As I am listening/working at a certain frequency I sometimes use one of the
memory buttons to check another frequency. But how do I then return to my
original frequency? My ‘other’ rigs go to ‘memory’ or ‘memory tuning mode’ when
a memory frequency is accessed. Cancelling memory mode brings you
Wayne
I will be doing all the mods for Christmas. Hope you can give us the info
really soon so I don't have to take the K3 apart again. Can you just point
to the circuit and tell us what you intend ahead of the official mod
instruction?
73
David
G3UNA
To this end, we're working
on a
Hi David,
Lyle, KK7P (who designed the KIO3 board set) will create an application
note and post it as soon as possible.
The short version is: put 1/8-W (or larger), 470-ohm resistors from
each speaker output to ground. (The actual value isn't critical;
anything from 330 to 1000 ohms would
Well I finally bit the bullet and did the audio- and ALC-mod hardware
updates to my SN308 K3, including adding pull-ups to the band-data outputs
(optional mod in the ALC instructions). I'd already done the HAGC and CW
rise-time mod a few months ago. While I don't use ALC with my K3/ALS-600, I
I second that
73 de M0XDF, K3 #174
--
The problem with being sure that God is on your side is that you can't
change your mind, because God sure isn't going to change His. -Roger
Ebert,
film-critic (1942- )
On 20 Dec 2008, at 11:53, Phil Debbie Salas wrote:
So - Now after two mod processes
Phil amp; Debbie Salas wrote:
So - Now after two mod processes plus installation of the KRX3, my cabinet
screws are starting to show a little wear. Maybe Elecraft should offer a
small kit that just includes replacement cabinet screws (top-and
side-cover
especially) for those of us
I believe both the Pan Head and Flat Head chassis screws are already set up
on the Spare Parts and Mod Kits page under Miscellaneous,
VirtualReality
I tried to FTP the the above updates, but it looks like one can't
download the screw packages and install them with the K3 Utility.
So - Now after two mod processes plus installation of the KRX3, my
cabinet screws are starting to show a little wear. Maybe Elecraft
should offer a small kit that just includes replacement cabinet screws
(top-and side-cover especially) for those of us who keep taking our K3s
apart.
My unit,
~
N2CQ QRP CONTEST CALENDAR
December 20, 2008 - January 19, 2009
~
80 METER FOXHUNT (CW) *** QRP Contest ***
Each Tuesday Thru Mar 24
9 PM to 10:29 PM Eastern Time USA
Info:
Someday I'll be sitting at the operating desk preparing to call a rare DX
station when my new Elecraft K22 will suddenly fade into nothingness in
front of my eyes just as a disembodied voice comes from the phones,
Finished installing automatic updates. Starting mandatory reboot.
It sounds like
A key objective of the procedures is to make sure everyone with normal
skills and tools can do the job cleanly and correctly the first time.
It's the same trade-off used for important tasks anywhere, whether the
worker is an astronaut working on the ISS, a surgeon in the operating room,
or an AE
I'm trying out RTTY for the first time today during the OK RTTY contest in
preparation for the upcoming RTTY RU in a couple of weeks. I have used MixW
running AFSK for years on my FT1000D to the extent that I got quite used to
the visual signal spotting aspects of the waterfall display. I
In DATA AFSK you can press the PB2 button to toggle the dual passband
filter on and off. This will open up your waterfall display when the
dual narrow filter is not in use.
DATA A is also perfectly valid for RTTY operation.
73,
Lyle KK7P
___
Lyle Johnson wrote:
In DATA AFSK you can press the PB2 button to toggle the dual passband
filter on and off. This will open up your waterfall display when the
dual narrow filter is not in use.
DATA A is also perfectly valid for RTTY operation.
I was also playing the the OK contest last
Hi Ron,
Someday I'll be sitting at the operating desk preparing to call a rare DX
station when my new Elecraft K22 will suddenly fade into nothingness in
front of my eyes just as a disembodied voice comes from the phones,
Finished installing automatic updates. Starting mandatory reboot.
