hermit-4 wrote:
I would like to hear from folks that have used the Par Electronics
EF-10/20/40 with any of the Elecraft qrp rigs especially the KX-1.
Not an Elecraft rig and using the older 2-band version EF-20/40:
http://users.vnet.net/btippett/cataloochee_divide_trail_qrp.htm
Nice
knob. Both are
~4...which explains why the K3 felt very natural to me. I do have big
hands (~10 thumb tip to pinky tip) so this probably doesn't work for people
with smaller spans. BTW I suspect the 930/940 probably had more all time
units in the field than any other rig.
73, Bill W4ZV
Dick Dievendorff wrote:
A configuration from one version can be restored to a different version.
If you haven't stored a working configuration using Dick's Configuration
Save utility in the K3 Loader, I highly recommend you do so. I've made a
habit of periodically saving my
Bill W4ZV wrote:
I used a TS-930S for many years and learned to depress TF-SET (Kenwood's
equivalent to REV) with my left index finger and tune the Main VFO with my
left pinky. Since I found it very natural to do the same with REV in the
K3, out of curiosity I actually measured
If I were looking for a 1.5 kW tube amp today, I would look for one using
either two 3CX800A7 (peak-rated 3CPX800A7) or one 8877 (peak-rated
3CPX1500A7). Reasonably priced Eimac pulls from periodic maintenance of MRI
equipment in many hospitals ensures they should be around for quite awhile.
Ian White GM3SEK wrote:
No, I do not want any new menu affecting the REV button!
Please leave the REV button exactly as it is now, for those who like it
that way.
But if the sub-rx is not installed, please also make the unused SUB
button do the same as the existing REV button.
G4ILO wrote:
I'm just wondering if there are any advantages to using the PA when
running QRP. As I understand it, the PA is switched out of circuit until
you dial the power above 10W, just as in the K2.
The switch point in the KPA3 is actually 13W. For 12 and less
it'is
GW0ETF wrote:
I wonder if there is a good reason why the REV function couldn't be
allocated to one of the ACC pins and operated by a foot switch.?
For those ofcourse that don't want to use a foot switch for PTT and/or
haven't got the second RX on order...(like me)
Good idea! I
W7is wrote:
If your interested in seeing the latest offering of a
contest grade transceiver, take a look at this link.
Reading their brochure is a real hoot!! During the next
10 days it will be making its official debut.
Not news. IC-7700 was announced about the same time
Does anyone in EU have any idea when Peter Hart G3SJX will publish a K3
review? Would be wonderful if he had one with all the various CW filters
installed for comparisons. Rob Sherwood is testing all now but has not yet
made the results publicly available (i.e. 500/400/250/200).
73, Bill
--
Barry N1EU wrote:
The Heil footswitch is FB quality and reasonably priced.
We must have a different definition of FB quality. I've owned
several Heil footswitches and they all eventually failed with stripped
pivot screws. It's a poor mechanical design. You can kludge a repair
with a
Ian J Maude wrote:
Can I redo the K3 config on 5W with the PA physically in place or do I
need to remove it? I am no at all happy with the output power so I want
to go through the config again. Like others, I find that on SSB, the
output does not peak at all well.
TX ALC is on but
Toby Deinhardt wrote:
In the manual, once you have finished the calibrations, it says to turn
off TECH MD.
You don't really have to turn off the TECH MODE. The manual, imho, tells
you to (suggests that you) turn off the TECH MODE, so that the chance of
changing a sensitive menu
rlpend wrote:
Is the binaural audio effects circuit schematic-or something generic if
the K3 circuit belongs to Elecraft-available so that I could make one to
use with another radio ( such as K1, SST, RM)?
Thanks--Bob N5JYW
Sommer,R. C. A Simple Effective Receiving Aid, QST Vol.
irritate my ears like some people but the EX-29 is definitely more
convenient to use. Either of these will run circles around Bose or any
other active noise-canceling headsets.
73, Bill W4ZV
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in wearing them for extended periods.
73, Bill W4ZV
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FWIW 73,
Bill W4ZV
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GW0ETF wrote:
According to the Application Notes Page my K3 #145 should have an ~8ms
rise time. However, viewed on my analogue 'scope the rise time (0 - 100%)
is definitely shorter and nearer to 5ms with a similar fall time though
with a sharper falling transition edge.
The notes
Bill W4ZV wrote:
The production start date for this mod could be in error on the webpage.
I know this issue has been known about well before S/N 211. My S/N is
early 100's and it definitely needed the mod.
