If anyone has the parts for the backlight mod for the K2 and are willing to
sell them I am interested. Please let me know price. Thanks in advance.
72/73,
EM73vx
Robin
G-QRP #12386
SKCC #7294
W4IEN
w4...@comcast.net
__
Elecraft
Save one; the screwdriver antenna on my truck is tuned (coil adjusted) by the
TurboTuner attached to my radio until a match is found.
And an argument could be made that a SteppIR controller performs a similar
function.
The rest are matching circuits to compensate for the disparity of input
That's not in the least true, but those among us fixated on semantics
continue to push that tired old myth.
You could, for example, have an antenna with a feedpoint impedance of 50
- j40 ohms, and if you insert 40 ohms worth of inductance in series with
the feedline at the feedpoint you
On Friday, July 17, 2020, 10:03:24 PM EDT, Fred Jensen
wrote:
> No antenna has, at any time, anywhere in any of our lifetimes, been
> "tuned" by an "antenna tuner."
Unless the "tuner" is simply a broadband transformer, I might agree.
But if the "tuner" is an LC network, like an adjustable L
Lyn,
That's a reasonable design, and if you have it high, I am not
surprised it's working out well for you. Not every ham has the liberty
to put up, grow, an antenna farm. I am in that position. I have only two
antennas up, a 20 meter vertical dipole center fed which I operate 20-10
and
No antenna has, at any time, anywhere in any of our lifetimes, been
"tuned" by an "antenna tuner." So called antenna tuners are 2-port
impedance matching networks ... all of them ... and their job is to
match the impedance on one port to another impedance on the second port,
period. Nothing
On Friday, July 17, 2020, 7:10:32 PM CDT, Kurt Pawlikowski
wrote:
> Ken: In some respects, a "matching device" at the base of the antenna is a
> tuner! {'-) It accomplishes the same function... {'-) k
> WB9FMC
On Friday, July 17, 2020, 08:21:54 PM EDT, Ken Roberson via Elecraft
wrote:
>
Barry -
+1
I use nothing but 600 ohm OWL (True Ladder Line) and a short piece of coax
connects to a 1:1 / 4:1 hybrid balun to allow matching the impedance perfectly
with my KAT500.
The antenna is a 360' center fed EDZ (design frequency of 3.5 MHz). The KAT500
matches it on all bands 160 -
Wes,
You're correct that open wire/ladder line transmission lines are
not a panacea. But, in the average ham stations, open wire does overcome
high losses with high SWR, or not so high SWR. What is needed is a look
at the ARRL Antenna book for transmission line loss/100 ft. as a
function
Dave - RRR - 73 Ken K5DNL
On Friday, July 17, 2020, 7:24:10 PM CDT, Dave Cole wrote:
Tuners... Tuners... We don't need no stinking tuners... Real men use
antennas that don't need stinking tuners...
Sorry I had too...
73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer
Tuners... Tuners... We don't need no stinking tuners... Real men use
antennas that don't need stinking tuners...
Sorry I had too...
73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist
ARRL Asst. Director, NW Division, Technical Resources
On
Kurt,
We are not tuning the antenna , we are matching the antenna to the coax at the
base of the antenna.
73 Ken K5DNL
On Friday, July 17, 2020, 7:10:32 PM CDT, Kurt Pawlikowski
wrote:
Ken: In some respects, a "matching device" at the base of the antenna is a
tuner! {'-) It
Ken: In some respects, a "matching device" at the base of the antenna
_/is/_ a tuner! {'-) It accomplishes the same function... {'-) k WB9FMC
On 7/17/2020 6:34 PM, Ken Roberson via Elecraft wrote:
Antenna tuners
I never use an antenna tuner , on the MF and LF bands realmen use a scopematch
Antenna tuners
I never use an antenna tuner , on the MF and LF bands realmen use a scopematch
at the
Output of the Power Amp and a matching device at the base ofthe vertical
antenna – HI Hi.
