If everyone was able to call exactly zero beat with the DX station you can be
sure that I would not. I would be the only one readable. (CW)
-Robby
VY2SS
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Richard,
The problem brought up on the reflector implied that the operator had
to continuously adjust the spot level in order to zero beat - it helps a
lot if the spot tone and the signal are at about the same volume.
It is easier to adjust the AF gain to change the level of the received
Bob,
The levels measured at U11 and U12 under such strong signal conditions
are a bit confusing.
Do you have AGC turned off? If not, the gain of U12 is being reduced
dramatically.
Since you are working on an early level of the manual, check the turns
ratio used for T7 - the better ratio is
During the CQ 160 contest, I found myself leaving the APF on and using
that on top of a .4 KHz DSP bandwidth. Signals just jump up as you tune
across, making zeroing easy even for someone like me that has very
little tone discrimination ability. Of course, I got used to doing this
with a
Yeah, that's what is happening with the skimmers
Fred. KE7X
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Robby.VY2SS
Sent: Tuesday, February 01, 2011 5:52 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Zero
~
N2CQ QRP CONTEST CALENDAR
February 2011
~
80 METER FOXHUNT (CW) *** QRP Contest ***
EST: Feb 1, 9 PM to 10:29 PM
UTC: Feb 2, 0200z to 0329z
Info: http://www.qrpfoxhunt.org/
I agree, but I would say that the tasks aren't entirely different. While only
the sidetone provides the monitor function, BOTH give you the pitch required
for zero beat. The spot tone just allows you to hear that when you're not
transmitting. (This is true only of rigs with tracking
Not really. Spots typically are to the nearest 100 Hz, whether coming
from Skimmer or traditional DX cluster users. The only thing that's
different is that the random human errors are eliminated, or rather
replaced by Skimmer erros, which happen rather less often.
The wild thing about
The K3's APF feature formalizes behavior that I used to implement by mixing
the audio from the main and second RX with the two receivers set to
different IF and DSP bandwidths. The first few times I tried the APF, I was
not impressed; I thought (mistakenly) that it was not meant to work with
the
I am still a new K3 user and learning the radio. I have looked through the
manual a couple of times and I cannot find out how to turn APF on. I must
be missing that. It sounds like a useful feature and might help pull VP8ORK
out of the noise.
73,
- Craig, AE6RR
K3 #4877
-Original
Band condx aren't the best. But if you've wrkd them they weren't
very strong thank those K3s. Every evening there's a 6 kc wide CW pile
up of callers on 160m,80m 40m. Most of the world calling them. I've
managed a few Qs. On 15m SSB they were 53 but they hrd me. One K3 to
another Hi!
My mistake: Eric is a great guy, but credit for this post goes to Wayne,
N6KR:
See: http://elecraft.365791.n2.nabble.com/Tips-for-using-APF-td5964773.html
My apologies to Wayne!
--
73 -- Brian -- K1LI
On Tue, Feb 1, 2011 at 12:43 PM, K3RWN rwnewbo...@comcast.net wrote:
Can you help me with
The P3 display of the calling mob is spectacular! (:-)
73! Ken Kopp - K0PP
elecraftcov...@gmail.com
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Post:
Advice/experience will be appreciated.
I have an upstairs shack (ugh) with much RF. Tried to earth without much
luck. Should use a balanced antenna, but.
I have a windom antenna cut to 20%x80%, overall length 136 feet; used for
80-thru-10 meters. It is fed with vertical twin lead for
Anyone know if there is/are droid apps available like the one(s) used on the
iphone ones used to carry K3 manuals?
Thanks es 73, de Jim KG0KP
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Help:
Not really. Spots typically are to the nearest 100 Hz...
Really. Whatever frequency the spots report, EVERYBODY (well, almost) calls
on that freq., whether that is my exact frequency or not, making them
impossible (well, almost) to differentiate. THAT'S the problem.
I daresay most of us
Jim,
Copy the PDF to your Android phone and you can read with PDF viewer. No
special app needed that I am aware. I do recommend placing the file in your
storage chip to save space on the phone itself.
Bill
K9YEQ
-Original Message-
From: elecraft-boun...@mailman.qth.net
Don,
AGC was on, T7 is 5:20, crystals are the -S flavor.