I believe G4AON (K3 S/N 80) was the first to discover the CW rise time
issue
determine if your unit was
modified by looking for a discrete 1.8k resistor installed between C196 and
C197 as shown in the HAGC mod instructions. If that resistor is in place,
it's a good bet that C222 has been replaced as well, but a capacitance meter
will tell for sure.
73, Bill W4ZV
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worth, you can also get a DMM free.
http://www.circuitspecialists.com/level.itml/icOid/190
73, Bill W4ZV
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my 2.7k/1.0k/500 are in close agreement with the above measurements but
my 200 is slightly less than 210 Hz.
73, Bill W4ZV
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to risk
lifting a trace because of bad technique so practice first.
73, Bill W4ZV
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to set a new standard that the competition must now scramble to
match!
BTW I had to laugh out loud when I saw a new IC-7700 owner tout its 7.2
pound tuning knob! Gosh he could've had a K3 for only 1 more pound! ;-)
73, Bill W4ZV
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to experience this myself in the
coming years.
73, Bill W4ZV
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DOUGLAS ZWIEBEL wrote:
I can't, for the life of me, figure why anyone would want to listen to
cw with a really wide filter, but.
From K3ZO many time winner of Dayton pileup contests:
I just got back from Thailand so am reading all of this old discussion
for the first time, but as an
Darwin, Keith wrote:
By excessive, I mean having the DSP bandwidth wider than the roofing
filter.
What benefit is there? Do you really get that much more wide band data
downstream from the roofing filter? So far I've pretty much just forced
myself to stay at or below the bandwidth
, Bill W4ZV
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://www.sherweng.com/table.html
The K2 is a great little rig but it's frankly out of its league when you
start prowling 160 for weak signals in the presence of very strong local
signals.
73, Bill W4ZV
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charles-70 M0BIN wrote:
ERR TXF error message received when attempting low power calibration.
No power out on CW or SSB.
I have studied the trouble shooting pages in the Owner's manual but cannot
find the answer.
ERR TXF normally indicates CONFIG: FXTX is not set correctly (p.44
-100.
http://www.telepostinc.com/LP-PAN.html
73, Bill W4ZV
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and
the digital can then handle about 100 dB internally.
73, Bill W4ZV
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*not* reduce transmitted issues from a dirty
interfering TX signal. Jack K8ZOA is right that it depends on the exact
nature of the interference (i.e. is it transmitted [phase noise or key
clicks] or internal to the receiver [IMD, BDR or LO phase noise]?)
73, Bill W4ZV
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/adaptivepitch/ (there are a couple of other fun tests
too!)
73, Bill W4ZV
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Dave Blaschke wrote:
I have a question: after downloading and installing PowerSDR/IF I
find that launching it shown no GUI for the program. But I can see it
in Windows Task Manager, running as a process. I' must be missing
something here. Can someone give me some assistance with this.
! :-)
73, Bill W4ZV
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is well ahead of where Orion was at
the same stage of its product life cycle (6 months after 1st shipments).
Also, the addition of a $200 LP-PAN and $100 sound card will give a
panadaptor rivaling Flex-Radio's (since they both use the same PowerSDR
software).
73, Bill W4ZV
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Bill W4ZV wrote:
my guess is he may have had a pre-S/N 211 K3 (sans hardware AGC mod
announced publicly on March 27 with the mod implemented in production
units approximately mid-January).
G4ILO wrote:
I believe that some K3's later than S/N 211 do not have the HAGC mod. Mine
is S
similar front-end to the K3) offers an optional 300 Hz filter and Inrad
offers a 250 Hz. Your comments about the difficulty of manufacturing narrow
BW filters at VHF are correct.
73, Bill W4ZV
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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!
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
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
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
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.
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.
Just a word of caution for anyone planning to use CW Skimmer with the
K3/LP-PAN. If using the Softrock-IF mode, which is intended for
radios like the K3 with a fixed IF output, Skimmer has a bandwidth
limitation of 24 kHz (i.e. +/- 12 kHz around whatever frequency the K3
VFO is set to)...and the
ARRL once reported better IMD
performance with Preamp ON versus Preamp OFF. Common sense would say
TILT!
