Is there an easy way for the KRC2 and K3 to give an output for 6m? My problem
- quite common I expect, is to switch antennas between HF and 6m. I bought a
KRC2 and have just finished building it. However,I find there is not a 6m
output. I suppose I could work on the NOT 6m principle and energise a
I think there is a misunderstanding of the meaning of the word "Band".
The higher bands for example refer to the bands in terms of frequency. The
20m band is in terms of wavelength. However, no bands are officially
described in terms of wavelength any more. Not since 150m and down! Look at
all b
If you only have one K3, wouldn't one transverter be enough if coupled with
one of the surplus 6 way relays? I believe the K3 firmware lets you use a
single transverter for many bands in this way.
Mike
Dave Smith-21 wrote:
>
> Friends,
>
> I need four additional Elecraft Transverters to comp
I see several suggestions already, mostly involving building circuits. That
is fine if you wish but you could also just connect together the key lines,
using diodes to isolate them from one another, and making sure you respect
the current and voltage ratings of the key line. Both amps will of cour
Those of us with the 10W model could usefully bolt a 12V gell cell to the top
panel using the space not occupied by the KPA3. That should make it heavy
enough not to slide around and the radio could also be self powered like the
K2 with the battery...
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Kobranov wrote:
>
> Hi Mike,
>
> your problem is in SSB or also in CW mode or in both?
>
> There are no visible spikes on DB6NT 144MHz transverter/25W out.
> Firmware 2.10 now implemented.
>
> 73!
> Lexa, ok1dst
>
> AD6XY - Mike napsal(a):
>> Thanks for t
old firmware and the system is working.
The overshoots are still there as you adjust the power control but they are
much smaller.
Mike
AD6XY - Mike wrote:
>
> I have come across a problem with my K3 driving an XV50 converted to
> 70MHz.
>
> The K3 low level output from the KXV
I have come across a problem with my K3 driving an XV50 converted to 70MHz.
The K3 low level output from the KXV3 produces high power spikes before
settling to the correct level - which it then holds until you change mode,
or power setting. It also produces spikes at full power ( a few mW) as yo
Absolutely. Do it.
Phil & Debbie Salas wrote:
>
> "While working on the next revision of the owner's manual..."
>
> I wonder if it would be a good idea to include a table with popular
> microphones and what the settings should be (Elecraft, Kenwood and Heil?).
> Just because there seem to be
Dan Atchison wrote:
>
>
>
> Yeah, I know, it's only $125, but I'm a cheapskate.
>
> 73,
> Dan -- N3ND
>
>
It is not only $125. It is $125. This is a lot of money for something
essentially unnecessary to you. That $125 could be much more usefully spent
on a better CW filter or if you do no
Of course, the FM filter can be used for AM transmit. All you need to do is
tell the radio it is an AM filter. It will not know otherwise.
There is really no reason not to transmit wide band AM, just like there is
no reason not to transmit wideband SSB. The modes are perfectly legal in
most of th
I have just fitted two option filters to my K3.
I have FL1 FM, FL3 2.7 std, FL4 400Hz 8 pole.
Setting up the filters by mode I noted a strange effect. AM,FM and CW were
as expected. On USB I set the filters available to FL1 and FL3. I was
listening on 20m but each time I changed mode and back I
Traditionally this is a particularly hard measurement to make unless the
filter performance is very poor.
Without professional test gear you will need to obtain or build two very
high quality signal sources, (say identical 7MHz crystal oscillators) at
least one of which needs to be tunable. Thes
Bill W4ZV wrote:
>
>
>
> AD6XY - Mike wrote:
>>
>>
>> So... to your figures. The 500Hz filter is 8 dB worse than the 2.7 kHz
>> filter out of band but at close spacings. According to the review it
>> suffers non-linearites not noted in the 2.7kH
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 is 8 dB worse than the 2.7 kHz
f
Hilberling does all this if you specify it.
Tom AK2B wrote:
>
> ..with chrome knobs and an LCD display so I can watch Oprah. Oh yeah, can
> you make it a little taller so I don't have to squint? Can you put a fan
> on
> top that blows a refrigerant to keep my beer cool? I know you're busy,
> bu
A really really good bandscope can be had through using the SDR-IQ from
RFSpace connected to the IF output of the K3. It can also record 180kHz
worth of the band. Non-computer based methods are also possible, but the
computer realisation is so much more versatile. The SDR-IQ software can
interface
When will you guys shut up trying to tell everyone else what to think?
