QST Article received this morning.
Thanks to everybody for the great support!
73 es gl,
Heinz HB9BCB
K2/QRP #1350, #5917
K1-4 #0793, #2460
KX-1 #392
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Lennart Michaëlsson wrote:
Actually, changing filters in the second rx is harder. To change the
filter in rx 1, you can just lift rx 2 out of the way. But to change the
filter in rx 2, you must remove it and take the board out of the shield
box to get at the screw that holds the filter!
I'm wanting to spread out my tuning on my K1 enough to get to 7.120. I have
it now only tuning 80. I don't really care to make it 150. The kit came
with two caps, one for 80 and one for 150 tuning. I don't want to make it
two wide and so sensitive. Is there a way anyone has found?
Also
I've just completed part 1 of the 3080 build and re-done the alignment. All
appears well,
40/20 rx working as expected.
However I've noticed that the rf gain control (R1) appears to now have very
limited range
in fact it hardly seems to make any difference at all - is this because the
rest of
Lennart Michaëlsson wrote:
... and what filters do the test pilots recommend?
Presently I have 6, 2.8, 0.4 and 0.25 kHz - all being 8 pole.
One more issue Len. In your example above, you should only use diversity in
the WIDTH range where identical filters will be in use. You would
Vic K2VCO wrote:
It's not in the manual. They are two different types of DSP filters. I
think FIR has slightly less ringing, but IIR has...something else.
Anyway, some people may prefer the sound of one to the other.
FIR means finite impulse response and IIR means infinite impulse
Hello all,
Well I hiked 27-miles in four days and met a bunch of interesting
people. In fact I met a ham at the ATC Headquarters in Boiling Springs
and another ham on the trail. I hiked from Duncannon, PA to Boiling
Springs, PA and had a real blast. I also took my pimped-out KX1 with
me and made
Different band and QRM conditions can require different combinations of AGC
parameters (HLD, SLP, THR, and decay rate). Thanks to Elecraft for allowing
us to access and adjust all of these to our liking.
But wouldn't it be even finer if we were able to program a few different
combinations of
Cory,
Your problem is with the 2 band board only - the K1 works on 80 meters,
so the base K1 is working OK.
Yes, it would seem that you have a problem with the bandpass filter - it
should not attenuate the signal as much as you reported. Check all the
components, and especially check the
I keep seeing talk of the 400(435) or 500 combined with the 250(370). I see
very little talk about the 200. My thought was to use the 400 and the 200.
Maybe the decision should include the 500/200 combination. Is the 200 just
too narrow or why don't I see more apparent use of it? I know, what
WPX contest with K3/Acom 1000 and 3 ele Steppir @ 40ft.a lot of fun
although condx were pretty poor here in the 'southern cone' for a little
pistol station. Mi amigo, CX6VM aka CW5W, did very FB job from his nice
contest station about 400km from here. I listened to his pileup several
times
How about an updated shipping status on the K3s and second receiver?
Jim K4JAF
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Jim Miller-14 wrote:
I keep seeing talk of the 400(435) or 500 combined with the 250(370). I
see
very little talk about the 200. My thought was to use the 400 and the
200.
Maybe the decision should include the 500/200 combination. Is the 200
just
too narrow or why don't I see more
In a recent message, Jim Cox [EMAIL PROTECTED] wrote ...
How about an updated shipping status on the K3s and second receiver?
How about it, Jim? The existing information on the Elecraft web site
looks perfectly clear. By several weeks, I understand to mean about
four.
They are now due to
Lennart Michaëlsson wrote:
... and what filters do the test pilots recommend?
Presently I have 6, 2.8, 0.4 and 0.25 kHz - all being 8 pole.
Would a 2.8 and a 0.4 be enough to keep cost down for a non FM/AM man?
It depends on what you want to use the 2nd receiver for. I am primarily
Tom CX7TT wrote:
My request for firmware change is to have a method to Lock VFO B so I
dont 'bump' the knob and lose my pileup. How about when Split
activated, Lock applies to VFO B?
You can lock VFO B independently from VFO A. Use A/B or use BSET to lock
only VFO B. I operate the
Lennart Michaëlsson wrote:
... and what filters do the test pilots recommend?
Presently I have 6, 2.8, 0.4 and 0.25 kHz - all being 8 pole.