73, Bill W4ZV
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Jan Erik Holm wrote:
Yes something isn´t right. This was his measurements:
CLOSE-IN INTERMODULATION ON 7MHz band,500Hz bandwidth, CW preamp off
2.7 kHz roofing 1.8 kHz roofing 500 Hz roofing
2kHz +19dBm 101dB+12.5dBm 96dB+2.5dBm 88dB
3kHz +19dBm 101dB+12.5dBm
AD6XY - Mike wrote:
I have Radcom in front of me. The editor has two reviews, the K3 and a new
Alinco hand held. I suppose it shows the state of amateur radio in the UK
that the hand held makes the front cover. The K3 reviews very well
indeed.
So... to your figures. The 500Hz filter
Robert Tellefsen wrote:
Guess it's my turn to have a problem.
Rig here is K3 #811.
Options are KAT3, KXV3, KBPF3, 400 Hz 8 pole xfil.
My problem is that at turn-on I have every icon on the LCD display on
simultaneously, almost like an LCD display test.
Rig doesn't respond to any
max iw0gxy wrote:
I have almost the same probs on 1118 but mine showed during the synth.
calibration the following errors:
first E5 - ERR VCO
then E00255 - ERR VC4
I sent an email to support and waiting a reply.
My K3/100 has firmware 2.02 and it is fitted with 2 opt
W7TEA wrote:
I have the 500 and 200 hz filters installed. Most of the time I prefer
using the 500 hz filter even when narrowing the DSP filtering to 200 hz or
below. Is there an easy and fast way to engage the 200 hz roofing filter
during those rare occasions when it is needed without
needed.
73, Bill W4ZV
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You must
Tom Whiteside wrote:
I note in the new KRX3 manual the comment that diversity reception may be
enhanced by using filters with matched offsets for the main and
sub-receivers.I'm a 160M nut and this is certainly an important point
to me... I have these filterson backorder:
on 160.
73, Bill W4ZV
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Brett Howard wrote:
So am I to assume that the 8-pole filters are not going to need to worry
about this as they are all at 0 anyway? What is the advantage of
getting two matched pairs of 5-pole filters when you can get two 8-poles
for only 10 bucks a filter more?
I'm assuming that its
Mike Harris-9 wrote:
Interested in what power level is required to trigger the carrier operated
relay in the KRX3.
According to Wayne, +20 to +25 dBm activates the COR in both RX ANT (KXV3)
and AUX RF (KRX3).
73, Bill
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David Woolley (E.L) wrote:
Ed Muns wrote:
What DSP bandwidths were you using and where did you have your crystal
filters engaging? There is only a 65 Hz bandwidth difference between the
400 and 250 crystal filters and both are wider than the what is
needed
for 170 Hz shift RTTY. The
FYI, the DSP filter in the K3 follows the following formula for shape factor
according to Lyle KK7P:
Shape Factor = (6 dB BW) / (6 dB BW + 300 Hz)
Oops...no coffee yet. Make that
Shape Factor = (6 dB BW + 300 Hz) / (6 dB BW)
73, Bill
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David Cutter wrote:
Bill
I can't recall seeing that figure published before; where would I look for
that figure?
David
G3UNA
snip
The purpose of the roofing filter is mainly to reduce strong
(approximately
S9+30) signals from over-driving the ADC in the DSP. If they do
Björn Mohr SM0MDG wrote:
I find the diversity option interesting and I imagine that it will be a
very
useful feature on topband. In what other situations do you find it useful?
I have never tried diversity myself, what would the difference be between
a
filter matched to the specs
Eric - WA6HHQ wrote:
'Do' as in 'already do'.. ;-)
Our current DSL firmware is designed to provide an extremely fast VOX
that does not drop much, if any, of the first syllable.
Let me guess. Put the audio stream in a short delay line and offset the
initiation by the amount of time it
Joe Subich, W4TV-3 wrote:
Bill,
David you may be suggesting that in theory but I would pay
*close attention* to what W0YK says. Ed wins many RTTY contests
including several current world records from P49X, and results
sometimes speak louder to me than theory (and I'm an engineer
Val-LZ1VB wrote:
Well, my choice is high threshold, steep slope and low AF gain!
AGC THR 8
AGC SLP 4
Sounds about right Val! See the K2 AGC curve here about 2/3 of the way down
the page:
http://www.cliftonlaboratories.com/receiver_agc_curves.htm
73, Bill
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Brett Howard wrote:
Being tha t it was mentioned that best responses seem to be with a
roofing filter wider than 300Hz and then he mentioned the 250Hz filter
wouldn't you deduce that he meant the 370Hz filter which Elecraft calls
250Hz? I mean maybe I'm jumping to conclusions here but
Joe Subich, W4TV-3 wrote:
This is not the case based on careful measurements. The problem
is 'skirt sharpening' when multiple filters are cascaded. Where
a single filter might have a 6dB bandwidth of 225 Hz (200 Hz
roofing fitter), when combined with the 200 Hz DSP filter the
K6KR wrote:
I notice a definite qualitative change as the narrower filters switch in.
