Hi
I have used these 4 coil steppers in a auto tuned amplifier.
The really simple way is to use a BASIC Stamp with a ULN2803A motor
driver chip. Have a look at page 99 of the BASIC Stamp Programming
Manual 1.9 .
I used steppers salvaged from a fax machine.
All the driver pulses are generated
Hi,
I bought a 180W version of the AN762 from
Communication Concepts for my K2. I also bought the
filter set for it. It works like a dream! I can now
easily disconnect my K2 from it and go QRP.
YES the company is a BIT slow on responding to
e-mails. So call them! Or FAX them! They are there and
I suppose it had to happen sometime.
I've been testing some K2 software which operates the rig on tx and using it
with a dummy load which is a very old ethernet 50 ohm bnc terminator. It got
a little warm at 1 watt, but I inadvertantly ran it overnight at 10 watts.
This morning, the dummy
For test i sent them e-mail yesterday again and recieved an answer in 1 hour
(wow).
Maybe they read this reflector.
Did You purchased also the LP filters for the six bands?
Thanks for answer!
S55M-Adi
- Original Message -
From: Michael Johansen [EMAIL PROTECTED]
To:
Hi James,
Yes, Elecraft is clearly the plan B. It is bad enough to have to hunt for the
key to my wallet - but to pay for the shipping from US for a $2 item requires a
lot of Tylenol and long-term psychiatric therapy.:-)
Regards
Tony
G7IGG
___
Vic (and others)
I use both stepper motors and selsyns here for remote
tuning applications.
I prefer the selsyns, but they are harder to come by.
Besides the simplicity and torque, the selsyn has the
advantage of haptic feedback.
By far, the smartest way to turn a stepper is found in
this
Would be nice to have some kind of control to vary my vacuum variable cap on
the shunt fed tower for 160M. A control like I have for my Vactrol's on the
pennant antennas would be nice. I have the pot marked for 160, 80 and 75M.
These settings correspond to the best F/B. Would like to use a similar
The list server just rejected one of my postings because:
Diagnostic-Code: smtp;550 Error: 554 SPAM-ID: B0008 - Your message
looks like spam.
I have no idea why my reply to another posting looked like spam, but
there is no excuse for some brain-dead piece of software rejecting posts
to a
Chris,
No, No, Belle Isle is located in the Detroit River between Detroit,
Michigan and Windsor, Ontario, Canada
73, Bob VE3XM
K2 S/N 02676
K2/100 S/N 04031
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If one is in the business of building boards commercially, a fillet is
expected as a sign of an acceptable joint.
Does it matter? I don't know, but I suspect if it didn't, then most
of industry wouldn't care about it as much as they do.
My .02 and worth every penny!
John
I never noticed this until you pointed it out!
;-)
You want the solder to be at the same potential as the
ground of the circuit board it would seem to me.
Bob
N4HY
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of [EMAIL PROTECTED]
Sent: Thursday, March 31,
[EMAIL PROTECTED] wrote:
If one is in the business of building boards commercially, a fillet is
expected as a sign of an acceptable joint.
Does it matter? I don't know, but I suspect if it didn't, then most
of industry wouldn't care about it as much as they do.
My .02 and worth every penny!
started the build on k2 #4857 yesterday.
this should be enough incentive to learn code
ron kc0tdj
an old heathkit junkie
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Just had a QSO with F6FBN, André in Brest, who answered my CQ and we
both worked with K1:s. The funny thing is that my K1 is #1992 and his is
#1993...
Now that´s a coincidence, isn´t it? Hi!
