Good Evening,
The week began with very hot weather. It peaked on Tuesday at 110
degrees. Luckily no one started a fire. I coped by eating jalapenos
and drinking a lot of water. Then it slacked off. Two days later the
clouds came back with morning fog. It did get to 82 today but it
Ahh, well, a few comments clarifications, from a guy with 38 years of
experience (HVAC/mechanical and controls engineering) with Carrier air
conditioning.
Opening comment (not really my area of expertise, but I do have moderate
relevant experience), the heat pain threshold is quite variable
Rob,
Hopefully, you'll get better answers from others but I'm going to guess that
you meant a 2nd (SUB) receiver and not a "second channel". I have installed
three 2nd receivers in the K3s I used to own and you need to make sure all
the coax cables are well seated into their proper ports. It
Hi Walter,
In response to your comments on my post, the terminology you use and that I
used both appear in various texts to describe the same thing. Not
surprising, we both know what one another mean. I prefer incident because
quadrature is in relationship to that. An AM signal would appear on
Jerry,
I have had only marginal success with the Soldapullt, but I have a Hakko
808 that works very well - with the correct tip it does the job nicely -
it heats and then you pull the trigger to extract the solder. Not
inexpensive, but when I was doing repairs on a daily basis, it was a
On 2021-07-03 11:03, VA1CQ wrote:
Any tips on removing them would be appreciated.
*** Crush them with a pair of pointy vise-grips? Of course, I'd try
desoldering them first. Hold the heat on a bit longer than seems
necessary, because you need to melt that solder all the way to the other
100°F is well within the survivable body core temperature range, so it
should never trigger pain receptors.
In fact, I believe it was defined based on the nominal core body
temperature of a cow.
Did you mean 100°C?
--
David Woolley
On 04/07/2021 00:03, Francis Belliveau wrote:
Another
Thanks for all the info and advice, both here and off-list. I will
install the current driver from the FTDI website. I've done it several
times for Elecraft and astronomy equipment, and it's easy. No reason not
to do it.
73, Mike N4CF
Doug,
You have had suggestions on this reflector on how to get in DATA A mode.
As far as audio levels are concerned, I have an article on my website
www.w3fpr.com that may be helpful.
Scroll the left column to the last entry and click to open the document.
Bottom line is that you must have 4
Don,
I took your advice and crushed those two relays. Even doing that, it was
tough enough to get both relays out and clean out the solder pad holes.
It's done and the K2 is ready for me to pop in two new relays. I even
used a couple toothpicks in the process. I confirmed the stenciled
Another rule of thumb for those who care.
When you hold a finger on something and it is 10 seconds to pain threshold,
that location is about 100 degrees F.
This is not an absolute constant, but I have checked it a few times since I was
told that, and it seems to be true for me.
> On Jun 30,
It sounds like your audio is not getting to the K3. There are
many places it can get lost, including wsjt-x, the selection of
output devices in wsjt-x, the OS audio chain (seen frequently in
Windows, but also other OSes), and in the K3 -- are you sure
your computer is connected to the transmit
To get to DATA-A, use the DATA MD button, it is the long press of AFX.
73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources
On 7/3/21 3:20 PM, Dave wrote:
Hi Doug,
I transmit using DATA-A
Hi Doug,
I transmit using DATA-A mode. You might also check to be sure you have
your computer audio feeding the active input port on the K3.
If you get really stuck, send me a not off list, and one of us can call
the other, and I can talk you thought rig setup.
73, and thanks,
Dave (NK7Z)
Guys
I have k3 with all the options available except finals. I have installed the
ftdi driver. The receiver sends frequency and decodes wsjt signals correctly.
In the wsjt program the cat test turns green and the ptt works ok. When I call
cq the transmitter is keyed but no power is sent out.
I don’t know how their Y cable is wired, but a simple wiring will tie the
logic bias (mic buttons) and mic bias together. That gives a lower bias
voltage and lower mic output for some mics. It also adds some noise,
because the logic bias isn’t as clean as the mic bias.
You can split out the mic
No luck sorting this out in the field during FD, especially with a
workaround available. (Alternative mic.) I'd like to resolve it if
possible before replacing the Pro 7, the KX3, or both. :-O So, now
that I'm unpacked at home, I'll try a simple setup for debugging.
Trouble shooting setup
I strongly suggest that with any OS, try it first. If it works,
then you're done. If not then perhaps install a driver or take
some other action.
After a MacOS upgrade, I lost contact between my computer and
K3. The cause turned out to be a driver I had installed. The new
system had a FTDI
Murray,
Yes, Elecraft has those relays.
If you do not have adequate desoldering gear, the the best way to remove
them is to crush the case so you can remove the pins one at a time.
Clean up with solder wick and if solder remains in the holes, push it
out with a wooden toothpick. Use
Two things about terminology. First, IQ is generally in-phase and quadrature.
Also, what you are describing as direct conversion is commonly called direct
sampling.
The K4 is a direct sampling receiver. The KX2 and KX3 are direct conversion
receivers,
converting RF directly to baseband without
Hi Don,
I have discovered I installed K1 and K2 backwards. The location bar on
each relay is facing in the opposite direction ("down") from the other
relays. The manual Parts Placement Drawing clearly shows all relays
oriented vertically must have the bar on the relay at the "top". I can't
I recently installed the second channel and general coverage receive options on
my k3 with the 100w transmitter. I have double checked the settings but get
now transmit power.
Any ideas on what the issue is?
Rob Mantz
NR4B
Sent from my iPhone
Dell loads an OEM version of Windows 10, complete with their “bloat ware”. I
use a true Windows 10 Pro ISO from Microsoft, not the home version or OEM
version. That may explain why some do not need drivers and others do. I just
installed a fresh copy of full Windows 10 Pro (created USB
My career has been in software/hardware systems including some with signal
processing. Digital filters ultimately embody mathematical equations which
operate on a matrix of samples represented as complex numbers. IQ stands
for incident and quadrature, sine and cosine, real and imaginary or x and
I have been adding several newish computers for ham radio to bring
myself farther into the 21st century. Lately Win 10 does not
automatically install the FTDI adaptor. My latest computer as of about
May 1st (brand new from Dell) did not load the driver when I plugged the
FTDI adaptor in. I
FWIW, I plugged KXUSB into my Win10 Pro PC, and as reported by Dave WO2X,
it operated as intended (communicating with KX3) w/o having to install
drivers.
Quite generally, my modus operandi with stuff like this is to just plug it
in and try it before investigating possible additional required
On 7/2/2021 10:26 PM, Vic Rosenthal wrote:
What a beautiful tribute.
I too had a lot of help from 20-something hams when I was an annoying teenager.
As a teenager wanting to be a ham, and later with my license, I got lots
of help from guys who seemed old to me at the time. I'm guessing most
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