
On Wed, Aug 7, 2019 at 6:19 PM Wes wrote:
> I haven't been following this thread closely but I think Dave makes good
I haven't been following this thread closely but I think Dave makes good
points. As to the final fold-back, if I waded through this correctly, I
understand that the OP has the built-in tuner in his KX2. That solves that issue.
BTW, SWR = 15:1 is a return loss of about 1.1 dB, not 3 dB.
Wes
See below.
GL,
/Rick N6XI
On Wed, Aug 7, 2019 at 2:24 PM Larry Libsch wrote:
> I am trying to set up the KPA1500 Remote Software to access my KPA1500
> from a distant location over the internet. Some questions:
>
> Will I be successful using a reserved IP rather than a static IP?
>
Probably.
You need to take into account the radio finals. When the SWR is high, My
KX3 cuts back because it gets too much reflected power. I expect the KX3,
and in fact any other radio or amplifier is similar. 15:1 is about half the
power coming back.
Regards,
Mark
W7MLG
On Wed, Aug 7, 2019 at 5:14 PM
Rather little of this discussion makes sense to me.
Let's look at this realistically:
1. The antenna tuner in the KX2 is rated to be good up to 10:1 SWR.
Let's assume it's good to 15:1.
2. Let's assume you're using a decent cable for portable operation like
RG-8X.
3. Let's assume
Sounds like an idea worth trying — I have always wondered about the coax loss
between my KX3/KX2 and my portable antenna no matter which one it is (i.e.
AX-1, Wire and counterpoise wires, Buddipole, etc.).
But, really glad I did not sell the T1 on several occasions of thinking about
selling
This is a basic K3s purchased purchased 2015.
Includes:
KPA3A 100W upgrade
KANT3
The sub receiver was added in 2018.
Sent from Mail for Windows 10
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Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help:
Neil,
When you did initial setup of the K60XV, did you
set D19 to Yes?
Cheers,
Alan
Alan D. Wilcox, W3DVX
570-916-9590 (cell, text)
https://WilcoxEngineering.com
http://www.eham.net/reviews/detail/6768 ... Elecraft Client Comments
http://amazon.com/author/alandwilcox
Williamsport, PA 17701
> On
I am trying to set up the KPA1500 Remote Software to access my KPA1500
from a distant location over the internet. Some questions:
Will I be successful using a reserved IP rather than a static IP?
The laptop I plan to use as a server is on the same LAN as the KPA1500.
When I click the Host
Thanks very much for pointing me to the right place, Mike. I also received
an off-list reply from Dennis, saying the same thing. I recalled seeing
those, but didn't know what I was looking at, I guess. Now I don't have to
lean forward to push the button. I'm calling it "ergonomic
I have K1 s/n 3502 for sale. It has 40M and 20M on board and the KAT1
antenna tuner. From the pictures you can see that I have added a
homebrewed tilt stand that also doubles as a convenient carrying handle.
Included will be a Texas Instrument 12V, 2A power supply. $375 shipped
to CONUS.
On pg. 23 of the ELECRAFT K3 AND KX3
PROGRAMMER'S REFERENCE - there is a table of SWT/H constructs ...
SWT21 - plays M1
SWT31 - M2, etc.
- 73 and good DX de Mike, K6MKF, NCDXC Secretary
> -Original Message-
> From: elecraft-boun...@mailman.qth.net
> On Behalf Of Ken Bandy, KJ9B
> Sent:
I am wondering if there is a command sequence string that will play a
recorded message on my K3S. I have looked through the programmer's guide
for the radio, but nothing popped out at me before my eyes glazed over...
Thanks in advance.
Ken, KJ9B
Michael,
I have had no issues using the Raspberry Pi without a GPS time reference. As
long as you have an internet connection when the RPi is powered up, the
internal clock should be close enough to use for hours. In the field I use my
iPhone as a WiFi hotspot for an internet connection to the
Michael,
I have good luck using my KX3 with a Raspberry Pi 3B+ and also the new
Raspberry Pi 4 for both JS8Call and WSJT-X. I use an inexpensive USB audio
adapter/sound card and standard stereo 1/8" (3.5mm) male to male cables
connected between the MIC and PHONES jacks on the KX3 and the sound
If that turns out not to be supported, there are ethernet<->serial
adapters that are used to provide remote console ports on web servers.
I think Black Box, Raritan, and others make them.
Scott
AD6YT
On Wed, Aug 7, 2019 at 8:47 AM K5WA wrote:
>
> Wayne (or anyone),
>
>
>
> I have a rather
I think a T1 at the base would make a noticeable difference if the coax were
more than a few feet long and the whip's resonance well removed from the target
operating frequency. Short whips can be extremely narrow-banded.
Wayne
> On Aug 7, 2019, at 7:40 AM, Don Wilhelm wrote:
>
> Bret,
>
Bret,
Yes, the T1 mounted at the antenna will reduce the potential loss in the
coax.
Will you notice the difference? Maybe or maybe not.
73,
Don W3FPR
On 8/7/2019 7:54 AM, MaverickNH wrote:
It comes to mind I have an Elecraft T1 ATU I might try attaching directly to
the base of the AX1
Bob, K5WA wrote:
> I have a rather specific question. When I operate locally with a K4, I need
> an RS-232 connection to the local computer/accessories but when I'm remote,
> I will only need the K4's ethernet connection. Can the K4 have BOTH enabled
> simultaneously?
Yes. The K4 can be
"In the K3S, it is one or the other (USB or RS-232)."
That limitation is surprising to me. My Kenwood TS-590S allows simultaneous
use of USB CAT and COM CAT. My current station architecture would have been
much more difficult to implement without that capability.
73,
Andy, k3wyc
Wayne (or anyone),
I have a rather specific question. When I operate locally with a K4, I need
an RS-232 connection to the local computer/accessories but when I'm remote,
I will only need the K4's ethernet connection. Can the K4 have BOTH enabled
simultaneously? In the K3S, it is one or the
I have an Elecraft K3/100 HF radio at 100Watts SN000348 with the matching P3
Pan adapter! The K3 has the following options: KAT3A ATU,
KTCX03,KBPF3A,KIO3,KXV3 and the following Inrad filters KFL3A-400, KFL3A-2.1K
and KFL3A-2.8K These are from a non smoking home and they also have the
I did a lot of testing with a tuner followed by a high-quality DX
Engineering balun in a system with high, reactive SWR. I did not push it
far enough to destroy the balun, but I did note a gradual increase in
SWR. And yes, the rate of increase sped up as it got hotter. So I
suggest testing
"It is possible that the ferrites are heating. If that is the case, you could
test it by transmitting a steady carrier for a minute while watching the SWR.
If it’s heating, there should be a gradual rise."
I have data for SWR runaway events that I believe were caused by heating of the
ferrite
It comes to mind I have an Elecraft T1 ATU I might try attaching directly to
the base of the AX1 rather than relying on the KX2 ATU 25-40ft from the
antenna. I try to operate closer but sometimes have to run that RG58 to
clear obstructions. Thoughts?
Bret/N4SRN
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