On Mon,7/27/2015 10:28 PM, Phil Wheeler wrote:
Oh oh, Jim: We need a P3A :-) Good you took this on.
Perhaps P3 firmware can be re-written to allow display of greater
dynamic range to the extent that electronics headroom supports it?
73, Jim K9YC
I wonder how you guys with 100 programmed memories manage to remember
what is in what memory?
Personally if the number gets to be greater than 5, I have no clue. It
becomes trial and error.
73 de Brian/K3KO
On 7/26/2015 23:47 PM, Nr4c wrote:
I'd like to see a feature to save User settings to
Just wondering if anyone received their P3TXMON as yet.Bill-W0BBI
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Would it be possible for Elecraft to document what commands were used to
extract and rewrite the memory items? Given that, it would be too
difficult to write (portable) python code to do the memory extraction.
Then we'd all have a linux client.
On Sun, Jul 26, 2015 at 6:58 PM, Phil Hystad
I manage memories for all my radios including an Icom R8500 that has 1000
memories. There are programs that can save and edit the memories to a PC
file but I keep a frequency list in an Excel spread sheet.
-
Jack WA9FVP
Sent from my TRS-80 :-)
--
View this message in context:
Can't speak for everyone else, but I have all 100 memories programmed.
I just have them programmed in 160 - 6m order, 4 per band. Each of
the 4 has one each CW A/B, Data, SSB1, and SSB2 (tailored to the band,
of course). It's easy enough to spin VFO A to get to the right band
and mode, then tune
K3/100 factory assembled
KAT3 ATU
KXF3A Ver. B
KTCS03-1 High stability Ref. Osc.
KF3A 2.8HZ 8 pole filter
KFL3A 250HZ 8 pole filter
KFL3A 6KHZ 8 pole filter (general coverage)
This radio has just been returned from the factory, sent in with instructions
to “make it like new.” Factory
Not yet. Hopefully, they will start shipping this week.
73,
Bob Nobis - N7RJN
n7...@nobis.net
On Jul 27, 2015, at 05:43, Bill Wiehe via Elecraft elecraft@mailman.qth.net
wrote:
Just wondering if anyone received their P3TXMON as yet.Bill-W0BBI
Hi Alan,
In fact, the spectrogram that I posted shows strong key clicks of Class D
amplifier on the signal to 472.1 kHz.
Also the linear amplifier at 472.5 KHz in the spectrogram shows key clicks
but lower.
On the other hand you can see that my signal at 473.3 is very clean without
key
To catch up on the comments I address all that I have so far:
Re: linear vs class-C is really a moot point as its easy enough to
build a linear at 500-KHz. CW, JT65, FSK all do fine with class-C,
of course. And its true that any modulation of a continuous carrier
will impart some bandwidth.
On Mon,7/27/2015 10:43 AM, Edward R Cole wrote:
CW, JT65, FSK all do fine with class-C, of course.
Ed,
I suggest that you drive a Class C amp with a K3 transmitting CW and
look at the spectra with a P3 both at the output of the rig and at the
output of the amp. Set the P3 display for 5 kHz.
Phil,
That is correct, and the keying of that output stage was shaped in many
cases.
Grid-block keying was all the rage for help in shaping the keying envelope.
Cathode keying was used too, but usually not with keying. You had to be
careful the key did not bite from the voltage on it.
73,
The need for linear amplifiers with CW has been known for many years.
Quoting from the 1964 ARRL Handbook:
When key clicks introduced by the addition of an amplifier stage
are found only near the transmitter frequency, amplifier clipping
is indicated. It is quite common when fixed
Hi Joe,
I received my K3S last week SN 10057. I cannot give you an A-B comparison
against the original K3 as I never had one. One thing I can comment on though A
to B, is about the speaker audio between the K3 and K3S as I was exposed to
several K3's at field day. The speaker audio is MUCH
Howdy Gang:
I wonder if anyone has received a new K3S yet??
Would certainly appreciate any comments as to performance, receive audio
quality, new preamps, etc, etc.
Many thanks for any info.