73 Ken K5DNL
__
Elecraft mailing list
I wrote about some of this in my paper ARRL Antenna Compendium paper on ladder
line 20 years ago. https://sadxa.org/n7ws/Ladder_Line.pdf
I've seen pictures of those SW transmitting plants and always assumed that they
must have been very efficient. Upon reflection---no pun intended---now I'm
I don't know these cables but I would like to add a caution. Some Elecraft
"RS-232" interfaces are true RS-232 (voltage swings greater than +/- 8 volts)
and others are TTL (voltage swings between 0 V and 5 V). Be sure you know
what you are connecting to what. Some of the receivers are
Mine took more than a couple of turns [9 to be exact] of the supplied
flat cable right up next to the radio connector.
73,
Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County
On 7/17/2020 1:43 PM, Keith Trinity WE6R wrote:
I use about a 5 foot nice flexible old computer mouse cord.
Goes from
TNX
Sent from my iPhone
...nr4c. bill
> On Jul 17, 2020, at 10:08 AM, Dick Dievendorff wrote:
>
> My K-Pod, an early one, has a rear-panel USB-B connector labeled "USB", used
> to install K-Pod firmware and also for a K4 connection. K-Pod DC power is
> also provided through this cable.
>
A DB15 is not going to connect to the DE 9 on the back of the radio. A DB15 is
a much larger connector.
Also, converting the KXUSB to use on a K3 is not going to provide all the
signals that the KUSB has. No RTS/DTR.
Sent from my iPhone
...nr4c. bill
> On Jul 17, 2020, at 9:29 AM, Ken
Resonance is over rated. The problem of believing you must have a
resonant antenna arose with the use of coax cable began. High SWRs
causes high system losses.
Prior to the widespread use of coax, open wire was used and few antenna
systems were really resonant, and nor were they reflecting a
A similar concoction is readily available in the U.S. Depending on who
manufactures it, the brand might be Penetrox, NoAlOx or OxGard. It is used by
electricians to enhance aluminum to aluminum and aluminum to copper or brass
electrical connections. Each of these products appears to be a
On 7/16/2020 11:31 AM, KENT TRIMBLE wrote:
>
> The "quarter turn" idea most often refers to the trick of backing-off a
> screw "a quarter turn" and then re-tightening in order to break up
> corrosion. More than one restorer has brought vintage equipment to life
> by doing nothing more than that.
I have the volunteer I needed to scan QST for me. Thanks, everybody.
Al W6LX
- Forwarded Message -
From: Al Lorona
To: Elecraft Reflector
Sent: Friday, July 17, 2020, 01:41:11 PM PDT
Subject: [Elecraft] [OT] QST Scan
This is a request for a favor... to anybody who's got a
I use about a 5 foot nice flexible old computer mouse cord.
Goes from the RJ 6-pin "Radio" jack on K-POD to bottom of K3 Front Panel.
I did NOT connect a wire to the one unused pin on either end, so you
only need 5 wires.
It works but I occasionally get RF into it on 80m as my antenna radiates
Oh sorry. I was still thinking of usb. The aux out can control an external
device like an antenna switch...with a macro. Page 12
Jack BMW Motorcycles
Chuck KE9UW
c-haw...@illinois.edu
Sent from my iPad
> On Jul 17, 2020, at 2:37 PM, hawley, charles j jr
> wrote:
>
> Computer hookup for
Keith Ennis (KV5J) is proud to introduce the second in his line of Digital
Display Units.The Digital Display Unit for Elecraft's KPA500. For the Elecraft
KPA500 I have designed a compact, easy to read Digital Display Unit (DDU). It
allows the monitoring of 5 crucial readings all at the same
This is a request for a favor... to anybody who's got a complete QST
collection... would you be willing to scan 1 page from 1995 and send the scan
to me? The low-res scanned copy on the QST Archive at the League's web site
doesn't clearly show a detail that I'm interested in.
If you're able
On 7/17/2020 6:35 AM, Charlie T wrote:
ust to make this plain, do NOT run your 100/200 watt radio at max output
and depend on the ALC connection to cut it back.
Right! Using ALC between power amp and rig to set TX power is a recipe
for massive splatter and clicks.