Hans / LA2MOA
K1 # 1992
KX1 # 975
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~~
N2CQ QRP CONTEST CALENDAR
April 2005
~~
ATLANTICON - Apr 1-2, 2005
Info: http://www.njqrp.org/
~~
SP
I was a certified NASA solderer, and no NASA soldering course I ever took
required fillets...It was quite the opposite, minimal solder was required in
the interest of saving lift-off weight...It was estimated that minimal solder
in the Apollo program saved 450 pounds in entire launch
K2 s/n 4846 powered up last night and aligned with few
problems. Actually the radio was fine, the green
tuning tool on the small end had to be trimmed back to
a thicker part of the tool and then cut down in width
to provide a stronger point. As received I couldn't
turn the coil cores with the
k2 #4847 build is going well. Will have to change L31 to increase PLL
range. Otherwise, all tests so far right by the book. Sorry I waited so
long to get a k2 to build.
Pete AG7C
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You
Hi Jon,
13.31 kHz is OK. The manual is overly conservative. I think we mention this in
the errata and on our builders web page at:
http://www.elecraft.com/Apps/K2info.html. But in any case, we allow for up to at
least 18 kHz max PLL ref range.
73, Eric WA6HHQ
jon howe wrote:
I have made
On Thu, Mar 31, 2005 at 01:35:44PM +0100, Julian, G4ILO wrote:
The list server just rejected one of my postings because:
Diagnostic-Code: smtp;550 Error: 554 SPAM-ID: B0008 - Your message
looks like spam.
I have no idea why my reply to another posting looked like spam, but
there is no
Hi Julian,
I apologize for the inconvenience on this.
Unfortunately this is a requirement for Internet email list servers these days.
We get hit by literally hundreds of real SPAM messages daily and can not look at
each one manually. If the list engine didn't catch them the list would be
On Thu, Mar 31, 2005 at 07:53:07AM -0500, Robert C. Abell wrote:
Chris,
No, No, Belle Isle is located in the Detroit River between Detroit,
Michigan and Windsor, Ontario, Canada
Some îles are melleur belle than others.
73, Bob N7XY
Bainbridge Island, WA (NA-065)
In any case, whenever anyone gets incorrectly rejected as SPAM by the list
server, just email a copy to [EMAIL PROTECTED] with a short
note
and we will post it for you.
Not to belabor the point but we should be happy that the list tells you your
post is spammy so you have a chance to try
Tony
Here is one idea.
I use a reversible geared down 12v dc motor to turn my tuning cap at the
base of my
vertical. Typically I peak the vertical at either 1815 kHz or 1845 kHz. I
have to tune
at low power and watch the swr meter for a minimum.
For the coming winter I'm going to build a noise
I have a fully loaded K2/100 for sale. This radio has the 2.6KHz SSB, noise
blanker, 160 meter/external Rx in, 60 meter/transverter interface, audio
filter/clock and 100 watt amplifier. All of the current mods have been
installed and the latest firmware. The serial number is 3132 but it is
And while we're on the subject... the correct unit is dB, not dBm.
Remember that dB is a relative term. In the case of amplifier gain, this is
relative. The unit dBm is an absolute unit relative to 1 milliWatt. When the
amplifier is finally built, it will have 50 dBm of output power (assuming it
Now that I have my K2 fully stuffed with goodies... DSP, NB, ATU, Battery,
SSB, 60M, 160M, IO... I got busy on transverters... and have all 3 working...
but...
I plan to use the K2 and transverters, portable, for the June VHF contest. I
use M2 HO loops for the low gain stack to allow quick
Posted for Julian (Our SPAM engine caught him..)
Eric
---
Subject:RE: [Elecraft] Should You Built It? Not necessarily
From:Julian, G4ILO [EMAIL PROTECTED]
Date:Thu, 31 Mar 2005 12:05:10 +0100
To:Elecraft List elecraft@mailman.qth.net
Perhaps bonding is the wrong word. But when you build a radio
Hi Greg,
Because of the high power and close proximity of the antennas there is
probably considerable out of band power being applied to the LNA input. It
is difficult to suggest what is needed to alleviate the problem. Do you
have some means of measuring the power at the XV50 input when
No.