I am getting only the standard 2.7 for my second
receiver. You can use the DSP to narrow the
response to whatever you need even though you
Hi Orin,
Copying this to the list since others may have a similar situation.
On Wed, May 28, 2008 at 9:08 AM, ORIN G. HELVEY,JR. [EMAIL PROTECTED] wrote:
On the filters, I had planned to only install a 0.500 in the second
receiver as I thought I would probably only be using it
Jim
I've been using 2.8 KHz and 400 Hz 8 pole filters for about 6 months and
find they work just fine. I've not found a need for a narrower filter.
The dynamic range of the K3 is good enough to not worry too much about
needing a roofing filter for every occasion. I run CW, SSB and data
modes
I have the 400/200 and have been happy with it for CW and digital modes,
though I added the 1KHz for CW tuning and wide digital modes (not RTTY).
Leigh/WA5ZNU
Jim Miller wrote:
I keep seeing talk of the 400(435) or 500 combined with the 250(370). I see
very little talk about the 200. My
Went to install the HAGCMDKT kit on #311. Interesting but all was already
done except for shorting R33 and R40. Maybe there were interim fixes for
this mod?
By the way, C222 had already been changed to .1 uF for the CW Keying Rise
Time Reduction. I needed to add the RXA board to the KXV3.
Hi Don, thanks for the reply.
check the green winding, it is easy to pull the leads too
much and end up with a badly tinned lead.
Absolutely correct - that was the problem, RF gain now restored.
73
Trevor G0KTN
Original Message
Trevor,
An RF Gain with severely limited
I installed the HW AGC mod yesterday on K3 325, it was not fitted.
I opted for the SMD components, and all went fine but I decided to use the
standard LED as I was unsure of the cathode marking on the supplied SMD LED.
This ought to be indicated on the instruction sheet I think.
Also fitted the
Interesting that the mod levels of the board aren't reflected by the serial
number.
Yes, I am waiting for the second receiver too. Going with the stock 2.7KHZ
filter for the moment as the main use I have for the second receiver is
listening to the split frequency.
73,
N2TK, Tony
-Original
Hi Tony,
Nothing was required on your part. That is the factory version of the
change that already has very low value SMD resistors installed for R33
and R40.
73, Eric WA6HHQ
N2TK wrote:
Went to install the HAGCMDKT kit on #311. Interesting but all was already
done except for shorting
I have a cable for sale to connect your K3 to a microHAM microKeyer or
microKeyer 2. The part number is DB37-EL-K3.
$50 shipped to any USA location. Paypal or check/money order. Contact me
off-list for additional details.
I will also be selling the microKeyer either separately or as part of
Keep in mind that the working selectivity for shaving off QRM is provided
by the adjustable DSP filter in the 2nd I.F.
The crystal filters in the K3 are actually pre-filters whose primary
function is to avoid overload from extremely strong signals.
Ron AC7AC
Robert,
Tom Hammond has scans of most of the K1 and K2 boards on his website.
Go to http://n0ss.net/elecraft_pcb_scans.htm and you will find images of
the KDSP2 board.
I can;t help with the black contrasty schematic, but if you download the
KDSP2 manual in .pdf format, you can enlarge the
Not that it hasn't been a wild ride with Dayton and allbut that
will be two weeks ago, well, today!
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On Wed, May 28, 2008 at 11:49 AM, Bill Tippett btippett at alum.mit.edu wrote:
Elecraft will eventually publish some instructions regarding 5-pole filters for
diversity, but my understanding is that the peak variation between 500
Hz filters is a maximum of 50 Hz. My guess is that they'll simply
Larry,
It is difficult to judge what the output should be with the N-gen -
there are just too many variables to draw any valid conclusions from
that information.
I suggest that you back up a bit and align the bandpass filters in
transmit at a power level of 1 to 2 watts. Use the band order
Eric,
Tnx for the info. I just measured R33 and R40 - 6.3 ohms. At this stage
does it matter whether I leave the shorts in place or should I solder these
two resistors back?
N2TK, Tony
-Original Message-
From: Eric Swartz - WA6HHQ, Elecraft [mailto:[EMAIL PROTECTED]
Sent: Wednesday,
On Wed, 28 May 2008 13:08:35 -0400, N2TK [EMAIL PROTECTED] wrote:
Interesting that the mod levels of the board aren't reflected by the serial
number.
[snip]
When I ordered the mod kits for my factory built unit (806) by email, they wrote
me back and said I didn't need the changes.
