Erik,
1. Please set the Windows System Environment variable
devmgr_show_nonpresent_devices to 1
2. Open Windows Device Manager and select View -> Show Hidden Devices
3. You will probably see far more COM port devices than seen previously
4. Expand Ports
5. (Expand Eltima devices
Sent From Sid Frissell's iPad
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Please
Can we change subject matter. Min is on the way and this is way to
freakey!!!
73,
Bill
K9YEQ
https://wrj-tech.com/
-Original Message-
From: elecraft-boun...@mailman.qth.net On
Behalf Of John Oppenheimer
Sent: Friday, June 22, 2018 5:27 PM
To: elecraft@mailman.qth.net
Subject:
Hi John,
Well if a picture is worth a thousand words a graph is worth at least
10,000.
THANKS for the posting!
73,
Bob
K2TK ex KN2TKR (1956) & K2TKR
On 6/22/2018 6:27 PM, John Oppenheimer wrote:
Here is a picture and some plot images:
http://www.kn5l.net/Elecraft/CP1/
Not
Offhand, since they are adamantly opposed to using operational ALC, I could see
incorporating a "1500 W" gain calibration, as they do with K3s. They could read
the output power at several frequencies per band and save the gain settings.
This assumes they have enough memory in the K3 to save
Use Device Manager/Ports/Advanced and change the port number(s) for the KUSB(s)
in question.
Sent from my iPhone
...nr4c. bill
> On Jun 22, 2018, at 2:04 PM, Erik Basilier wrote:
>
> I run two K3 radios with MicroHAM u2R for SO2R in N1MMplus.
> It has been working, but occasionally I get a
Here is a picture and some plot images:
http://www.kn5l.net/Elecraft/CP1/
Not super accurate 60 and 100 Ohm loads, but provides an insight of the
coupler operation.
John KN5L
On 06/22/2018 04:15 PM, Wes Stewart wrote:
> I don't quite understand your methodology but there is one, apparently
Wes, so well put. The expectations expressed don't include a whole new set of
variables when dealing with full power. The good thing: this list may help
those challenged to get help to figure out their issues. I can't wait to get
mine on the air!
72 & 73,
Bill
K9YEQ
FT’er for K2, KX1,
Update: ordered 4/24 has been shipping today. From everything I have read and
know about the amp, can't wait to wire into 240v and get on the air. Need more
power!!!@ Tired of not making marginal contacts on all bands to 6m. QRPpp is
my preferred mode when condx are there.
72 & 73,
Bill
My observation , also.
Another approach would be for automatic drive adjustment, or ALC that worked.
The latter, I know, is very difficult to do with an amp.
Scott K9MA
--
Scott Ellington
--- via iPad
> On Jun 22, 2018, at 2:36 PM, Paul Baldock wrote:
>
> I have found that if
Hi Alan,
that's true. What I did (was off a few hundred Hertz, too) was to
calibrate the main reference oscillator with REFLOCK enabled from a
stable 2 m source. Worked well.
73, Olli - DH8BQA
Contest, DX & radio projects: https://www.dh8bqa.de/
Am 22.06.2018 um 20:02 schrieb G4GNX:
Hi
I don't quite understand your methodology but there is one, apparently little
known caveat with the use of the "Elecraft" coupler topology. AFAIK, this was
first used by John Grebenkemper, KI6WX, in his Tandem Match, described in QST,
January 1987.
Paul Kiciak, N2PK, mentions in his paper,
OK, note my qualifier, "If". If there are other detrimental issues with greater
load mismatch then they might need to be addressed. Unfortunately, Elecraft
doesn't specify a load requirement for rated output. Gain ripple that you
observe is possibly a reflection (no pun intended) of the LPFs
Putting the Elecraft CP1 through the paces with a 2 port VNA can be
enlightening. The CP1 seems to be representative of Elecraft directional
couplers across the line. There's a picture of the W2 high power HF
coupler in the manual, it's just larger cores.
Sweeping a 20 dB CP1 across the band with
Hello all,
I have K3_Bandlimits 2-0-1.XEX , Is this firmware still good ?
Thanks everyone 73 Ken K5DNL
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Post:
"If 1.5:1 does this, then that's good enough in my book. Furthermore, a
better match might entail higher tuner losses. So why worry about it?
My test data for my KPA500 show there is a very significant difference in PA
dissipation and also in harmonic output for loads giving indicated 1.4:1
I have found that if the KPA1500 is feeding a
largish SWR (like 1.5:1 as you suggest) then the
drive power required to maintain a constant
output will vary significantly as you tune across
a band. This means you have to keep adjusting the
power control within a single band. This appears
not
Hi Don.
I just got back from 'experimenting'!
I turned the Reflock off and manually set the offsets according to the
figures on the Xverter top.
With the Reflock still turned off, the discrepancy is several KHz (I did not
note the exact figures).