Doug
W6JD
- Original Message -
From: w2bvh [EMAIL PROTECTED]
To: [EMAIL PROTECTED]; Elecraft@mailman.qth.net
Sent: Wednesday, March 30, 2005 5:11 PM
Subject: [Elecraft] Logging 4U1WB
Hi
My (approx 5 year old) countries list from ARRL lists 4U_ITU (the ITU)
and 4U_UN (the UN)
Gregory,
Not inexpensive, but works well:
http://www.dci.ca/
Specifically:
http://www.dci.ca/?Section=Amateur
We installed one of the 2M units on our repeater to eliminate bandpass and
to give a DC ground to our preamp on our repeater system. It was
intolerant of the energy from
Bob,
You may be able to attach a pot to the capacitor shaft
somehow and pass a voltage to a meter. You already
have a voltage at the motor, the rest is probably in
your junk box already. Tune up and note the readings
at each frequency of interest, then just drive back to
the appropriate setting.
I'm in the process of aligning the transmitter on my K2 #4778.
The manual says to peak pairs of slug tuned coils and variable
capacitors on the various bands, with the power control set to 2.0
watts.
There is no peak as I dial the slug tuned coils around -- just an
increased power in one
You have to leave tune mode, and reenter tune mode occasionally to get the
power to reset. I believe the book says 10 seconds for thermal reasons.
Anyhow, just iterate between the two, going against a stop if that's the
max, until you get the best you can get. It probably won't be against either
Hi
Re-adjusting the power control knob a little will also make the K2
re-measure the power out. As you are adjusting the slug in the coil just
move the power control and the power will return back to the 2 watt level.
This is faster and easier than going out of then and back into tune.
Don
Andrew,
Most of the bandpass filters tune properly with the inductor slugs between 1
1/2 to 4 turns into the coil. If your adjustments are so far out of range
that the slugs are either at the top or bottomed out you have a problem.
The problem is either 1) The capacitors in the bandpass filter
Bob
I have an HP435A power meter, I'll look at how much signal shows up on
the 6 meter antenna tonight I expect it to be big, probably more than +20
dBm with +52 dBm comming out of the 2 meter amp. The 6 meter loop probably
works pretty good close to 3X it's design frequency, and only a
Greg,
Once we know what we are dealing with then we can work out a solution. It
could be as simple as an external lowpass filter. That would be nice
because the loss would be very low.
Bob
- Original Message -
From: Gregory P. Daly [EMAIL PROTECTED]
To: Robert Friess [EMAIL
Thanks List -- tx successfully aligned.
Proceeding with final assembly.
--Andrew
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I was a certified NASA solderer, and no NASA soldering course I ever
took required fillets...It was quite the opposite, minimal solder was
required in the interest of saving lift-off weight...It was estimated
that minimal solder in the Apollo program saved 450 pounds in entire
launch
In a message dated 31/03/05 19:42:07 GMT Daylight Time,
[EMAIL PROTECTED] writes:
Not inexpensive, but works well:
http://www.dci.ca/
Specifically:
http://www.dci.ca/?Section=Amateur
We installed one of the 2M units on our repeater to eliminate bandpass and
to give a DC ground to our
Hi all,
It is maybe a silly proposal, but is there any KX1 owner, or better a owner
of an unbuilt KX1, that wants to make a deal with a Yaesu FT817? My FT817 is
in very good condition and has the narrow CW filter, but is surplus to my
needs.
Best 73, Dick PA2DW
K2 s/n 3892
And an FT817 ;)
Bob:
A simple low pass filter would be nice, but it might not cover all cases.
Eventually I'll be able to make max legal power on all bands, and I might find
myself in a situation where the lower frequency signal damages the higher
frequency transverter. At the moment, I'm only talking about
I've been meaning to ask about this for months. Not continuously, but
consistently, there is a CW signal which just sends the letter d over and
over, with an occasional other letter. This goes on day and night literally at
any time. Now today at about 7038 I hear my old d friend, and now
V Cortina wrote:
Not continuously, but
consistently, there is a CW signal which just sends the letter d over and
over, with an occasional other letter. This goes on day and night literally
at any time. Now today at about 7038 I hear my old d friend, and now
somebody else at nearly the same
V Cortina wrote:
I've been meaning to ask about this for months. Not continuously,
but consistently, there is a CW signal which just sends the letter
d over and over, with an occasional other letter. This goes on day
and night literally at any time. Now today at about 7038 I hear my
old d
Hi All,
My K1 is out traveling with me, getting a lot of low sounding distortion
(hum) and key clicks when sending.