Of
Yes I just tried AFSK-A with the DPB filter off and the bandwidth opened up
and it seems to provide the same comfort level that I had on LSB. Aside from
the advantages of having the levels set differently from LSB and the
compression turned off is there a received signal advantage to using Data
Now that I have the KRX3 installed and have been playing with it a bit...
It is quite a new thing for me to have a sub RX that is useable as the run
RX or as an SO2V search pounce RX with good selectivity. I would be
interested in knowing how others have used the KRX3 in a CW contest.
One
Price reduced, K2 with almost all options and/or KPA-100 + KAT-100 in
EC-2 case for sale.Available separately or as a complete station,
additional savings if you purchase all of it at one time.
Several additional K2 accessories available separately, with or without
the base rig.
Mike K2MK wrote:
Yes I just tried AFSK-A with the DPB filter off and the bandwidth opened
up
and it seems to provide the same comfort level that I had on LSB. Aside
from
the advantages of having the levels set differently from LSB and the
compression turned off is there a received signal
Although a little screw wear is inevitable, the wear will be much less
if a proper fitting screwdriver is used. The screwdriver points do wear
after a while, so the purchase of a good new #1 phillips screwdriver is
my recommendation. When the screwdriver point will no longer hold a
screw
Thanks to the G; whomever it was,,, for the hint on the removal of the choke
( audio output mod).
That was to turn the set upside down ... use my fantastic solder
suckerthen drop the old part into the set . This rather than
having to remove the 2ndRX to get to that choke.
Then put the
Well I'm really glad I posted this question. With the contest running I was
able to try the suggestions and I've learned a lot. I'm now using the data
mode AFSK A at a wider bandwidth when activity is light. I can narrow the
bandwidth as activity increases.
I implemented settings in MixW
The frequency is plus or minus the QRM. Note the start time of
1000 hours to try and minimise European QRM.
73 Dave, G4AON
K3/100, Acom 1000, dipole
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Post to: Elecraft@mailman.qth.net
You must be a subscriber to post to the
I received the KRX3 and the DVR today and am about to upgrade my k3. I am
using the 2.7 if roofing filter in the main unit and requested and paid for
a matching filter for the sub receiver.
The main receiver offset is -.97 but the new 2.k filter is marked -.93.
My question is are these a match
I just ran into this by accident.
http://www.ameritron.com/catalog/Ameritron_2009.pdf
See page 9.
No stated expected delivery
Not enough specs for my liking, but still, rather interesting.
Is this contest grade? Who knows?
de Doug KR2Q
I have no vested interest in this company.
I just completed the same installation Bill. I bought an additional 500 Hz
filter and paid to match two filters. They both matched exactly to my original
filters. My installation went pretty well. My DVR seems to work, but I have
not been able to find any instructions for operating. Maybe
Guys, i need your advice. At our Clubstation, while i was on 40m with
the K3 and a Dipole, another guy transmitted with the 2nd setup, a
TS-850 / TL 922 / vertical-ant on 80m.
I saw a HI RFI flashing and the rx went deaf. Resetting the K3 did not
help, also shorting out the gas-discharge diode on
Out of curiosity, is the dual PB done in IF or audio?
Dan - N3NDHappy Holidays
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Subscriber Info (Addr. Change, sub, unsub etc.):
Cannot get this set up to run FSK properly. Transmits fine. Receives and prints
on the K3 display fine.
The problem is printing received signals on MMTTY screen. Only prints
gibberish. Any suggestions out there?
73
Bob K4LW___
Elecraft mailing list
...My DVR seems to work, but I have not been able to find
any instructions for operating.
From the latest beta firmware release notes [with slight editorial from
me ]:
Support for Digital Voice Recorder option (KDVR3):
Note: The following information is more accurate than the DVR
What catches my eye is that comparing the amps on page 1 and page 9, you
have to pay $2,000 more for an additional 1.7 dB of gain with the amp on
page 9.
