Almost all of the operators ran the K3 with AGC off (all modes).
-- Eric
Eric, can you explain what did you not like about AGC in K3?
Did you notice any problems with DSP being permanently on in K3 when
listening to heavy pile ups?
73, Igor UA9CDC
In a recent message, M0RLM [EMAIL PROTECTED] wrote ...
I am finding a problem with the keyer on my K1 that I just finished
building.
Sometimes when I press dot I get dash-dot (-.) instead (even if I never
pressed dash before at all).
Rui -
That sounds as though it could be RF getting into the
Almost all of the operators ran the K3 with AGC off (all modes).
Eric, can you explain what did you not like about AGC in K3?
Also which version of the firmware was installed while on VP6D would
be interesting.
I believe than Wayne and Lyle have been making changes, but personally
Hello list,
as I am waiting for my K3/10 I am thinking about some personal
modifications.
Maybe somebody else has some more detailed ideas and can add some
comments.
What I am thinking about:
as there will be a space inside K3 (not having 100W and ATU unit),
what about to
- putting small
I posted this question a week ago or so and did not hear a peep about it. Two
fellow list serve participants emailed me asking if I had gotten a response.
So, there is a small amount of interest. Here is what I asked
In an attempt to learn more about the K3 and understand AGC
Alexandr
One of the things that surprised me when I built my K3 is how small it really
is. I would think you could do some of the modifications with the 10 watt
version if you had the power amp shield installed. The physical room is rather
small in the radio once you have it built. So,
You can tap DISP when any of these are displayed and a short help
message will scroll across the VFO B display.
AGC HLD (Hold?)
In slow AGC, this is the time that the AGC will hold its most recent
peak value before starting to decay.
AGC PLS (Pulse?)
This defines the width of a signal
as I am waiting for my K3/10 I am thinking about some personal
modifications.
Last night, I completed 80% of the K3 assembly in about 3-1/2 hours.
Although this is not really a mod, I did replace the two SO-239 coaxial
panel receptacles with Amphenol Teflon types. I am a big proponent of
Building K2 S/N 6430 and at page 48, AGC and S meter alignment. I can only
get a maximum of 3.60V from the pin 5 of U2 with R1 set at its ccw limit.
Additionally, for S meter alignment, both CAL S LO and S HI I am not seeing
the LEDs illuminate at all with either dot or bar settings. All other
I'm not in favour of bringing the mains supply into the box. My dc power
supplies all have isolated outputs, ie neither go to the psu frame/ground, so
mains earth is separate from rf earth. I know it's done on some big t/rx, but
I'm not in favour.
Even with a small mains psu, you might have
Hi Lyle !
i obseved, that the combination HLD (30ms) and PLS (on) not working well
I have dedected pulses every second at my qth - so hold let the agc hold
for 30ms and agc goes down... downsizing HLD to zero it works well,
so maybe you can also include that any hold will be disabled when PLS is
Thanks for comments!
I was afraid main will be loosing of any warranty but all comments
are touching real possible problems.
I hope to see how much place is inside soon - from manuals and videos
it is only frustrating informations :-)
73!
L. -dst-
[EMAIL PROTECTED] napsal(a):
I'm not in
Hi
This is usually caused by the 8 volt regulator output on the low side of its
tolerance. Check the 8 volt supply if it is low say around 7.5 volts ask
support to send you a replacement. In the mean time just go ahead with the
build the agc and S meter are finalized later in the alignment.
For more than twice the price, the Pro III should be a little better than a
K2. But which K2; every K2 is a little different depending on the skills of
the builder. I'll take my K2 over a PRO III, maybe even a 7800. The K3 is
still less expansive than the PRO III, too.
73, Jim K4ZMV, K2
Hello
I am looking at building a K3 to use as the IF for my 2m system. At
present I have a modified FT1000MP with the sub rx brought out to a
separate connector. This allows me to listen to the main antenna in one
ear and a second antenna (usually mounted at 90 degrees to the main
antenna) in
When the sub-rx is installed, it will be controlled by VFO B. The
latest firmware release notes state that VFO A B can be locked together.
