Excellent condition K3S/100 and P3. I’m the original owner and it has served
me well.
K3S/100. With KRX3A second receiver, KDVR3 digital voice recorder, KAT3A
tuner, KTCXO3-1 TCXO, and 2.8 KHz filters in both the main and second
receivers. $2749
P3 Panadapter. Comes with cblp3y cable to
Right. Almost ten years ago, I used an audio FFT to measure the
harmonics in a Thinkpad's line level (also used for headphones) output.
The distortion decreased by 10 dB when the output was first set just
below clip and then reduced by 6 dB (half the output voltage). Just
below clip, the
Among other issues, this article is incorrect when calling for the
"Device" (Master) volume level in Windows to be set to 100%. Nearly
every sound card for which I've seen test results has increased
distortion above the 70 - 80% level (-1 to -2 dB or -3 to -6 dB
depending on the driver
Perfect, that is what I thought but wanted to verify with the group
Rich
On 6/28/2019 17:11 PM, Walter Underwood wrote:
Yes, that is the purpose of the TUNE button.
"One measure of how close an antenna is to resonance is its SWR (standing wave
ratio). The KX3 displays SWR in TUNE mode (pg.
Yes, that is the purpose of the TUNE button.
"One measure of how close an antenna is to resonance is its SWR (standing wave
ratio). The KX3 displays SWR in TUNE mode (pg. 14). “KX3 manual, page 6
"TUNE is used to put out a CW signal at the power level selected by the PWR
control. This is
I am working with a resonant 20m vertical.
With the ATU off, when I press the Tune button I see an SWR reading, is
that the SWR the rig is seeing with the ATU in bypass?
I assume it is, but I thought I would ask the masses to be sure.
Thanks
Rich
K3RWN
LiFePO4s will stay at high enough voltage for most of the discharge cycle
to keep the KX3 above 15W. 9Ah will run it a long time.
Regards,
Mark
On Fri, Jun 28, 2019 at 1:14 PM Chris Waldrup wrote:
> Will the Bioenno batteries have enough terminal voltage to get the 15W?
> I'm looking at a
Analog ALC is a fully closed loop too. And Elecraft measuring the output and
generating feedback isn't without flaw either. There is an ADC in that output
measurement system that introduces low-level power jitter easily observed on a
spectrum analyzer.
Wes N7WS
On 6/28/2019 12:04 PM, Don
I have the TX monitor feature in my K3/P3.
I find that feature very useful.
Will that same capability be built into the K4, and can I use the same sensor?
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Richard,
When you put the KX3 into DATA A mode, the mic gain is reduced to
something resembling Line level.
Depending on your soundcard output, you may still need an attenuator.
Strive for each audio control in the computer and application to be at
30 to 50%, and then if you have too much
Depends on the time constants.
Wes N7WS
On 6/28/2019 11:51 AM, Dr. William J. Schmidt wrote:
It's very nature causes the resulting overall transfer function to become
non-linear, leading to distortion and other unwanted by products when active.
-Original Message-
From:
Will the Bioenno batteries have enough terminal voltage to get the 15W?
I'm looking at a 9Ah unit and if so will stop by Gigaparts on the way home from
work today and pick one up.
Chris
KD4PBJ
> On Jun 25, 2019, at 9:46 AM, Walter Underwood wrote:
>
> That may be, though the discharge curves
" which measures the actual power output, compares it with the set power
and adjusts the RF drive accordingly. This is a fully closed loop
system. As far as I know, Elecraft is the only amateur transceiver
using that type of system."
I think you will find that is exactly how TS-590 power
Brian,
ALC should never be used for power control doing so usually causes RF
compression and distortion.
Many of the digital application instructions tell you to set for NO ALC
as a *maximum* audio level, set the power control for the maximum
desired and then reduce the audio level to
That's interesting thanks. It means that by aiming for no ALC indication
I've been under modulating.
I assume the input stage in the KX3 can take higher levels?
On Fri, 28 Jun 2019, 16:35 Bob McGraw K4TAX, wrote:
> Well written generic paper for operation of FT-8 and other digital
> signals of
Did you pay VAT on the repair?
On Fri, 28 Jun 2019, 19:08 Roger Stein, wrote:
> Brian,
> I used Canada Post to send my K3 #75 in for repair. Elecraft used USPS for
> return. Documents were marked “for repair”. No hassle, no brokerage fees,
> just return shipping fees. Tracked package online
You'd think they'd include the predictable fees in the price to the sender.
It will be really bad if they charged the recipient, especially if the
parcel went through customs ok.
On Fri, 28 Jun 2019, 19:35 Don Wilhelm, wrote:
> Brian,
>
> Use the postal system. There are no "brokerage fees"
It's very nature causes the resulting overall transfer function to become
non-linear, leading to distortion and other unwanted by products when active.
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Brian Denley
Sent:
On 6/28/2019 11:38 AM, Brian Denley wrote:
I have always thought that ALC is not appropriate for power control. It’s a
protection system. Over use of ALC acts like compression.
You are absolutely right. ALC should never be used between a transceiver
and an amplifier for power control.