73, Jim K9YC
Computer hookup for upgrades
Chuck Jack Hawley
KE9UW
Sent from my iPhone, cjack
> On Jul 17, 2020, at 1:20 PM, Fred Jensen wrote:
>
> Just curious and a bit too busy to go look it up right now, what is the AUX
> jack for on the back of my K-POD?
>
> 73,
> Fred ["Skip"] K6DGW
> Sparks NV
Thanks, Rich. "All industries are equal, but some are more equal than
others."
I'm amazed at the folks that seem to think that ham radio equipment is
even on the radar of anybody's 'essential' industry.
What's even weirder, is that if you ask anyone to make up a list of
'essential'
Just curious and a bit too busy to go look it up right now, what is the
AUX jack for on the back of my K-POD?
73,
Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County
On 7/17/2020 7:08 AM, Dick Dievendorff wrote:
My K-Pod, an early one, has a rear-panel USB-B connector labeled "USB", used to
Interesting discussion:
But most of us probably tune our antennas for best SWR at the desired
frequency.
I have a dual-band 80-40m inverted-V with apex at 40-foot and 80m
wire tail at 20-foot. The separate 40m wire is spaced 6-inches from
the 80m wire with wooden dowels. I found by
Geez! Where's the courtesy?
Marv
KG7V
-Original Message-
From: elecraft-boun...@mailman.qth.net On
Behalf Of JP Douglas
Sent: Friday, July 17, 2020 10:09 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Joke status wasn't wasted on me
What does this have to do with
What does this have to do with Elecraft???
Please do not waste my time!
Thanks!
Jose Douglas KB1TCD
On 7/16/2020 7:12 PM, Rose wrote:
On Thu, Jul 16, 2020, 16:59 Fred Jensen wrote:
Yes, I too have a math degree and the mean population density of
California is ~98/sq km and yes, all the
I always felt that the ALC control into an SS amp is the amp's last resort
to being over-driven (= damaged?).
Yes, for normal operation, set your radio at a lower power to drive the amp
to the desired level, which does NOT activate the ALC.
However, if you do something "un-smart", the ALC will
Here's a link:
https://birdrf.com/en/Products/Test%20and%20Measurement/RF-Power-Meters/Watt
meters-Line-Sections/RF-Wattmeters/APM-16_Average-Reading-Power-Meter.aspx?g
clid=CjwKCAjwmMX4BRAAEiwA-zM4JtuO8sbzCsjg_4apIkPk8IlF48EXdqyoJq9us9FipBHUCqY
DySso8xoCU3cQAvD_BwE
-Original Message-
I've upgraded both of my K3 while ago with all parts available to make
them K3S (more or less).
My main K3 shows some weird behavior with the audio level comparing left
and right stereo channel (KIO3B). I'm feeding this K3 mainly with 144
transverter signals from XPol yagis (moonbounce
I have an immaculate Bird APM-16 Average Reading RF Power Meter with several
elements and carrying case, which I no longer (and hardly ever did .) need.
If interested, PM me.
73
Lyn, W0LEN
__
Elecraft mailing list
Home:
If you want to pick nits then even a "perfect" dummy load doesn't match a
practical transmission line which has loss, hence has a reactive characteristic
impedance. :-)
Wes N7WS
On 7/16/2020 3:32 PM, donov...@starpower.net wrote:
Ken's statement that " a non-resonant antenna can have a 1:1
Yes, an RJ-12 cable for a K3, a USB cable for a K4.
73 de Dick, K6KR
From: hawley, charles j jr
Sent: Friday, July 17, 2020 07:23
To: Dick Dievendorff ; Eric Norris
Cc: elecraft@mailman qth. net
Subject: Re: [Elecraft] K-POD Coiled Cord?
Oh...not the same as the K3 6 pin
Oh...not the same as the K3 6 pin connectors?
Chuck Hawley
c-haw...@illinois.edu
Amateur Radio, KE9UW
aka Jack, BMW Motorcycles
From: elecraft-boun...@mailman.qth.net on
behalf of Dick Dievendorff
Sent: Thursday, July 16, 2020 10:00 PM
To: Eric Norris
Cc:
My K-Pod, an early one, has a rear-panel USB-B connector labeled "USB", used to
install K-Pod firmware and also for a K4 connection. K-Pod DC power is also
provided through this cable.