73,
Ken K3IU
g0afh wrote:
Hello
I am looking at building a K3 to use as the IF for my 2m system. At
present I have a modified FT1000MP with the sub rx
Lee,
Do you mean more than what is in the manual?
AGC HLD [T] 000 (Advanced.) AGC âholdâ time for voice modes. Specifies the
number of
milliseconds that the SLOW AGC value is held after the signal drops below the
level that set the AGC. This is often helpful for SSB voice operation.
AGC
And I think if the boys at VP6DX had understood this, they
wouldn't have had any complaint about the AGC on the K3.
Dave W7AQK
- Original Message -
From: Lyle Johnson [EMAIL PROTECTED]
To: Elecraft Reflector elecraft@mailman.qth.net
Sent: Thursday, March 13, 2008 5:25 AM
Subject:
Another thing that should be mentioned is that the Pro 3 is four times the
cost of a K2. So, it stands to reason that it should do something a little
better than the K2, at least four times better. Does it?
If I were an owner of a high end transciever costing thousands of dollars, I
would
~
N2CQ QRP CONTEST CALENDAR
March 13 - Apr 13, 2008
~
80 METER FOXHUNT (CW) *** QRP Contest ***
Each Tuesday to Mar 25
9 PM to 10:29 PM Eastern Time USA
Info:
A HOLD of the SUB button LINKS the two VFOs. Another HOLD unlinks them.
-
73,
Greg - AB7R
Whidbey Island WA
NA-065
K3#0009 and 0319
On Thu Mar 13 7:26 , Ken Wagner sent:
When the sub-rx is installed, it will be controlled by VFO B. The
latest firmware release notes
Four times?? A K2 with enough options to make it comparable to an
IC-756ProIII is $1861.00. The current best price on the IC-756ProIII is
2695.00 - that's not even twice, its only 30% more. Considering the the
time invested in building one - the K2 is not even close to an
economical radio.
The reality of this topic is that when you compare a K2 with an ICOM ProII, you
have to add up the cost of a comparably equipped K2DSP module, 160M,
module, 60M module, external antenna tuner, 100W amplifier, Noise Blanker
module, and SSB module. The total rapidly approaches $2000! If you
Well, the manual is good, but it does not really define what the parameters are
doing very well. I think the Lyle did a good job of defining the parameters
and letting people in on what the engineer was doing, thinking, and planning.
I thought a broader and more detailed explanation would
Lyle Johnson wrote:
AGC SLP (Slope?)
This allows you to change the flatness of the AGC. Some people like
ift flat (very strong signals and moderately weak signals all have the
same loudness). Others prefer that stronger signals drive the audio
level alittle harder than weaker signals.
What makes you think I did not try to educate myself using Google?
Just because I am not an engineering type steeped in mathematics, I still want
to understand the function of the parameter. Yes, I understand the function of
AGC and what it is intended to do...and in fact...I did search
Dear Igor Others,
May I speculate?
Any AGC compresses the dynamic range of incoming signals. AGC means
Automatic Gain Control. If you had an invisible hand that would
adjust the RF gain control for you, that is what AGC does.
When you are working many stations on the same frequency and
Vic K2VCO wrote:
I reduced THR because I do not want *any* AGC action on the weakest
signals.
Shouldn't you be increasing THR if you don't want AGC action on weakest
signals, i.e. raising the threshold for the onset of AGC action and not
amplifying the weakest signals through AGC action?
Privet Igor --
As best I can remember, we used MCU v1.66 and DSP 1.52.
I didn't use the AGC because I did not need it. The point of
automatic gain control is to adjust the gain of the various stages of
the receiver in order to
a) avoid distortion/overdriving a stage, and
b) bring
That's true but, I wasn't considering a fully loaded K2, just the base model
which is the one that I have. I don't think any of the rigs on the market
right now are bad rigs, it just depends on what you are going to do with them.