We all know your views are the correct ones - just stop reminding us.
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K3KO wrote:
>
>
> I don't understand why people are so adverse to using the inhibit line
> provided by the K3.
> It will prevent hot switching.
>
> BTW people using AC relays should be aware that they will also operate
> just fine on DC. (115vac relays work fine on 24VDC). Once converted
A good book to read because of the lack of contacts possible for common
G-stations who are never "DX" to anyone? Not an issue for TF3KX.
Seriously, a wire dipole antenna and some means of attaching it to supports.
Open wire and coax feeder. A balun (I have the auto ATU). DC lead and PSU.
Key, Mic
Some lack of communication between Greg and Wayne I expect regarding the
published figures. Luckily, this is a simple thing to fix one would hope. I
sent in a list of relay transit times on 2nd April.
It was quite clear that 20mS was needed for the smaller coaxial relays like
the very commonly us
How come it does not say "Elecraft" on the display boot up?
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Yes - Great. Installed without problems. It does most of the things I have
been waiting for. Still not interfacing to the kettle but you can't have
everything
Is there a utility to allow me to upload a set of settings so I don't have
to go through all the config? I know I can backup and resto
Hi Hank
Please stop belittling what VHF types want to have as facilities. It keeps
happening and it is not very nice. It happened with the PTT delays and it
has happened with this facility request before.
Mike
hank k8dd wrote:
>
> I don't know about "Auto CW or SSB"
> I can hear the CW pileup
Why are you setting the band to 28 MHz? You should have set up the
transverter band first. If you had you would presumably have 144 on your
display and not 28.
It appears from what you have indicated you are telling the K3 to transmit
1mW on 10m from the normal antenna rather than to use the KXV3
Just solder them. Crimping is a bad idea unless you have EXACTLY the right
tool.
Mike
GM3SEK wrote:
>
> David Cutter wrote:
>
>>> Yes, the power cord parts are included with the K3 kit. This is one
>>>item that will require your soldering iron unless you have a good
>>>(ratcheting type)
The blindness of the HF only operator again?
FM is absolutely a majority mode everywhere but HF, but to have only heard 1
FM signal in 50 years implies not attempt to progress beyond HF.
FM is used all the time at VHF, though not for DX. That in Europe at least
includes 6m and up. There is al
Since we discovered how to apply string theory, we have been doing very well
with a couple of paper cups on each end of a string. This allows us to
communicate almost everywhere at any time, including yesterday. Sometimes
the strings get tangled and we have wide ranging nets. Quite often though
th
I was using the K3 with a CW decoding program to try and copy some of the
people transmitting at 40 WPM at the lower end of 80m tonight. I had the
spectrum view active and I noticed with the CW filter tuned to 600Hz with
150Hz bandwidth I could also see a spurious signal at 1800Hz and a weaker
one
I also noted the splatter problem - as well as the poor operators who are
unable to listen properly (a station in Singapore) vs the good ones (an
Italian) who can.
I think the reason for this close in rejection problem might be the shape
factor of the DSP. In my case, it was not spatter as we no
Yes - and Yes. It works very well.
Mike
W7is wrote:
>
> Anyone had any experience with the below and whether it would interface
> with the K3?
>
> SDR-IQ™ Software Defined Radio, Spectrum Analyzer and Panoramic Adapter
>
> _http://www.rfspace.com/SDR-IQ.html_ (http://www.rfspace.com/SD
Don't cut it off. If it will not come loose, work out where the hole is for
the grub screw and carefully make some holes in the grip at the same place.
Figure 45 in the assembly manual shows where the screw hold is relative to
the dimple.
Mike
Mike Scott-7 wrote:
>
> I have found that my VFO
All the boards I have seen have an issue number and a date. Not it may be
these are not updated. For example, I have a revision A transverter
interface KXV3. I assume (possibly incorrectly as I have the original board)
that the Rev B board is marked as such.
Not having version control is such a
They did.
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Great - But why only 6kHz and why can't one use the FM filter? It should
still be as good if not better than a normal communications receiver.