It
sounds quieter, and it seems like the volume is being turned down. I think
I'm responding to the reduced low and high frequency components that are
supposed to be cut off. The DSP-related changes seem more
Georgens, Tom wrote:
At this point, the K3 seems to have corrupted firmware, but it can no
longer talk to a PC in order to do a new download. Not sure what to try
next.
Don't panic! Disconnect the K3's APP power connector for a few minutes.
Then connect your true serial cable (not
Ignacy wrote:
Because FT5GA is weak on 40m I listen to it using the diversity mode. The
reception is much better. For transmit I attempted to use XIT. However,
with XIT the SUB frequency changes. Is this on purpose?
Ignacy
There's a simpler way to do what you want. Enter diversity RX
press REV,
the VFO A knob is temporarily unlocked so you can change your TX frequency.
Release REV and you go back to locked on the DX on VFO A. Very clever!
I used exactly this method to work FT5GA last night for DXCC #327 on
Topband. BIG SMILES!
73, Bill
Bill W4ZV wrote:
Ignacy wrote
Ian White GM3SEK wrote:
(Also a query about the resistor value: does it truly have to be 13K?
Is this potential divider so critical that it cannot use one of the
readily available standard values of 15K, 12K or even 10K?)
When the mod was first published I asked:
Just checking to see
Stewart Baker wrote:
Hi,
Downloaded and installed V3.35 V2.34 successfully.
However using the RF Gain calibration procedure in the
K3 Utility V1.2.8.10 seems to have messed up my Sub RX.
The Main RX is OK.
After using the Sub Cal the Sub RX is now very insensitive.
I have tried
Jim Harris wrote:
So far I've found no major issues other than S-2 noise on 20 meter where
it's not present on my IC-756ProIII.
Are you sure that's real noise or just the S-meter reading? The K3's
S-meter has excellent linearity whereas most other rigs do not (Flex 5000
excluded). S2
Mike Kasrich wrote:
TxG error is appearing only on 40m. xmit ok on all bands swr is fine.
but showing error on 40.
Check for a bad solder joint around the 40m toroids on the filter board.
You can probably scrape the insulation from top side with an X-Acto knife
and re-solder without
Jim HaRRIS wrote:
All four are equally quiet without an antenna connected and with a dummy
load connected. When connected to an antenna the K3 has about 2 S units
more noise indicated than the other radios connected to the same antenna
(A/B switch) and the noise level sounds about that
Don Wilhelm-4 wrote:
If you are doing weak signal work or working on a crowded band, I
suggest you opt for the maximum dynamic range by reducing the RF Gain
(and advance the AF Gain) so you can just barely hear the band noise.
But if your current operation is more casual, run the RF
Brett Howard wrote:
I really wish we could get a full listing of the modifications that
Elecraft is officially rolling into this DSP board revision. It doesn't
even have to come with rework instructions and pictures... Just a list
of value changes would have me pleased as punch.
Here's a link to a well-done video (~33.5 mins) of the 2009 Russian Radio
Team Championship contest in July. Most of you know the World Radio Team
Championship will be hosted by Russia in July 2010. Most the this video is
in Russian with a few English comments by Roger G3SXW near the end (~30
k1tl wrote:
Hi Gang,
Failed to mention that when the filter switches above 2.1KHz, the tone
moves
up the band and ditto when above 2.7KHz, the tone moves up a few KHz on
the
bandannoying to say the least...so the problem may be somewhere else
in
The movement is caused
Bill W4ZV wrote:
Have you tried CONFIG: SIG RMV?
This was implemented in MCU 3.03 / DSP 2.10, 3-17-2009...documentation here:
http://www.elecraft.com/K3/k3_software.htm
(K3 Firmware Release Notes, just above New Firmware Load Information)
73, Bill
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juergen piezo wrote:
Anyway its a nice dream, however this radio would be the best selling
radio in the world I would think. It would certainly make the new
Hilberling look like very poor value for money
Is there a new Hilberling (besides the canceled PT-8000)?
DM4iM wrote:
Elecrafters,
when you are on a Frequency working someone or calling , it may happen
that you accidently touch the RIT-Knob and --poof-- the qrg is gone.