For me, just about anything would do for the kind of operating I
TR, WB6TMY, K2 S/N 838 wrote:
When I was a commercial operator at KPH, nearly all the operators ran
AGC off all the time. It makes the QRM/QRN fade away.
TR, WB6TMY
Another one that Fred K3ZO (many time winner of Dayton CW pileup contests)
recently mentioned is using extremely low
Bill W4ZV wrote:
Another one that Fred K3ZO (many time winner of Dayton CW pileup contests)
recently mentioned is using extremely low pitch for weak signals. Fred
said many commercial ops he knew used somewhere in the 2-300 Hz range so
he thought his favored 400 Hz was rather high!
This makes perfect sense. The ears have a logarithmic response to sound
pressure and to frequency.
David
G3UNA
Another one that Fred K3ZO (many time winner of Dayton CW pileup
contests)
recently mentioned is using extremely low pitch for weak signals. Fred
said many commercial ops he
400 Hz is my upper limit as well.
Lower than 300 Hz is certainly desirable to me.
I have forty plus years on CW, and no significant
hearing loss. I do the between-the-headphones DSP
far more effectively at 400 Hz and below.
73,
john WA1ABI
-Original Message-
From: [EMAIL
Thanks Eric,
I understand you think AGC in high dynamic range radio like K3 is not a
necessity for the op with high dynamic range ears.
Actually the range should be close to 90-95 db on nowadays bands where 59+40
signals co-exist with 1S unit signals very often. I also figured from your
post
The other day I tried to post a link to a picture I had taken of a
problem in my K3. I tried several times to post the link in a mail,
and each time it bounced. I found that if I left the http:/ off the
front of the link, it wouldn't bounce. So, I posted the link without
a http, and asked
I must be doing something wrong because I see other complete links
posted to the list. I ask for your help if anyone has any idea of what I
may be doing wrong.
Enclose it in angle brackets with a prefix URL: and a space separating
the brackets from the URL, like this:
Igor Sokolov wrote:
What about the DSP then. I experienced that myself operating from 8Q7 in
the past and many others confirmed my impressions that modern DSP based
radios are no good when pulling call signs from the pile up of many
stations when the average level of that pileup is close to
Barry N1EU wrote:
Shouldn't you be increasing THR if you don't want AGC action on weakest
signals, i.e. raising the threshold for the onset of AGC action and not
amplifying the weakest signals through AGC action?
I did whatever was necessary to raise the threshold...I vaguely
remembered
Disclamer: I am a very bad CW operator :-(
But I discovered that my K2, had a rather limited low freq audio
response. So I took a look at the schematic for the audio circuit in the
K2...
The original low freq. cutoff (-3db) freq. is approx. 640Hz (with KAF or
DSP moduls installed) or 400Hz
Igor --
Your question about DSP is an interesting one.
In my limited understanding of the K3 signal path, there is always a
DSP operation on the signal for filtering. While noise blanking, noise
reduction, and audio effects can all be switched off, I don't know if it
is possible to
Greetings everyone,
Like many others here on the forum, I've been patiently waiting for my
new K3. My order was placed on 2/18 and at the time, I was told there
would be a 4-month turnaround time. In fact, the Elecraft website is
still indicating a 4-month turnaround time. Being that this will
Hi Lyle Co.
Enclose it in angle brackets with a prefix URL: and a space separating
the brackets from the URL, like this:
URL:http://www.elecraft.com
This also prevents most email clients from breaking up the line as if it
were text for long URLs.
Almost.
No spaces, imho!
Eric, thanks for your posting. The description of human hearing mechanics is
very educational.