Gary Hembree wrote:
On Wed, May 28, 2008 at 11:49 AM, Bill Tippett btippett at alum.mit.edu
wrote:
Elecraft will eventually publish some instructions regarding 5-pole
filters for
diversity, but my understanding is that the peak variation between 500
Hz filters is a maximum of 50 Hz.
Bob,
Other than cutting traces or removing chips, there is no easy way to
check for such a shorted condition.
I do suspect that the MAX1406 chip (U4) is the one to remove first
because it is the most likely culprit. The EL5146 chip (U6) is also on
the suspect list.
Before desoldering,
Panos,
Can you create the same conditions when driving a dummy load?
If it happens only when using an antenna, then yes, your body may be
acting as part of the antenna system and can cause strange behavior.
73,
Don W3FPR
Panos wrote:
Operating my KX-1 for 8 months now I was more happy I
On May 27, 2008, at 9:28 PM, John Frerichs wrote:
Duhh! I'm so stupid! I remember reading in the manual that some
caps are marked with a zero and some aren't.
I still reversed Caps: 12/15 and 35/31. Cap 12/15 values are
560. Cap 35/31 are marked 560. Guess what I did? Yup. I read
Dear folks
I operated 80 meters SOSB with the K3, only with the 2,7 filter and the
equipment is really fb!!!
I noticed a problem on my tx frequency. Normally 100 hz upper.
I know that I made some mistake on the config, but probably some of our friends
have already had similar problem.
Best
Now I'm curious.
When I installed my 400 Hz filter, it had no
offset info on it. Is this normal?
73, Bob N6WG
K3 #811
- Original Message -
From: Gary Hembree [EMAIL PROTECTED]
To: elecraft elecraft@mailman.qth.net
Sent: Wednesday, May 28, 2008 10:52 AM
Subject: Re: [Elecraft] SV:
Yes. All of the 8 pole filters have a zero offset.
Its the 5 pole filters that have varying offsets.
73, Eric WA6HHQ
-
Bob Tellefsen wrote:
Now I'm curious.
When I installed my 400 Hz filter, it had no
offset info on it. Is this normal?
73, Bob N6WG
K3 #811
Hi Don
I was just about to send something to the reflector. Both the 1406 and
the 5146 had failed but I do not know why.
However the solution was :-
- find out which chip was crowbarring the 5v line. Pull the PIC - it was
OK in my case. Cut pin 16 on the 1406, check and resolder if OK (it was
Nice work, Bob.
I've seen 78 series regulators die with over voltage but never over current
or temperature, they have excellent protection for those.
David
G3UNA
- replace the 78L05 as its not clear how much abuse it had suffered.
73 Bob G3PJT
Bob,
Great work.
The EL5146 can be ordered from Elecraft, and if it has been discontinued
in the DIP package, the SMD equivalent will be supplied mounted on a
carrier board to adapt it for thru-hole use.
If you have the K60XV installed in your K2, the use of a non tri-state
op amp will
Sold now -- thanks!
WA6L wrote:
I have a cable for sale to connect your K3 to a microHAM microKeyer or
microKeyer 2. The part number is DB37-EL-K3.
$50 shipped to any USA location. Paypal or check/money order. Contact me
off-list for additional details.
I will also be selling
Does the 2nd receiver option for the K3 come with at least one filter,
or does one have order that additional with the 2nd receiver?
Jerry -n6jp-
--
[EMAIL PROTECTED]
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My choice:
Main RX: 2.7 / 2.1 / 500 / 200
Sub RX : 2.7 / 400
73
Arie PA3A
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comes with 2.7KHz as standard
--
Man is the best computer we can put aboard a spacecraft and the only one
that can be mass produced with unskilled labour.
-Wernher von Braun, rocket engineer (1912-1977)
On 28 May 2008, at 21:14, Jerry Lockett wrote:
Does the 2nd receiver option for the K3 come
TF3KX wrote:
Now, do you give any insights on how this was achieved? Working contests,
odd hours, simply lots of time on the air, using announcements of
DXpeditions, clusters, studying propagation, etc.?
73 - Kristinn, TF3KX
Hi Kristinn,
Although I've been a ham for 41 years,
Hi Folks - I was wondering if there were any more detailed pictures of the 2nd
receiver board with the RF plate removed?
Thanks! Paul w9bbr
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Many tnx to Tom, N0SS for guidance on how to setup the split ops and
locking VFO B.