73, Joe W2KJ
I QRP, therefore I am
I'd have to dig out my old circuit diagrams, but
it seems like when we used Class C amps back in
the day (1950's and 60s) we keyed the output
stage, not only the driver as with linear amps --
and we modulated the output stage in the AM days, too.
73, Phil W7OX
On 7/27/15 11:42 AM, Jim Brown
Just finished assembling 10122. Kit, loaded.
Integration into shack starting this evening. Nothing to report.
Jim ab3cv
On Mon, Jul 27, 2015 at 5:02 PM, Joe W2KJ w...@bellsouth.net wrote:
Howdy Gang:
I wonder if anyone has received a new K3S yet??
Would certainly appreciate any comments
Joe W2KJ w...@bellsouth.net wrote:
Howdy Gang:
I wonder if anyone has received a new K3S yet??
Hi Joe,
We have shipped a few dozen, but some have not been received yet, and probably
half were kits, which take longer to come on-line. Some of those received have
already been mentioned on
Yesterday we had the first K3S check in for the Elecraft CW Net.
Comparing K2s, K1s, KX1s, K3s, KX3s, and the new K3Ss is fun :) It is
hard to tell them apart unless the owner tells you which they are running.
73,
Kevin. KD5ONS
On 7/27/2015 2:48 PM, Wayne Burdick wrote:
Joe
K3S #10125 was born Saturday, July 25th, 3pm. It’s companion PX3, yesterday.
Still calibrating, but I just wanted to send five stars to everyone at Elecraft
on yet again another wonderful experience in kit building. So much detailed
thought goes into packaging, the assembly manual, and of
Finishing up s/n 10111. Starting on the sub receiver tonight. A few typos
in the assembly manual - expected as they make the transition from the K3 -
but no show-stoppers. I'll post some suggested edits soon.
73, Ian N8IK
-Original Message-
From: Elecraft
Hello All,
I have K3S s/n 10027. I have had it since July 6th and I am VERY happy with
the K3S.
It out performs any other radio I have ever used. I can't wait to get home
from work every day so I can
use the radio. The best Ham Radio purchase I've ever made!
Keith Robinson
W4KTR
Interesting discussion, but I'm now confused.
In all the old handbooks the discussion of amplifier design says ( page
76, 1941) In amateur transmitters, and r.f. amplifier is invariably
operated Class C ( see Chaptr 3). I though the final tuned circuit was
simply pulsed at the RF freq and
In the good old tube days, typically the transmitter's final amplifier
was the keyed stage, or at least one of them. So the key shaping was
not degraded by a subsequent amplifier. It's OK if the PA is a class C
amplifier as long as the key shaping circuit takes that into account.
One way to
Wayne is off in one minor respect - we've shipped well more than a few dozen K3S
radios and are well into the hundreds now. :-)
73,
Eric
/elecraft.com/
On 7/27/2015 2:48 PM, Wayne Burdick wrote:
Joe W2KJ w...@bellsouth.net wrote:
Howdy Gang:
I wonder if anyone has received a new K3S yet??
Those first point contact transistors such as the CK722 were rather
'finicky'. Not much margin for error, and they were expensive.
Now we can buy 2NAs for pennies.
73,
Don W3FPR
On 7/27/2015 8:49 PM, Alan wrote:
You could abuse a spark transmitter, but the tubes would die if you
K3S 10081 is on the air.
Still integrating it into the shack. First contact was on 80 meters with the
local HF net. Second was a ZL1 on the North Island on 40.
Hard to compare it with other radios -- this replaces an Icom IC-7000, which
isn't at all in the same league.
Still learning how to
Hi Jim,
I do have much more modern handbooks. Current in fact. :) Just
remembered more Class C referenced in the older ones.
Will have to go read articles back then on key clicks and distortion.
And continue to look at what amplifiers I could use on the two soon to
be lowest bands.
73,
On Mon,7/27/2015 4:57 PM, Tom Azlin W7SUA wrote:
In all the old handbooks the discussion of amplifier design says (
page 76, 1941) In amateur transmitters, and r.f. amplifier is
invariably operated Class C ( see Chaptr 3). I though the final tuned
circuit was simply pulsed at the RF freq and
Frank,
The KPA100 is dedicated to the K2.
