I could copy Tom on 20, but couldn't break the pileup trying to check in.
He might have answered my AC, but there were so many tail enders on top
of his replies that I couldn't tell. He was about QSA4. From here it sounded
more like a single-frequency DX pileup than a net, Hi!
The phone rang
wayne burdick wrote:
Even though the code is well-documented, I'd want to create
theory-of-ops and maintenance documentation before I tried to hand it
off to another programmer. This is often necessary for projects where
you don't have the luxury of writing everything in an encapsulated,
Bill, in AM, try tuning 1-2 KHz higher or lower than carrier frequency.
Works
for me (more highs) cuz I have only a 2.8 KHz filter for other-than-cw
modes.
73 Dave W8FGX
Guys,
Just got done assembling my second K3 and this one has a 13 Khz
SNIP
--
View this message in context:
I wonder if two K3s could be interconnected so as to get two
front-panels-full of first and second rcvr controls. Maybe much more.
You know, sorta like the old Drake R4/T4X twins I occasionally miss a
little, or that homebrew transceiving adapter for the 2B and HT32 which I
don't miss at all,
Take any SWR meter and insert it at different locations along the length of
the feeder
and you will get different readings.
Other than SWR reduction due to cable loss, the SWR meter should read the
same SWR regardless of where it is on the coax. Picture the constant SWR
circles on a Smith
After 5 months use my K3 has developed an output problem. The output varies
on tune or key down. If it is set on 100 watts, say on 20 meters, the out
put will start at 65 watts. It then goes up to 110 and settles at 100
watts. All this is in a span of about two seconds. It does the same at five
Ric Porter wrote:
After 5 months use my K3 has developed an output problem. The output varies
on tune or key down. If it is set on 100 watts, say on 20 meters, the out
put will start at 65 watts. It then goes up to 110 and settles at 100
watts. All this is in a span of about two seconds. It
Phil
I agree concerning the swr being the same anywhere on the line but that's
not what I said. I said you will get different readings.
Now I'm sure there's plenty of reasons why we get these different readings
and it's likely due to the meter design but the fact remains.
One thing I've learned
- Original Message -
From: Steve Ellington n...@carolina.rr.com
It appears that your coax does not exactly match the impedance of your
dipole (It rarely does)
-
Thank you Steve for your comments. I fully accept about a probable mismatch
between
Geoff,
I experience the same issues between my factory aligned K3/100 (#474) and my
LP-100A (aligned by Larry at Telepost, Inc). Firmware 3.11 here as well.
Terry, W0FM
-Original Message-
From: Geoffrey Downs [mailto:geoff...@downs.globalnet.co.uk]
Sent: Sunday, May 03, 2009 6:12 PM
Oliver
I guess Elecraft will have to answer this one. Let us know what they say.
Steve Ellington
n...@carolina.rr.com
- Original Message -
From: orbarrett hoosa...@hotmail.com
To: elecraft@mailman.qth.net
Sent: Monday, May 04, 2009 12:39 AM
Subject: [Elecraft] K3 on-channel strong signal
Hi All,
You may have noticed the K3 SSB RX audio/noise-character discussion some
days ago.
I got a lot of very interesting feedback on this,also in direct mails, and
some people thought it would be interesting to compare different
brands/models in their SSB RX audio/noise character.
If you have
Other than SWR reduction due to cable loss, the SWR meter should read the
same SWR regardless of where it is on the coax.
Some reasons for changes in indicated VSWR as measured at different points
along the line:
1) Line loss. As line loss increases, VSWR will show a better reading
closer
Geoff
Try putting a 50 ohm dummy load in line and see if the K3 and your ext.
meters read the same swr. This will take reactance and inbalance out of the
picture.
Steve Ellington
n...@carolina.rr.com
- Original Message -
From: Geoffrey Downs geoff...@downs.globalnet.co.uk
To:
I have had some similar observations on ten meters. After reading your report
I am inclined to agree with you. I have a station about 5 miles away who I
contact on a regular basis on 10 meters, both SSB and CW. He is usually very
distorted here and I have not been able to understand because
I wonder if this could be caused by the TR switching diodes?