This radio is a used one I picked up on ebay and seemed to work OK at home.
BTW at home I was using my bencher paddle, now I'm using a new PAL I
purchased.
Bob KC8IPQ
Hi All,
Yesterday I finished assembling my KX1 SN 1069 and
everything works or so it seemed.
In testing the receiver it heard a signal on 40 meters
at .1 uV well and on 20 meters it was a bit less
sensitive at .2 uV. As receivers go, not bad.
In testing the transmitter it too worked but here
Hi,
One of the relays in my KAT2 is stuck or a relay contact is shorted. When
you select antenna 1 it is ok. When you select antenna 2 both antennas are
selected (bad), and the indicator stays on Ant1. I guess replacing the
relay is necessary. I don't know why it stuck. I first noticed it
In a message dated 31/03/05 23:06:29 GMT Daylight Time, [EMAIL PROTECTED]
writes:
I'm thinking external T/R relay is the smart move. If the relay is rigged
to rest in the transmit position, when the transverter is powered off, the
out
of band signal will land in the PA output, I suspect
Chas,
Look for a short between either pins 2 and 3 or pins 8 and 9 of KAT2 K18.
As you have concluded, a short batween those points or a faulty relay is the
only thing that could allow output on ANT 1 when ANT2 is selected.
But OTOH, if the indicator says ANT 1 in all cases, that indicates a
K2 4790 with SSB and KAF2 is up and working very well. I have noticed
something with the Test/Operate function which I'm not sure is a
defect, a quirk, or a feature of the firmware.
On CW if I select test mode by pressing VOX the c indicator flashes
slowly to indicate that the unit is in test
Craig wrote:
On CW if I select test mode by pressing VOX the c indicator flashes slowly
to indicate that the unit is in test mode, per the manual.
Pressing the Tune button apparently starts the tune mode but the power
indication is just 0.1 to 0.2, indicating no rf output. That's all fine.
There are parallels here to two-radio operation for radiosport at lower
frequencies.
Bandpass filtering not only keeps dangerous energy from blowing
things up, but also makes it possible to operate on 1 band
simultaneously, not hear phase noise from the other rig, etc.
And unless VHF activity
On page 41 of the manual for the KPA100 is a
resistance table. I have some readings I would like
to inquire about.
Q1 Q2 collectors should be 10k. My readings start
at several megohms and after 30 + seconds it slowly
falls to about zero ohms. If I put the DMM on auto
ohms once it reaches zero
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Help:
Dave Anderson, K4SV wrote:
Hi All,
In testing the transmitter it too worked but here is
my problem. With a 12 volt external power supply I am
only able to get 2.5 watts out on 40 and almost 2 on
20 meters. No, the power does not sag.
I also had low power on KX1 #1056 pretty much the same
KAT2 manual, Rev D, March 22 2001:
Page 6 instructs me to install standoffs at each end of the Control
board -- on the component side -- with the split lock washer between the
standoff and the PC board, and screws coming up from the non-component
side:
I standoff
I
I
-- lockwasher
PC
What is the value of R30? If you change out this 22 ohm resistor with a 33
ohm resistor you should see an increase in power out. Mine also had low
power TX but after this mod it is up to where it should be. Check out the
archives from this reflector on low power on the kx1 for more discussion on
Weather and propagation permitting, we will attempt to activate an
Oregon lighthouse, or two, tomorrow April 1st. This is a tenative
operation, dependent on reasonably good weather, and not an April Fool's
joke.
Not sure which one yet. All operations will be on standard ARLHS and Ten -
Ten
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