With a -130 dBm signal, Spectrogram shows the signal about 20 dB above the
noise floor, so I guess I have nothing to worry about. Can easily hear the
signal with headphones. This graph is with AGC on, and the AGC off chart
looks about
Not really, it's just the way we do it. Years ago, matching frequencies meant
literally listening for the zero-frequency beat. It was always difficult,
because the audio response of any receiver, as well as that of the human ear,
drops off at low frequencies. Now you can achieve the same
Current practice seems to be:
1. Click on the receive frequency of a spot.
2. Tune up at length on that frequency.
3. Warm up your fingers sending.
4. Then listen, maybe.
This practice really makes me appreciate the low power, seldom tune
features of my K3. I've actually had to tune the K3 on
Hi you all!
I'm using my k3 in digimodes connected to a Mac Mini with XP Pro virtualized
in order to execute Ham Radio Deluxe. As this pc has no rs232 interface I'm
using,of course, adapter (Keyspan in my case because I heard it's one of the
few OSx certified). For AF and PTT I have a Signalink
Larry,
The signal in that long cable that is likely to prove troublesome is the
AUXBUS. It is a one wire communications signal path for all the
microprocessors in the K2 system. If the main MCU sends out a query, it
expects a response in a given number of microseconds, and if that
Bob,
Yes, that seems quite good.
On your transmit problem, count the turns on the toroids in the Low Pass
Filter. Count the number of times the wire passes through the center of
the core. Many builders do not pick up on the fact that a straight wire
through the core is one turn while a
What I should have explained ... is that I find when I jump to a Skimmer
spot that it is rarely in genuine zero-beat, so I typically tune
manually before calling. In any case, I usually don't have much
competition (unlike traditional packet pileups because I get there early.
73, Pete N4ZR
I worked them during the qrm height of the CQ160 contest, using a K3 of
course, but even that would not have been possible without propagation
existing like Bill said.Best propagation to the NE region appears to be
around the 0400 to 0500 time frame although they have been heard and worked
by the way I wonder, without having a certain indication to trust right
now, what should be the suggested maximum RF power in PSK and RTTY , without
taking the risk of stressing finals. Could you give me an indication ?
Normally I stay at 40-45 wI feel (or better I hope) that's ok
Many
I have a miniVNA analyzer.
I followed the transmitter troubleshooting procedure and it warned me not to
skip the receiver procedure, which is how I ended up at the 2nd crystal
oscillator. Since I have a good -130 dBm receive signal, can I assume that
the low output from the 2nd crystal
I've been requesting separate Sidetone and Spot volume controls since my K3
(#1001) was new. My Omni VII has them and it is very convenient. Even
though the volumes are identical on the K3, it doesn't seem like
it---perhaps because the Spot tone is heard amidst band noise and other
signals.
Well, it's not tuning to have the tone go to zero cycles, it's tuning to
have the BEAT between the two tones (from your vfo and his transmitter) go
to zero. Like tuning him in at a tome of 400 cycles, then adjusting your
VFO until it was 400 cycles, not 403 or 402, which makes a wah-wah sound
at
Nooo! If you served on an aircraft carrier for three years, with
Navy jets literally landing on a 13-inch thick steel deck just seven feet
above your bed, there are a LOT of things you cannot hear anymore and
matching audio tones is one of them!!
There are exception to every One can
Exactly. The receiver is muted on transmit, so it's much easier to hear the
sidetone.
Scott K9MA
On Feb 1, 2011, at 3:31 PM, Gary, W7TEA wrote:
Even
though the volumes are identical on the K3, it doesn't seem like
it---perhaps because the Spot tone is heard amidst band noise and other
PSK is a low power mode- 40-45 watts is overkill to say the least -
20-25 is even strong. QRPers run 5 watts or less quite successfully with
PSK.
Dan - KI4YZE
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of ik1bxn
Sent:
The So. Orkney micro-lite DX-pedition must be using a K3 on 160M. They heard my
barefoot K3 so they must have had the APF feature on. I needed to turn on APF to
hear them on the Topband. VP8ORK was DXCC country #222 on 160M with 100 Watts.
My antenna is an Inverted-L (30' vertical, 100 ft
Bob,
I certainly can say that any measurements made at the 2nd crystal stage
and the product detector would have no effect at all on transmit current
draw.
How much current is it drawing? Many K2s will develop 16 or 17 watts of
power, and if you are making your current draw judgment based
Robby,
There are some secrets that should be kept secret (HI) ;o)
Joe K2UF
No trees were harmed in the sending of this e-mail; however, many electrons
were inconvenienced.