Steve Ellington
n...@carolina.rr.com
- Original Message -
From: WILLIS COOKE wrco...@flash.net
To: orbarrett hoosa...@hotmail.com; Elecraft Reflector
elecraft@mailman.qth.net
Sent: Monday, May 04, 2009 11:51 AM
Subject: Re:
I don't think front end overload is your problem. I've had S9 + 45db
signals sound perfectly fine on my K3 with no audio distortion and no
off-frequency artifacts at all. I use the least amount of AGC possible
... AGC THR = 008 and AGC SLP = 000. The only way I've ever experienced
audio
- Original Message -
From: Steve Ellington n...@carolina.rr.com
Geoff
Try putting a 50 ohm dummy load in line and see if the K3 and your ext.
meters read the same swr. This will take reactance and inbalance out of
the picture.
Thanks Steve. I did try that and with a 50 ohm dummy
On Sun, 3 May 2009 21:39:55 -0700 (PDT), orbarrett wrote:
I was joined while ragchewing with some friends on 5371.5
by two other friends locally, one operating HF mobile from the same driveway
and another operating from a base rig in the shack (using a backyard dipole
antenna). When either of
I have never noticed slow variations in output during normal operations on
my K3. However, the other day I installed the external ALC mod. During the
testing step I connected and disconnected a 9 V battery with a series
resistor. It took a couple of seconds for the K3 output to change. Seems
G'day,
I have a neighbour, VP8LP only 300 metres away. If I drop onto his
frequency when he transmits the S-meter doesn't have enough digits to
display. Only when my beam is pointing at him do I notice anything
untoward on the audio. This goes away as soon as I switch on the
attenuator or
This Duhing is entirely unfair. Didn't you read what he said? The author
stated that he had the pre-amp off, RF gain at minimum, NB off, NR off and
ATTN turned on. What more could he do to eliminate the overload? Without
looking, I believe the MDS of the K3 and the FT-817 are probably similar
On Mon, 4 May 2009 13:36:18 -0400, Randy Downs wrote:
I see distortion with a 40 over signal. 35 to 40 over seems to be when
I see it. Preamp on.
So turn the preamp off! Preamps are for weak signals on the higher HF
bands. Preamps should NEVER be used below 20 meters, and rarely on 20M.
Hello Geoff,
Which bands were you making the comparison on?
Bob, N6CM
On Mon, May 4, 2009 at 9:48 AM, Geoffrey Downs
geoff...@downs.globalnet.co.uk wrote:
- Original Message -
From: Steve Ellington n...@carolina.rr.com
Geoff
Try putting a 50 ohm dummy load in line and see if the
Hi,
Just been looking through my archives. I remembered that there was a
simple mod to the K2 to overcome audio distortion in an extreme overload
environment, I installed it on my K2 and it was totally immune to
co-channel audio distortion when my very near neighbour VP8LP transmitted:
K2 -
On Mon, 4 May 2009 14:12:09 -0400, Randy Downs wrote:
It's on 10 meters. Should I not run 10 meters?
Of course not. Just don't be surprised when several volts of on-
frequency RF causes overload.
73,
Jim K9YC
__
Elecraft mailing
Mike,
That mod to the K2 (which has been incorporated into the new K2s) is
simply a limiter.
If the signal level at the input to the IF amplifier ever increases to
the point where the diodes clip the signal, then distortion will occur.
The clippping distortion may not be noticed on CW, but it
Why are we throwing stones? The K-3 is different than other transceivers that
we have used. In the heat of a contest or chasing DX one does not always
immediately make sense of what is happening. Sharing some observations about
characteristics of Elecraft products along with ways of dealing
I haven't ever experienced a problem with strong on-channel overload
with the K3. But it's possible that you're hitting it with so much
power that you're putting one or more RX stages into saturation,
possibly including the I.F. amp. (In an extreme case, you could even be
exceeding the useful
Is there a way to vary the rate of change which seems to be set at 10Hz?
I'd like it to be 5Hz for PSK. Some of the stations are too close
together to sort them out.
Having said that - I'm by no means an expert at PSK
Tom
GM4FDM
__
(In an extreme case, you could even be
exceeding the useful range of the TR switch PIN diodes. The FT817, if
I'm not mistaken, uses a TR relay.)