With the Reflock turned back on, the
From the K144XV Reference Oscillator Phase Lock Option Installation Manual:
Recalibrating the K144XV
With the K144 XV Reference Oscillator Phase Lock option installed, you
no longer need to calibrate the two crystal local oscillators as
described under Frequency Calibration in the K144 XV
Alan,
I have not worked with the REFLOCK, but I believe the XV1 OFS parameter
must still be set in the menu. The REFLOCK cannot read the labels on
the top of the K144XV.
73,
Don W3FPR
On 6/22/2018 2:02 PM, G4GNX wrote:
Hi Don.
I am aware of the manual method of configuring the offsets
I do not, and probably never will, have a KPA1500. I do have a KPA500 and
KAT500 so I think I can comment. In my opinion, the function of these tuners is
to provide a match into which the amp can deliver full power. If 1.5:1 does
this, then that's good enough in my book. Furthermore, a
I run two K3 radios with MicroHAM u2R for SO2R in N1MMplus.
It has been working, but occasionally I get a message about COM port
conflicts, about the two COM ports that are used to control the radios, and
this causes problems during a contest such as tomorrow
I have spent some time looking
Hi Don.
I am aware of the manual method of configuring the offsets and I originally
used that before I installed the K144XV Ref lock option. The Ref lock option
manual infers that all offset calculation is automatic when the menu is set
to REFLOCK and user calibration can't be undertaken. Is
At 09:28 AM 6/22/2018, K9MA wrote:
That would explain why I sometimes hear the
relays click again when I transmit (I think).
Seems that could be fixed by simply requiring
that the difference be more than, say, 20 kHz
before the counter takes priority.
Scott K9MA
You are not imagining
That would explain why I sometimes hear the relays click again when I
transmit (I think). Seems that could be fixed by simply requiring that
the difference be more than, say, 20 kHz before the counter takes priority.
Scott K9MA
On 6/22/2018 11:00, Paul Baldock wrote:
True, it then double
True, it then double checks with the internal
frequency counter once rf is applied, and may
choose a different segment if the internal counter disagrees.
- Paul
At 08:48 AM 6/22/2018, K9MA wrote:
But wait! I know I hear the ATU relays switch
when I stop tuning the K3, before transmitting.
But wait! I know I hear the ATU relays switch when I stop tuning the K3,
before transmitting.
Scott K9MA
On 6/22/2018 10:01, Paul Baldock wrote:
They want to be certain that the amp is on the correct band, should
the data from the radio be incorrect.
- Paul KW7Y
I wonder why this is so.
"It might be but the amp is designed to work with radios other than K3s."
The KPA1500 and KPA500 are both capable of receiving frequency from
transceivers other than the K3S, so is the KAT500. I don't see how not using a
K3S puts any limitation on my proposal.
73,
Andy k3wyc
They want to be certain that the amp is on the correct band, should
the data from the radio be incorrect.
- Paul KW7Y
I wonder why this is so.
Scott K9MA
--
Scott Ellington
--- via iPad
> On Jun 22, 2018, at 1:17 AM, Paul Baldock wrote:
>
> frequency counter measurement, not
Alan,
Did you check the Frequency Calibration section of the K144XV option manual?
Look on page 19.
You can adjust the offset with the K3 menu XV1 OFS. The offsets for
each band segment should be indicated on the XV144 top cover. If you
have accurate frequency beacons available, you can
Andy -
Sounds like a great idea.
- Paul
6/22/2018, ANDY DURBIN wrote:
"Clearly there has to be some hysteresis to stop hunting. 25% of a
segment width might width be a good number to choose, but this would
require the current frequency counter to have improved resolution."
Why wouldn't it
I wonder why this is so.
Scott K9MA
--
Scott Ellington
--- via iPad
> On Jun 22, 2018, at 1:17 AM, Paul Baldock wrote:
>
> frequency counter measurement, not the frequency you transceiver sends to the
> KPA1500.
__
It might be but the amp is designed to work with radios other than K3s.
On 6/22/2018 5:01 AM, ANDY DURBIN wrote:
Why wouldn't it be preferable to use the transceiver's exact TX frequency, if
available,
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Post:
"Clearly there has to be some hysteresis to stop hunting. 25% of a segment
width might width be a good number to choose, but this would require the
current frequency counter to have improved resolution."
Why wouldn't it be preferable to use the transceiver's exact TX frequency, if
available,
We only have to wait maybe, 5 or 6 years.
I think we're at, or near, the 11 year cycle minimum.
If you think E openings are great, as the old saying goes, "You ain't seen
nuthin' yet" when the F-2 thickens up.
Unless the next peak is a wash-out for six meters, there'll be times when
you'll
Andy,
The problem is there are few stations in Alaska, whether they work 6m
or any other band. About 2002 it was stated there were 3802 licenced
hams residing in AK. Now you know half of them never get on at
all. Out of the other half 50% do only HF: the other 49% do only
VHF-FM. That
First let me say that other than some issues with
the ATU, I am after a week of use, very happy with the KPA1500.
So here's the ATU issues:
I find that the ATU very rarely will learn a
setting to get the SWR below 1.2:1 on any band. I
can usually tweak it down to 1.0:1 using the
Utility
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