I use a very standard USB A to B cable.
73 de Dick, K6KR
-Original Message-
From: Nr4c
Sent:
db 15 or db9 ( DE9)
On 7/17/2020 9:20 AM, Bill Cotter wrote:
Somehow in the entropy of the universe and my cluttered shack/shop, I
have managed to lose my KUSB cable for my K3. I found the earlier
(silver) cable, but it doesn't have the FTDI chip and won't work with
Win-10. In the process
heck for 13 $ you can get another usb rs232 ftdi cord
Sabrent USB 2.0 to Serial (9-Pin) DB-9 RS-232 Adapter Cable 6ft Cable
[FTDI Chipset] (CB-FTDI)
Not an operating question.
Didn't use a counter...was actually trying an old BC-221 frequency meter and
wanted a quick indicator of drift.
I made my estimate using the Pitch setting...changing pitch and retuning.
Also moved signal and retuned to return CWT to middle, then read freq increment
*IF* the user can remember to turn the exciter power level down before
turning on the amplifier, ALC is not necessary. However, it remains the
only failsafe way to prevent damage to the amplifier from sustained
overdrive. Given the cost of replacing transistors in the amplifiers,
I would
Bill,
I haven't looked into the electronic validity of what you are asking but I
would recommend building an adapter with a female jack and DB-15 vs cutting
off a working connector.
Ken
WA2LBI
On Fri, Jul 17, 2020 at 9:21 AM Bill Cotter wrote:
> Somehow in the entropy of the universe and my
Somehow in the entropy of the universe and my cluttered shack/shop,
I have managed to lose my KUSB cable for my K3. I found the earlier
(silver) cable, but it doesn't have the FTDI chip and won't work
with Win-10. In the process of searching for the KUSB I have
managed to unearth two KXUSBa
Every amp that I use I would overdrive with the Elecraft set at 100
watts. I am not familiar with the Quadra, I typically adjust the PWR
(power output) control to the desired wattage and have not had an
issue with any that that I have used. I see a lot of talk about using
ALC on the SPE
I'm sure that it varies by location and industry. I have spoken to several
businesses who report they are behind due to supply chain interruptions and
delays.
I see that I need to change my habits for this mailer...I have a habit of
hitting reply, and twice now I have sent private messages
Guys
Just wanted to say how much I appreciated the help of Don after I killed the PA
and bias transistors on my K2 recently.
Unexpected, but Elecraft (Don in this case) was right on the case with years of
experience on tap, a real guy, not some software query guessing service - don’t
you love
Skip
Was any attempt made to redress the imbalance?
David G3UNA
> On 17 July 2020 at 03:19 Fred Jensen mailto:k6...@foothill.net > wrote:
>
>
> They were around somewhat before the patent in several forms, and they
> were around in 1960, which is the last time I looked hence my
I use "Plasticene" (maybe known as modelling clay?)
In my experience it never hardens, it is waterproof and easy to remove. I
used to use the orange tapered vinyl boots that were used on mineral
insulated "Pyro" cable over the top since they are a great seal over PL259s
but I have used up my
It will fit our existing K-Pods??
Sent from my iPhone
...nr4c. bill
> On Jul 16, 2020, at 11:56 PM, Dick Dievendorff wrote:
>
> The K4 uses a USB cable to the K-Pod rather than the telephone like cable
> used with K3. There are USB-A jacks on K4 front and back, not underneath
> like the
ALC is not needed if you set the K3 to 60w (or whatever the appropriate
drive is for each band) using the K3's per-band option.
Using ALC to control the drive will also introduce distortion.
The only disadvantage of the per-band power setting is that if you want
to run more than 60w when
I took great care in the construction of my rotary dipole and feed
system to make it as balanced as possible. I made a clamp-on device from
a split ferrite bead that I can use to measure the relative currents in
the open line conductors, and they are very close.
There is one direction in
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