Some scratch-paper calculations in a 50-ohm system:
Assuming it really is the T/R PIN diodes, they would conduct at just under
one volt. In a
Crew,
Some feel that my posts are sometimes harshly worded. Perhaps they
are. But it seems to me that someone with a General Class ham
license, and especilly someone with an Extra Class ticket, ought to
have spent some time studying something more than the Study Guide to
pass the exam. This
Hi Don,
Quote
The two diodes limit the signal to 1.4 V peak-to-peak. Even when the
diodes are conducting, i.e. when the signal
is so strong that it looks like a square wave at pin 4, there is no
audible signal distortion. This is because the
MC1350 is followed by a second crystal filter which
40 over is several volts? I thought it was around 5 mili volts. That's what
I am talking about. I've seen this distortion in signals since several fw
revisions ago. If I get time tonight I'll reload some earlier rev's.
Randy
K8RDD
- Original Message -
From: Jim Brown
Or maybe you don't listen very well. I said nothing about a several volt
signal. I'm talking about 40 over s9. Maybe I should have explained it
better to the group. No the nb is not on as this will cause distortion
depending upon the blanking level. (IF) blanking. I expected that some would
On the 40M band only I'm getting an S7 pulse noise during much of the
day making 40M nearly unusable. Most nights I don't hear it but last
night it was just as bad as during the day. The pulse's are approx.
30hz and short in duration. My antenna is a vertical (my only option
here). I would
Ron
It's a very inexpensive option. I'd try it.
I have it in both my K2s and it works just fine
on some noises and not on others. Even the K3
has this problem though.
Good luck and 73
Bob N6WG
- Original Message -
From: Ron Greene rgte...@roadrunner.com
To: elecraft@mailman.qth.net
Good day:
I can't help myself. :-)
The usual definition of an S9 signal is 50 uVolts, or -73 dBm (assuming a
50 Ohm load).
The S-Meter unit is a 6 dB change in VOLTAGE, not power. To get one VOLT,
we need 2000 times 50 uVolts, or S9 + about 86dB (86 dB over S9).
40 over is about 5 mVolts...
On Mon, 4 May 2009 16:55:02 -0400, Randy Downs wrote:
Or maybe you don't listen very well.
Possible. But I sure thought I read that the overload was occuring
on another mobile parked in the same driveway and the signal from
a dipole used by another station in whose driveway they were parked.
Good Afternoon,
I now have the previously unlisted QNIs. I will fill in the slots as I go.
Added entries have been indented for your convenience.
On to the list =
On 14050 kHz at 2300z:
NO8V - John - MI - K3 - 820QNI #65!!!
K4JPN - Steve - GA - K2 - 1422
AB9V - Mike - IN - K3 -
On Mon, 4 May 2009 21:10:46 + (UTC), k...@comcast.net wrote:
Now, let's hope I managed to get this right. :-)
Nothing wrong with your math. The likely error is in assuming that
ANY S-meter is accurate at the extremes of its range. All the S-
meters I've seen compress both at the top and
--- On Mon, 5/4/09, k...@comcast.net k...@comcast.net wrote:
From: k...@comcast.net k...@comcast.net
Subject: Re: [Elecraft] K3 on-channel strong signal overload?
To: elecraft@mailman.qth.net
Date: Monday, May 4, 2009, 3:10 PM
Good day:
I can't help myself. :-)
The usual
I also have found that the K3 ALC response
time appears too slow to be useful.
Maybe it can be fixed in Firmware.
I going to disable it until it is fixed.
73 Ken K5DNL
--- On Mon, 5/4/09, Erik N Basilier ebasil...@cox.net wrote:
From: Erik N
I hope this will be the last test of my e-mail problem. Thanks for bearing
with me on this.
73
Dan
af4lb
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post:
Jim,
I have some questions.
DUH! Why are you surprised by this? You had the K3 set for maximum
sensitivity and then hit it with a 100 watt transmitter. OF COURSE
it's going to overload!
I don't think this is follows naturally. Doesn't the automatic gain
control (AGC) do the same thing as
Geoff,
That test at 50 ohms substantiates that the wattmeters are properly
balanced for a 50 ohm system, and nothing more - read on if you are
interested in more skepticism.
Contrary to several statements made, it is quite possible that *all*
those wattmeters can be wrong when reporting SWR
46 matches
Mail list logo