I have always thought that ALC is not appropriate for power control. It’s a
protection system. Over use of ALC acts like compression. No?
Brian
KB1VBF
Sent from my iPad
> On Jun 28, 2019, at 1:11 PM, Jim Rhodes wrote:
>
> Yes Andy, I used a TS590 at field day. But this is the Elecraft
Brian,
Use the postal system. There are no "brokerage fees" charged by the
postal system. UPS and FedEX do charge "brokerage fees" Customs is a
different matter - usually properly marked customs forms will go through
with no problem.
73,
Don W3FPR
On 6/28/2019 11:48 AM, Brian “VE3BWP”
On 6/28/2019 9:37 AM, Paul Christensen wrote:
Looking for input from anyone who has successfully installed a
surge-suppression device on a USB port. I am in the process of repairing a
KIO3B board after a recent thunderstorm.
Paul,
The usual cause of destructive failures like these from
Brian,
I used Canada Post to send my K3 #75 in for repair. Elecraft used USPS for
return. Documents were marked “for repair”. No hassle, no brokerage fees, just
return shipping fees. Tracked package online going and return. Worked just
fine. All the best.
73, Roger VA1RST Halifax
Sent from my
Yes Andy, I used a TS590 at field day. But this is the Elecraft reflector.
These rigs work differently. Use my K3 for FT8 often. I built an interface
for my Kenwood rig too. But you treat them differently.
Jim Rhodes
K0XU
On Fri, Jun 28, 2019, 11:21 Andy Durbin wrote:
> I strongly disagree
Paul...
This is not exactly what you are describing, but it fails open.
https://hifimediy.com/usb-isolator
I've used one at a digipeater site and it took a static hit think - nearby
strike - it protected the TNC and PC. It was open on every line.
I have used them for ground loops with sound
Looking for input from anyone who has successfully installed a
surge-suppression device on a USB port. I am in the process of repairing a
KIO3B board after a recent thunderstorm.
The KIO3B uses an ST Microelectronics USBLC6-2 ESD protection device at the
front end of the K3's USB connector.
I strongly disagree that ALC should be zero for FT8 but that is based only on
my experience with the TS-590S.
My draft paper on FT8 harmonics can be found here -
https://www.dropbox.com/s/85aoc937kz235iq/FT8%20audio%20harmonics%20draft%20d%20k3wyc.pdf?dl=0
ALC must be in the control range for
I used UPS and need to write up my experience. Your question will encourage
that!
I found that UPS's Customs Forms generator produced a Sales Invoice even
though I asked it to produce a Temporary Export for Repair. So I crossed
out the Sales part and wrote in pen that this was a repair and will
I’m hoping to hear from any Canadian HAMs who have successfully sent their
radio (KX3 in my case) to Elecraft USA for repair and got it back with the
least amount of brokerage hassles.
Which carrier did you use? How did it go?
I ask because I once had to send a Yaesu in for a warranty repair
Well written generic paper for operation of FT-8 and other digital
signals of like mode. It does not totally nor correctly apply to
Elecraft radios as power management is handled by a totally different
means. And those means and methods suggested in this paper are not
applicable to
Surplus to my needs, a PR6 preamp for K3. Includes all necessary connectors
and cabling for plug-and-play addition to your K3.
$60 shipped to US, CAN addresses. If interested, please inquire off list.
Tnx for reading.
73
---
Ted WA3AER
I don’t specifically use the 4O3A switch, but I do have single amp SO2R using a
KPA1500 and two K3s. I’m using a MK2R to generate the band data with a set of
4 TopTen A-B switches to handle the RF switching. An Arduino handles the
AuxBus messages between the amp and the radios.
The amp
Excellent point on the band data issue John. I was holding out for the
Flex amp but no tuner is an issue for me with my low band antennas. If
they ever put the tuner in the amp I will consider it. Will have to study
the band data issue.
Richard
*W7ZR* ex:5C5Z, CN2ZR, K2JSP, W6SBZ, W7KXR,
Does anyone know of any rig that uses "compression" rather than linear gain
control to implement ALC?
ref - https://www.dropbox.com/s/f4uaop5tqwzaweu/FT8Noise6.docx?dl=1
73,
Andy, k3wyc
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I think the biggest obstacle would be switching the band data to the
KPA-1500. If you operate 2BSIQ it really pushes the amp duty cycle,
especially on RTTY. The Flex amp is already set up for this.
John KK9A
Richard Zalewski W7ZR wrote:
Messages sorted by: [ date ] [ thread ] [ subject ]
Hey,
I just signed the petition "Australian Parliament: An inquiry into truth in
political advertising" and wanted to see if you could help by adding your
name.
Our goal is to reach 25,000 signatures and we need more support. You can
read more and sign the petition here:
Radio amateurs have agreed to use one time only: It was called GMT and
now UTC and uses a 24 hour format... Let's stick to that folks, wherever
you live!
73,
Peter, PA0PJE
Op 27-06-19 om 22:36 schreef Bob McGraw K4TAX:
Indian Chief said; "White man stupid. Thinks he can cut 12" off of
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