Sure. you have to know how to adjust an amp and actually tune the one on
page 1 whereas the one on page 9 is no tuning (assuming the antenna is
I hesitate to write this for fear of scaring off some potential modifiers,
but the story is good and positive.
I did all 3 of these mods today. (The stereo speaker mod was outlined in a post
from Wayne). After reassembly the radio worked fine and I was able to set the
amplifier ALC just
Thanks Toby,
I emailed Katie but she is on vacation. I thought perhaps someone in the
design group , Eric, Wayne, or Lyle would know about the filters.
-Bill AA1O
- Original Message -
From: Toby Deinhardt dj7...@muenchen-mail.de
To: aa1o aa1o.ra...@comcast.net
Sent: Saturday,
The main receiver offset is -.97 but the new 2.k filter is marked -.93.
My question is are these a match or did I get the wrong part?
I think you may have received the wrong filter. At this point, I'd
install the new filter in the KRX3, but set the Main and KRX3 offsets to
-0.95 (split the
Thanks Lyle,
I will go ahead as you suggest.
73 and Happy Holidays to you and your family
-Bill AA1O
- Original Message -
From: Lyle Johnson k...@wavecable.com
To: aa1o aa1o.ra...@comcast.net
Cc: elecraft@mailman.qth.net
Sent: Saturday, December 20, 2008 7:39 PM
Subject: Re: [Elecraft]
As noted on our orde form, our matched offset filter spec is to within 40 Hz or
less, since our 5 pole crystals can vary in center frequency from batch to
batch.
Set the offset for the two filters identically to the nearest 10 Hz value half
way between the two offset values. In your case,
The main receiver offset is -.97 but the new 2.k filter is marked -.93.
My question is are these a match or did I get the wrong part?
I think you may have received the wrong filter.
Shows what I know. The matching spec is to within 40 Hz, so you in fact
received the correct filter.
Which
Who can afford almost $3K? Ham radio getting way outta my league!
73,
Sandy W5TVW
- Original Message -
From: DOUGLAS ZWIEBEL doug...@gmail.com
To: Elecraft Reflector elecraft@mailman.qth.net
Sent: Saturday, December 20, 2008 4:30 PM
Subject: [Elecraft] OT: new SS amps
I just ran
Ron, there are other considerations. The tubes available today are made in
China. I had very bad luck with two sets of Taylor brand 572Bs that were made
in China. One set never worked at all and the other set lasted about a month.
I am still using the 572Bs that I bought in 1976 used. So,
Sandy, did you ever take a look at what a kilowatt amp cost in 1955? It would
be more than than $3,000 when $3,000 was a year's pay for most.
Willis 'Cookie' Cooke
K5EWJ
--- On Sat, 12/20/08, Sandy ebj...@charter.net wrote:
From: Sandy ebj...@charter.net
Subject: Re: [Elecraft] OT: new SS
That is why many hams built their own amplifiers back then - a pair of
813s could be obtained for $25 or less back then and there were surplus
transformers available at a reasonable cost. There were several pair
of 813s in Grounded Grid circuits published back then, followed by the
'pair of
K2 S/N 00502. Version 2.04P/1.09; KSB2 1.08b.
Options furnished: KAF2; KSB2; K160RX; KNB2; KAT2. Kenwood hand
microphone. Documentation and manual included.
Updated and recalibrated November 2007 by Gary Surrency AB7MY of
Elecraft. Rig works very, very well. Excellent condition.
$695
Wanted to trade for an Elecraft KX1 with all options or Elecraft K1-4
with options. An Hi-Q-Antennas NVIS dipole [or two mobile verticals].