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of
45 watts might not be so bad from Italy on PSK, and certainly wouldn't be on
RTTY.
73,
Don, WB5HAK
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I have a loud birdie at 28.020 MHz on my K2/100. The KPA100 is integral to the
K2. I thought it might be from the 4.0MHz oscillator on the KPA100, but the
birdie does not respond to changes of C27. The birdie stops when the power is
reduced to low power mode. The birdie is loud...can be heard
OK guys I've tried everything to no avail. The DM780 demodulates CW, PSK,
etc fine and I can get the frequency readout and all the K3 button are
displayed
on DM780 but I just can't get the Keyboard CW to work. I did program
the M1-M4 memories on the K3 and was able to activate them from DM780.
Thanks to all the replied offline.
I now have the latest manual (D9 version) and the release notes for the
firmware. Let's see if it helps my pull VP8ORK out of the noise on 80m
tonight.
I did work them on 40m CW and SSB last night with the K3 and an ALS-1300
amp.
73,
- Craig, AE6RR
John,
Have you tried setting the K3 to CW mode? DM780 sends KY commands over
the RS-232 interface, and the K3 does not know how to respond to them
unless it is in CW mode.
73,
Don W3FPR
On 2/1/2011 8:33 PM, John Santillo wrote:
OK guys I've tried everything to no avail. The DM780
Giorgio,
The safe power for the K3 is 100 watts. A operator using more than 20
to 50 watts for PSK31 is IMHO a band hog - PSK31 operation at QRP
levels is quite common and should not be abused by those running high
power (even though many do it).
OTOH, RTTY is different because many
Yes, I have the radio in CW mode.
John
-Original Message-
From: Don Wilhelm [mailto:w3...@embarqmail.com]
Sent: Tuesday, February 01, 2011 8:49 PM
To: John Santillo
Cc: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Keyboard CW with HRD and DM780
John,
Have you tried setting the
You may be quite right, Tom. Many of us have various levels of hearing loss.
However, the red flag that causes people to say things like that is the
use of the phrase matching tones.
There is *no* matching tones in the process of zero beating, which gives
the impression the person is trying to
Ron,
You are quite correct, but it is not all hearing loss, it is a case of
tone perception, and some of us are tone-deaf even without hearing
loss. Many suffer from tone-deaf problems. I used to break guitar
strings because I could not determine if I should tune it higher or
lower - I
I just carry the pdf files on my droid x. Works we well. Zoom in as needed.
Adobe search, etc.
Jim K0XU
Sent from my Droid X
On Feb 1, 2011 12:43 PM, Jim Miller KG0KP jimmil...@stl-online.net
wrote:
Anyone know if there is/are droid apps available like the one(s) used on
the
iphone ones used to
Larry, I have had the same setup at two different QTHs. With some wrangling,
you can get the RF under control.
The place to put the balun is right at the window. Run coax from the balun
to the transceiver, and put a line isolator (available from
http://www.radioworks.com/) or some other version
You might find some helpful information in
http://elecraft.365791.n2.nabble.com/K2-KPA100-birdie-at-21029-tp5972747p5972747.html
this recent post.
- Bruce
-
Bruce Rosen
K1FFX
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I am using a 50-ohm Relm dummy load. My Astron power supply is set to 14.0
volts, which is what I remember reading somewhere in the K2 manual. At 5
watts power, the K2 was shutting down.
At 2.0 watts, the current is 1.5 amps and the voltage drops from 13.8 to
13.4 per the internal voltmeter.
There is certainly no arm chair copy of these guys and the pileups are
just mad. Prepare to spend some time if you really want to work them. I have
5 contacts with them and every one took hours of careful hunting. I doubt I
could be able to do this without second receiver. They use very wide
Good for you that they had an ACOM amplifier otherwise you
wouldn´t have worked them. Instead you should send a thank
letter to ACOM.
Jim SM2EKM
On 2011-02-01 23:54, Rich - K1HTV wrote:
The So. Orkney micro-lite DX-pedition must be using a K3 on 160M. They heard
my
I didn't realize that an ACOM amp could make you receive better. Have to
look into that;-)
On Tue, Feb 1, 2011 at 11:21 PM, Jan Erik Holm sm2...@telia.com wrote:
Good for you that they had an ACOM amplifier otherwise you
wouldn´t have worked them. Instead you should send a thank
letter to
Thanks you all for clarification (fast and shape response as usualthat's
wonderful)! 73 de Giorgio
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