To operate the KPA100, it needs the base K2 MCU to change bands, do T/R
switching, and monitor the power output (among other things).
Those functions depend on the signals to and from the base K2 MCU. The
same is true of the KAT100 mounted in your EC2
Don,
You are making feel old. I remember the CK722. I had one as an
audio amp behind a crystal set I built using a 1N34, not sure it was
even an A version. I had a 210 foot piece of wire strung from the radio,
through my bedroom window to a post in the back of our yard. I could
hear,
My K3S, S/N 10023, arrived a few weeks ago and I couldn't be happier with
it. Never had an original K3, but the receive audio is good and filtering
with the matched pair of 400s and the 250 in the main VFO was stunning
during the IARU contest. I've only played a little bit on 6m and the preamp
OK on all the thread.
Ed, Yes, I am interested in following your linear amplifier project.
73, tom w7sua
On 7/27/2015 10:43 AM, Edward R Cole wrote:
To catch up on the comments I address all that I have so far:
Re: linear vs class-C is really a moot point as its easy enough to build
a linear
Squinting at my KX3 and my K2 / external KPA100/EC2…
Anyone try it?
Frank KG9H
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Clearly you are not among those who reminisce
about the rotary spark gap, Alan :-)
73, Phil W7OX
On 7/27/15 1:53 PM, Alan wrote:
The need for linear amplifiers with CW has been
known for many years. Quoting from the 1964 ARRL
Handbook:
When key clicks introduced by the addition of
an
On 07/27/2015 05:32 PM, Phil Wheeler wrote:
Clearly you are not among those who reminisce about the rotary spark
gap, Alan :-)
By crackey them vacuum tubes are just too durn delicate for serious ham
radio work. Old reliable spark is much more rugged.
Quoting from The World of Ham Radio,
I finally got around to repeating a few measurements using with the new
K3SYNA boards. I've added the results near the beginning of
P3_Spectrum_Measurements.pdf
There's also a measurement of an un-keyed, unmodulated carrier.
Executive summary -- the screen of the P3 can display only 80 dB of
Oh oh, Jim: We need a P3A :-) Good you took this on.
73, Phil W7OX
On 7/27/15 10:05 PM, Jim Brown wrote:
I finally got around to repeating a few
measurements using with the new K3SYNA boards.
I've added the results near the beginning of
P3_Spectrum_Measurements.pdf
There's also a
Don wrote:
Those first point contact transistors such as the CK722 were rather
'finicky'.
Point-contact transistors could be variable in terms of electrical
characteristics, but mechanically they were a lot better than mythology
presents. Regardless, the famous 1953 Raytheon CK722 was *not*
Bob Martin k6...@comcast.net wrote:
Enabling options can be a challenge -- that could use a dedicated section
with things gathered together in one place. As an example, I just figured out
how to get the KXV3's second preamp for 10 and 6 working -- it's in the
manual, scattered about a bit,
CW also requires a highly stable ALC system, without unwanted dynamics, to
preserve ideal envelope shaping. This is lacking on some all-mode rigs that pay
little attention to CW.
Wayne
N6KR
On Jul 26, 2015, at 9:32 PM, Alan n...@sonic.net wrote:
CW would be another mode that would not
On Sun 26 Jul Matt Zilmer wrote:
Since both functions are already available,
That availability is limited. Windows is covered, and there's a beta
version on Mac (which seem to work OK) but nothing yet for linux.
It's a pity the function isn't included in the relevant Utility
programs.
--
It depends on how you made the amplifier.
I produce some models of amplifiers, of different powers, all in switching
operation.
Here an image of the DK7FC grabber, you can see at 472.1 KHz the
spectrogram of
a German station that use a class D amplifier, at 472.5 an Italian station
that use a
A CW amplifier can be designed to run class-C but to be keyed in such a
way as to pass through the linear portion of the amplifying device's
curve when a CW element is starting or ending, in order to preserve the
shaping.
A simple example is the tube-type amplifier that has just enough fixed
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