OK on DSP issue. Actually one other member of the dxpedition mentioned that
the effect of DSP that I have described is well known to him and was present
in K3 as well. He also mentioned that switching
Bill,
I've been following the trends on the wiki from the
beginning, the prospects for you are... very good!
http://www.zerobeat.net/mediawiki/index.php/K3_Serial_Numbers
[Elecraft] Is the K3 shipping estimate really
accurate?
KB1PXD bill.kimura at gmail.com
Thu Mar 13 15:23:41 EST 2008
Does anyone know how Don Wilhem is doing after his surgery? Tnx, Paul NN5G
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Well, Fred may prefer low pitches, but he hears it all. I've sat next
to him at Dayton (KC Suite) to copy code and for me, the super high
notes just leave me cold...almost no copy. Fred just merrily writes
down the callsigns.
Going to Dayton...a couple hundred bucks. Watching Fred copy every
Brett Gazdzinski wrote:
I would say the K2 is better than the pro2, not quite as good as the pro3.
The pro 3 was improved quite a bit, the noise reduction really works well,
as do the filters, its not as bothered by close in signals as the older
units,
and its got less noise, but still
K3 # 567
Ordered August 3
Now for the fun
John, N6AX
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Bill:
Be patient, I ordered mine on October 18, I may get by April 2nd. If
you want a second Rated rig, by all means get the Pro III. You will not
get it any faster by posting to this reflector. Call Elecraft Direct
instead, They will be happy to answer your questions, then if not
I got a new pro 3 at HRO for $2500.00 no tax and no shipping.
The pro2 is going for about $1500.00 or less, the K2 would be
over $1700.00 I think.
Different radios though, the K2 is a field day rig, the Icom
is a boat anchor power hog, with lots of great features.
Brett
N2DTS
Great mod Matti! Always thought the K2's audio sounded a little
tight... tacked a couple of .1 uf caps across the pads per your
instructions and it sounds noticeably better.
It is an easy mod and I heartily encourage others to try it...easy to
do...and remove... if you don't think so...but
Thanks to everyone who responded. Lots of great advice. It's
very encouraging to hear that the K3 is well worth waiting for.
I'm actually considering picking up a lower priced QRP rig such
as the FT-817ND ($600), and using that in the interim. Hopefully
I'll be able to get most of my money
A follow-up on my original posting:
Yesterday I sent an email to madelyn@, she replyed promptly to inform me
that my K2 kit was shipped three days after I placed the order. It's now
collecting dust at the Dutch customs depot.
'73 Leo PA5LS
--
View this message in context:
Also, if anyone is interested in selling their K2, please email me.
It'll probably be 1-2 weeks however until I'm ready to make the
purchase, but I'm definitely interested.
Thanks,
- Bill, KB1PXD
--
View this message in context:
KX1 Package. Everything you need for portable operation.
KX1 with 30 meters and antenna tuner
KXPD1 paddle
N3CW base to use the KXPD1 paddles on the desktop
Carrying case
Approx 2AH gel cell
Small amplified speaker plugs into phones jack. (Brookstone)
Earbuds
BNC-to-binding posts adaptor
42'
Thank you to all who responded
Paul Gates, KD3jF
Retired Pastor
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Got an e-mail from Don's XYL yesterday morning as I was (literally)
walking out the
door for a trip.
Don came thru the surgery well.
Apparently only one 'spot' was found on his liver and he asked that
it be sent off
for pathology.
Nancy said he was joking with the nurses and doing well.
K3 S/N 593 arrived today in Sunnyvale, CA
was ordered on august 28th
doing inventory now.. so far all is there ;-)
de K6TE Wim
Looking for last minute shopping deals?
Find them fast with Yahoo!
Anybody have some good pics of their K3 assembly process? love to see them!
73
Paul
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Bill, consider a KX1. I hadn't built any kits since the 1960's Heathkit
days, and I was pretty rusty. I had become an appliance operator.
I started with an Elecraft dummy load kit, and then a little oscillator, and
then I was ready for the KX1. It's a cool little radio.
Take a look at one of
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