Here goes:
A B; hold SPLIT; hold B SET; hold LOCK; hold B SET to return upper
display to VFO A.
Now VFO A can be used as big boy RIT without bumping (moving) xmit freq.
If QRM drives you to another freq,
Yep, but that's NORMAL operation for me, a legacy of using a separate TX and
RX.
ODD operation is messing with the RIT knob. I avoid it.
The LOCK feature is important: it's pretty easy to bump the VFO B knob. One
had to really flail about to hit the VFO knob on a transmitter in a separate
box
Thanks, Bill, for the good info. I'm learning something new from this.
73
Orin N5ORT
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Dick Roth KA1OZ wrote:
Greg wrote:
Try this...
Starting with the power OFF. Turn it ON but HOLD the power button for
about 10 seconds...till you see MCU LD on the LCD. The LCD will not
be lit. This is a forced MCU load state. No using your K3 utility
program in advanced mode, load JUST
Hi Everyone,
I own K3 #371 and have entirely delighted with it and the Elecraft
experience to date.
But I do have a small nit to pick with the HACG mod and some comments
posted earlier today.
After doing a lot of pre-modification research on my #371, I determined
that the mod had been
Hi Everyone,
In hanging around the K3 booth in Dayton this year (some would say I was
'lurking' around the booth) I overheard several K3 prospective owners
pressing Wayne on the absence of dedicated bandswitches and bandstacking
registers.
Having been a user of Icom and Ten Tec gear for
Don Wilhelm wrote:
Can you create the same conditions when driving a dummy load?
If it happens only when using an antenna, then yes, your body may be
acting as part of the antenna system and can cause strange behavior.
I had the same problem as Panos when I was trying to operate K6DGW/MM
Hi Dave,
Dave you indeed had an unfortunate experience!
After doing a lot of pre-modification research on my #371, I determined
that the mod had been done, only partially, before it was shipped to
me. The R33 and R40 were still in place and not removed or jumpered as
the mod instructed.
Dave: (Another fine LQ)
I'd still prefer the ICOM/TenTec method of bandswitch but maybe once we get
the LP-Pan and PowerSDR running full time, band changing will be 'point and
click'. I plan to use a dedicated PC for the K3 and a separate PC for
internet and other forms of entertainment. I
I have a somewhat similar philosophy. I ordered the second receiver
without additional filters. When/if Elecraft introduces their
variable-bandwidth CW filter I will order one to replace the 500 Hz
filter I now have in the main receiver, and put the 500 Hz filter in the
second receiver.
Al N1AL
It seems that without the compressor it is difficult to obtain full SSB
output. I'm listening to a guy right now on 160m in QSO. He had is
compression on and as can be expected, was picking up plenty of fan noise
from his amplifier. He was advised to turn off the compression. This he
did and
Ed Muns, W0YK wrote:
10. Another issue, already on The List, is the inability to adjust many
of
the controls during transmit. This is VERY limiting in a contest
environment.
Yes, very. And if you press most any of the buttons while there is a CW
signal being transmitted the CW
Hi Steve,
With LP-PAN, Ham Radio Deluxe and PowerSDR, K3 rig control is indeed point
and click You can change bands on the K3 buy clicking on the associated
band buttons in PowerSDR. In addition, PowerSDR provides 3 band registers
per band (aka Icom). You can change modes and frequency by
Thanks again to all who responded on- and off-line to this subject.
Two things I learned here: There are external keyers that provide superb
support for high performance contest software, but also, great software can
indeed produce great CW over serial or parallel ports without the extra
Only a test
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Help:
After messing around with some 56/560 pF caps that were installed in opposite
places I now have a fully functional K2/10 CW rig on my desk. I'm listening to
the wonderful sounds of CW on 20m with it. This radio rocks!
Many thanks to those that responded to my question about the 80m/17m
For about the 3rd or 4th time I've tapped V-M, selected a memory (on of
the 60m spot frequencies, the only global memories I have), rotated the
VFO dial, and then tapped V-M again and overwrote the memory with the
current VFO setting.
Once the 2nd RX gets out it would be nice to get some
I posted this idea on May 9. I got several favorable replies and
thanks for it. I still find it very efficient, so I offer this again.
There is plenty more memory space left to add data bands.
-
A complete BAND SWITCHING scheme using 23 memories
I tried
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