Larry N8LP wrote on 24 Februay 2009, at 02:40.
I think the days of receivers with xtal filters are numbered. High speed
ADCs capable of 140dB dynamic range without xtal filtering are on the
horizon. A 20-bit ADC with enough processing gain would do it.
--
Let's see: 122 to 140dB: only 15% increase! a walk in the park...
; - )
David
G3UNA
Geoffrey Mackenzie-Kennedy gm4...@btinternet.com wrote:
Larry N8LP wrote on 24 Februay 2009, at 02:40.
I think the days of receivers with xtal filters are numbered. High speed
ADCs capable of
Have two K3's, selling one.
Have REDUCED price.
Anyone interested Please reply off the list will give more details.
73 de KE4WY Jim
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Help:
I have a K2 for sale with the following modules fitted, KSB2 SSB adaptor
kit, KNB1 noise blanker kit and K160 top band kit. The serial number is
04458 and it works well is in very good condition and has the latest
firmware installed, complete with all documents and power lead. Please
contact
Geoffrey Mackenzie-Kennedy wrote:
Larry N8LP wrote on 24 Februay 2009, at 02:40.
I think the days of receivers with xtal filters are numbered.
So don't put the old horse out to pasture just yet :-)
I recall Icom's President Mr. Inouye saying something similar to Larry's
comment
It's interesting to see how many K2s and K3s are mentioned along with how well
they did. Other comments make for fun and educational reading.
For the 2009 ARRL DX CW:
http://www.eskimo.com/~mwdink/3830/ARRL%20DX%20CW%20Soapbox%20Feb%2023%202009.txt
For comments from all the major contests:
wayne burdick wrote:
BTW, I see QRP as fun activity, not as a lifestyle. I run 20-100 watts
about half the time, and 5-10 watts the other.
Same here. I appreciate having the 100W PA I got for my K3, but I still get
the most pleasure from the contacts I make using 5W or less.
For me,
Question: What's a fair price for a K2-100 which is loaded?
Thanks in advance.
Dave, W6AQ
**A Good Credit Score is 700 or Above. See yours in just 2 easy
steps!
On Mon, 23 Feb 2009 13:57:32 -0500, Steve Ellington wrote:
Is this correct?
If a cw signal falls within the DSP passband it should and will pump the
AGC. If a CW signal falls outside the DSP passband it should not pump the
DSP's AGC. The problem here is defining what the DSP's passband it. If a
Selling brand new K2 Ser# 6671, with SSB ATU, Hand mic Gamma Power Supply.
Professionally scoped aligned after construction, over $1400 invested, asking
$1200.
H. Michael Pierce
KD8DVV
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Not today... but give it a couple years. There is a lot of RD being
poured into this by a number of competing chip manufacturers. Even if
the next batch of designs falls a little short, an all digital design
with BDR close to the best conventional designs would probably enjoy a
very
Now, let's look at the AGC. I haven't taken the time to study design
details
of the K3's AGC, but from what Wayne and Lyle have posted here, I think I
understand that there are two AGC functions,...
And that, I believe is the root issue on the matter.
(1) What is the passband of the
K3 has sold.
Thanks to all who replied.
73 de KE4WY Jim
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Jim
Sent: Tuesday, February 24, 2009 6:05 AM
To: elecraft@mailman.qth.net
Subject: [Elecraft] K3 F/S
Have two K3's,
Planning on hooking up an old 811 to my new k3 100. Appreciate any
tuning tips.
Bill Wade Ai4PF
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Post:
To the Elecraft Crew,
Many thanks for building into the K3 to sense when the AC power is not there
and shut-off
completely!
I say this because earlier this morning here locally there was a PGE power
outage. Initially the
juice went off and then just a few mil-secs the power tried to come
On Tue, 24 Feb 2009 13:02:58 -0800, JIM DAVIS wrote:
Many thanks for saving our BABY!
Several thoughts. First, the K3 is isolated from the AC line by
whatever DC supply you are using with it. For many years, I've run
the 12VDC powered equipment in my hamshack from a big battery that
is
I agree this is something amateur equipment manufacturers like Elecraft
should be keeping their eye on. If Analog Devices or someone came out
with an under-$100 ADC with performance close to the K3, then you could
save a lot of money and complexity by going to a directly-sampled RF
front end
The Elecraft K3 Utility program, is a great thing to have and is
handy as an extra pair of hands. It provides, not only the conduit
to upload firmware and make changes in the K3 but it also has a
really nice terminal program to display what the K3 has decoded.
My request is for an addition
At least one manufacturer (Tripp-Lite / Isobar) advertises that if your
equipment is damaged from a power surge when powered thru their device
they will repair or replace it for free. I use their surge suppressors
for my computers, and have never had a problem, although they tend to
make a
You may be right, Al. I think the improvements may be incremental, and
distributed among various aspects of the design, not just the ADC. For
instance, ultra-low jitter clock sources, faster FPGAs with improved IP
cores, etc. I think most hams would be thrilled with an improvement to 130dB
BDR,
I use my K3 with an Al-811 and it works just fine. I had the amp before the
K3 so I already had my settings for load and plate recorded. Just use the
settings in the 811 manual as a starting point and tune to what works best
for you then record those settings. I have replaced the original
At the W1KM contesting site, we routinely see signals of +5 dBm or
louder on/near 40m from SWBC stations (using a single Yagi). We also
have two modest-power local AM stations (1 to 5 kW, a few miles away)
just below 1500 kHz that show up even a bit stronger than that on our
160m antennas.
It appears that all the mods should be included in this kit. I ordered it
last week. The KIO board does not have any jumpers across the chokes. Has
this board been reworked so there would be no jumpers and would this hold
true for the mod kit KIO Digital board that I just got in for my other
Have noticed this on other bands but paid no particular attention,
but today was tuning 160 meters and every 5 khz there is a pop
or change in background receiver noise when tuning.
I listened carefully and it is there tuning up freq or down. It is
at every 5 khz.
I can hear it at 1809.1,
It is a K3.
I am not seeing this on my unit. I even tried it with the ATU.
A slip of the foot you may soon recover, but a slip of the tongue you may
never get over. Ben Franklin
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On
Merv Schweigert wrote:
Have noticed this on other bands but paid no particular attention,
but today was tuning 160 meters and every 5 khz there is a pop
or change in background receiver noise when tuning.
Hi Merv,
This is normal. The K3 has an incredibly low-noise analog/digital
Working AM on VFO A and setting up VFO B to receive SSB then operating the
split it tells me SPT N/A.
It used to work before installing v2.82, but it doesn't now which is a real
nuisance as I have to manually switch between the VFO's if I want to
transmit on AM and listen SSB. Is anyone else
G4LNA wrote:
Working AM on VFO A and setting up VFO B to receive SSB then operating
the
split it tells me SPT N/A.
Hi Paul,
I'm sorry to report that only a few modes are presently allowed for
cross-mode split (CW/SSB, LSB/USB, CW/CW REV). Our goal is to add other
modes back in if there's
On Feb 24, 2009, at 7:53 PM, W0MU Mike Fatchett wrote:
It appears that all the mods should be included in this kit. I
ordered it
last week. The KIO board does not have any jumpers across the chokes.
Has
this board been reworked so there would be no jumpers
I'm pretty sure this is the
Yet it makes so much sense with the UI. DATA MD has no functionality
when in CW and when holding NB or NR or the Notch filter or the like it
allows you to configure the settable features of that feature. Granted
its a slight UI breach but the product is still labeled as such on the
button. I
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