Equipment is heavy duty, well machined, snaps apart with bayonet mounts
and the tripod mounting head is for NVIS. Mobile mounting bracket(s)
would
No, but a popular mobile amp that ran 600 watts were selling for
considerably less. I used a Henry 2K-2 for years until it good too damned
heavy for this old man to horse around! I now have an Ameritron AL-811H
Much lighter and 500 watts is very adequate. Will run more, but why do it
as the
Good Evening,
I better get this out before the power and phones go out. I am currently
charging the battery to get it as charged as possible. The inevitable power
outage will occur some time either today or tomorrow. Our weather is rather
wintery here ;) On top of my two feet of snow I
DOUGLAS ZWIEBEL wrote:
I just ran into this by accident.
http://www.ameritron.com/catalog/Ameritron_2009.pdf
See page 9.
No stated expected delivery
Not enough specs for my liking, but still, rather interesting.
Is this contest grade? Who knows?
Just a couple of things:
1) Unless all of
Well the ALS 600 I had did not put out 600 on all bands. It was especially
down on 80 meters more like 425 to 450 watts although plenty of power. I
understand this is typical with the 600 so it makes me wonder if this amp
would truly put out 1200 on all bands or even miss 1000 on some bands.
Kind
I bought my 572Bs about ten years ago, 10USD for each one. After 5+
QSOs, I replaced it about 3 years ago. Not bad for 30USD investment. I was
heard the new 572B is not as good as ten
years ago, that is only because the dealer (in US?) need more cheaper 572Bs.
All the best!
David BA4RF
On
Firstly
Got the K3 assembled. The transverter board was back ordered and so
is the subreceiver so I will be re entering the K3 and adding to it
at least twice over the next few months. I'm not looking forward to
the disassembly re-assembly but doing the kit sure gave me a great
appreciation
Yet again, from tonight's reflector digest:
So - Now after two mod processes plus installation of the KRX3, my cabinet
screws are starting to show a little wear. Maybe Elecraft should offer a
small kit that just includes replacement cabinet screws (top-and side-cover
especially) for those of
Hello Gary, and congratulations! Opening up the K3 again is not nearly as
traumatic as you might think.
The POWER control will *ask* for more than the rig can deliver. It's spec'd
at 100 watts, and that's what is guaranteed. The K3 can make a bit more than
100 watts on most bands, but that's all
With 8 x MRF150 the ALS-1300 has the same transistor component
at a Quadra ... and probably the same power output. What is
lacking is six meters, the tuner and QSK.
As far as the band decoder ... ALS-1300 will be +12V to select
band (all on one RJ-45) vs. Yaesu format BCD for the Quadra
I got following data with IFR AM/FM 1600:
K3 sn1302
POWER SET(W) POWER OUT（W) Difference ERR(%)
0 0.15 0.15
0.1 0.15 0.05 50.00%
0.2 0.3 0.1 50.00%
0.3 0.31 0.01 3.33%
0.4 0.4 0 0.00%
0.5 0.51 0.01 2.00%
0.6 0.63
Ron
A crowbar circuit is used to disable the power supply in the event of over
voltage. The current limit is what would limit the current output of a
power supply.
A typical crowbar circuit uses a SCR triggered by a voltage sensor. The SCR
conducts and shorts the output of the supply.
After measuring the TX IMD on SSB I stopped putting the
radio above 100W.
IMO the K3 should be limited to 100W, it is sad to see
it isn´t.
My advice would be, on SSB never go above 199W, on CW
it doesn´t matter.
Please Elecraft, make a FW change and limit the radio
to 100W, thanks!
/ Jim SM2EKM
After reading about the TXG VCE parameter I reloaded MCU 2.73/DSP 1.98
and attempted to adjust the gain back to a reasonable level. By setting
TXG VCE to -3.0 dB I came close to my requested power output on the K3's
meter, when set to 40w I get between 4-5 bars on the graph. This is
with the
Sorry made a typo. 199W should be 100W.
Jan Erik Holm wrote:
After measuring the TX IMD on SSB I stopped putting the
radio above 100W.
IMO the K3 should be limited to 100W, it is sad to see
it isn´t.
My advice would be, on SSB never go above 199W, on CW
it doesn´t matter.
Please Elecraft, make
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