Even if VFO is locked.
Very bad in a contest when you are running.
To prevent this, I switch on RIT (if i don't
Brian Machesney wrote:
Call me stubborn, but I believe that it should be possible to *make* the
K3
and a logging program work together as SO2R-in-a-box. This probably
involves external, switched bandpass filters, might involve an external
antenna switch and/or applying a context swtich
wayne burdick wrote:
It may be possible to do full duplex with the sub receiver on a
different band and antenna from main, since it's very well-shielded.
I'll give this a try. Some firmware changes will be required.
Remember that most folks who want to do this will be running full
diversity
in SO1R. True SO2R adds another level of complexity to an already
overloaded interface. Given this, I believe there are higher priorities to
work on with the K3 and save SO2R for a better human interface in the K4.
73, Bill W4ZV
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Jeff Maass wrote:
My electric company had a service-related power outage in my area for a
few hours this
morning, and so the DC supply for my K3 was turned off for one of the
first times in
several months.
When I powered the supply again and tried to turn on my K3, the display
does
jim danehy wrote:
I own K3 # 3355. Love it. Only thing I do not have is the digital recorder
and the sub receiver. I am considering the sub receiver. I read in the
operating manual that there is a -3 db loss when both receivers are using
the splitter (common antenna). Is that
rfenabled wrote:
I have done the CAL VCO again and for now, so far, the issue appears to
have gone and the K3 is acting normal
If you've not done the Synthesizer ALC Mod, you should do so. Even with
this mod installed, I recently had K3SYN unlock problems with my Main VCO
(and not Sub)
Larry - K2GN wrote:
I've sent several messages to the reflector that never get posted or
take more the 24 hours to post.
Always try to post in Plain Text and do not include attachments. Most
Mailman lists are set up to automatically trash rich text (i.e. HTML, etc)
or posts with
Roy Morris-6 wrote:
I have assigned a macro to PF1, and it works great. I now want to remove
this macro from PF1. Will the macro be removed from my K3 if I go in the
K3 Utility under the Command Tester/K3 Macros tab and push the CLEAR
button?
Roy I would try the following. First
The macro routines are a great addition to the K3. I've added two routines
that up until now, I was engaging manually through multiple button pushes.
I've slightly modified the Split+2 to also open up the Sub Rx and assign it
to a fast tap on button M1. Clearing that routine is
to keep their run
frequencies clear). :-(
73, Bill W4ZV
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Elecraft
is described in quotation marks on the page below, just above My
Experience.
http://mysite.verizon.net/vze7hjw3/id17.html
Hopefully Elecraft will eventually shed some more light on the serial
numbers and production dates that this problem applies to.
73, Bill W4ZV
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Chris Gibson-3 wrote:
On a small number of occasions recently I've been working (what I believed
to be) split on CW, and been embarassed to find that I've transmitted on
the
DX frequency. At first I put this down to senior moments, but now that I
have had the same thing happen on RTTY, I
Brian Machesney wrote:
I was just reading about the differing levels of success that people have
with active noise cancelling units. It occurred to me that one should be
able to achieve the same kinds of results using the second RX and separate
antenna in the K3 - with the addition of
Brian Machesney wrote:
I was just reading about the differing levels of success that people have
with active noise cancelling units. It occurred to me that one should be
able to achieve the same kinds of results using the second RX and separate
antenna in the K3 - with the addition of
Barry Simpson wrote:
Following my earlier post I have now found how to configure the sub
receiver
filters in K3 Utility.
For reasons you've discovered, it's a good idea to occasionally SAVE your
configuration using the K3 Utility. You can then RESTORE it if necessary,
including all
Geoffrey Downs-2 wrote:
A couple of years ago there was some correspondence on the reflector about
whether an S unit is 6db or 4 db and there appears to be historical
precedent for both but I have looked at the archive and can't find where
it
rested as far as the K3 is concerned. It
different than most rigs but, if
you think about it, it is better since the S-meter always read the true
signal level at the input terminal, before any gain or attenuation is
applied inside.
73, Bill W4ZV
--
View this message in context:
http://n2.nabble.com/Re-K3-S-Meter-tp4019422p4024549
Don Wilhelm-4 wrote:
If the K3 S-meter is calibrated with the preamp ON, and then ABS mode
is set on, the S-meter response for a 50 uV input will be S-7.
If one is going to use S-meter ABS, then it is best to calibrate the
S-meter for S-9with the preamp off.
This is because you are
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