While I am at it - I want 10kHz audio bandwidth on SSB. This is for decoding
DRM.
Mike
Eric - WA6HHQ wrote:
>
>
> In response to popular demand, we'r
What is the recommended way to make up the connectors between the 15 pin K3IO
interface and a series of XV transverters?
There are other signals on the 15 pin connector not associated with
transverting. I am wondering how to make up a suitable cable to extend the
15 pin port and to add the transv
I agree an inhibit pin is a very good idea. One must always remember to
connect it of course. The system needs to fail safe. QSK is not used above
HF as much and a radio that automatically allows a delay is far safer than
one that produces power immediately unless an inhibit line is used. If that
ilter would be better but I am sure the DSP can cope with removing the
leakage from adjacent channels due to the 15kHz filter.
Mike
G4ILO wrote:
>
>
> AD6XY - Mike wrote:
>>
>> Most of these AM transmissions in the UK are very poor quality to begin
>> with. Not just
Most of these AM transmissions in the UK are very poor quality to begin with.
Not just the content, but also the audio compression and filtering. The
better the quality of the radio you use, the more you notice this.
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This is a mots worrying post. I think it demonstrates considerable ignorance
of the many and varied applications of the K3. There is so much more to life
than HF.
How do you suggest we speed up a waveguide relay to 10mS?
Fern Rivard wrote:
>
> Hi Ian and the group:
>
> I would suggest
Interesting point. I think it would take a firmware update. I also wonder
what happens with a transverter between or below existing bands.
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I have now fixed my problem. RFC1 was not soldered in properly. At first,
after much debugging of the schematic I thought it open circuit. It was only
when I came to remove it that it became clear what had happened. One end was
not soldered at all. A common problem with these large SMT inductors.
Yes Julian - you are right. There is no advantage in having a KPA3 for QRP
working. In fact, there is a bit of a disadvantage as it takes up space in
the case which you might be able to use for something else, like a battery
or a VHF transverter.
Regarding the price, at $450 + VAT it is not part
For the record - I can't get it to work either. If I calibrate the wattmeter
to 5 Watts on 20m it is quite a long way out on several other bands -
ranging from about 3W to about 7W. I am comparing it with an HP8484A so that
might be an issue as it is a microwave head, but I think it goes down to
b
Thanks for the responses so far. I am currently using a Z11 auto tuner at
10W.
Can anyone help me with a configuration setting? What I would like to happen
is for something useful to happen when I press the ATU Tune button on the
K3. What it should do is provide a low power signal and toggle a t
Any advice on which automatic ATU would match well to a K3 with an amplifier
(solid state) to around the 500W level?
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Or perhaps are just waiting for the 2nd receiver to appear in April?
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Elecraft ma
Good Spot!
Farnell also do them in the UK. I have also seen many available via Ebay.
I would not worry too much about them, they have their weaknesses,
especially their tendency to come apart from each other because of the lack
of a locking mechanism, but at least they are a standard now.
Mike
I tried on our 70 MHz band with my XV-70. The same goes for JT65 as used by
our beacons where I found the tuning very critical.
I thought nothing of this but maybe you have a point.
Some weeks later on, I tried decoding JT65 on 23cm via an Icom IC910 and it
worked fine. It may be the K2 filter
It is hardly surprising considering the US Dollar is so weak at the moment
and most of the parts are not made in the USA. Had Elecraft passed on the
complete fall in the Dollar, I suspect it would be a lot more.
Darwin, Keith wrote:
>
> While doing a quick scan of the K3 order page I noticed
I think it is an excellent idea.
Darwin, Keith wrote:
>
> Why not?
>
> How about offering the case in different colors? White, Gray, Black,
> Midnight Blue, Deep Red, Mauve? It would be a first in hamdom wouldn't
> it? I can't recall ever having a choice of color when buying ham gear.
>
It might be easy for you but 10W in Northern Europe into a wire dipole is not
enough to crack the pile ups.
I have given up trying to work them.
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I have heard a lot about the excellent performance of the new K3 in rejecting
nearby interfering signals.
Great performance in the receiver is useless if the strong signal nearby is
excessively wide. I hope to be that strong signal, so I hope I am not
transmitting a wide signal.
I wonder how eve
Funny isn't it. I suggest that we should not put down people who don't like
what we do and I become attacked myself by many Emails.
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That is very useful information Stuart. As a VHF operator I do not care about
the LSB response, but I do care very much about USB.
I think for most SSB use the 5 pole filter will be fine. SSB operating is
not like CW, filter shape factor is less important as you can't operate
within a filter band
My goodness - this is absolutely terrible. Someone posts an honest review of
their experience and loads of people attack them for criticising their baby
by not giving it full marks? I really expected more of the Elecraft
community.
Perhaps the transmitter is faulty - it is entirely possible the P
Is there a radio club in the Boulder area then? I am visiting this summer.
Depending on timing, I may have a K3 and it would be great to visit.
Mike
Augie Hansen wrote:
>
> From my posting from last week:
> - Ordered (with 50% deposit) 6 June 2007 with subsequent modifications.
> - Received
I would put it in the microphone lead.
The most successful method I have come across for improving readability of
signals when SSB is not getting through is to use CW. I would like to be
able to use my morse key in SSB mode without doing anything except pressing
the key. I know I can do this wit
While the figures are excellent, I suspect Elecraft will want to do better.
A dynamic range of 101 dB at 2kHz is remarkable.
I am surprised a crystal filter can take the power for a 140 dB blocking
dynamic range. The post mixer amplifier must have been very difficult to
design as I recon it wou
While I am not interested in this one - for fairly obvious reasons
considering the exchange rate. Does anyone else in the UK have one for sale?
Otherwise I will order one new.
Mike
paul.bradbeer2 wrote:
>
> Fully assembled and tested XV144 for sale within UK. Includes Crystal
> Oven, configu
Did Rob comment on pops and transients generated in the AGC and DSP?
That was the subject of his presentation at Dayton 2007, where he gave
many examples to show that "New IF DSP designs [can] seriously
exaggerate transient noise on weak signals... Some DSP radios make QRN
much worse."
http
And there I was hoping you were all coming to the Harwell Rally this weekend
in Oxfordshire.
http://www.ntay.com/hars/rally.html
Mike
Eric Swartz - WA6HHQ, Elecraft wrote:
>
> I'm flying to Orlando tomorrow for the Hamcation hamfest this weekend. I
> hope to see you all at the Elecraft boot
I do not think any of the replies so far have understood the question. How do
you program the radio to a specified delay producing RF after the PTT
signal. The minimum 10mS is far too fast for many applications, 50mS to
100ms is necessary.
Sequencing is absolutely essential for power amplifiers a
I could use one too. I have an XV50 which I may convert to an XV144 as I only
need enough power to drive a transverter. If you do not find an XV144, why
not convert your XV50 to 144 MHz? If you can build one you can rebuild one.
Mike
N2TK, Tony wrote:
>
>
> Looking for an XV144 for my K3. Wo
Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of AD6XY - Mike
> Sent: Saturday, February 02, 2008 4:05 AM
> To: elecraft@mailman.qth.net
> Subject: Re: [Elecraft] K2 - hang up problem
>
>
> Fixing it by changing bands and weak reception afterwar
Fixing it by changing bands and weak reception afterwards is the key to this.
No SSB is also a clue. I would say you have a problem in the switching
between TX and RX. It is not the RF side of things (e.g. switching diodes)
as it would not reset, it must be in the control signals. Somehow the +TX
Do we know if there are any plans to allow several outputs without an ATU?
It is not really worth getting the auto ATU for the K3 if you intend to use
an external amplifier or even a well matched antenna like a tuned loop or a
6m beam, but currently it seems to be the only way to get more than on
You might consider the multiple IO control output which will allow you to
control each transverter individually.
If not, how about using the transverter TX (or RX) RF output to carry both
RF and control by imposing a DC voltage on it then and tapping it off in
each transverter? This is easy, jus
If I just happen to be passing - will you show me how to fly?
Eric Swartz - WA6HHQ, Elecraft wrote:
>
> My plane, N914JB, is a 2000 182S. I bought it with about 600 Hrs on the
> engine.
>
> The other one one the flickr page, N733BG, is a refurbished 1976 172N.
>
> 73, Eric
> ---
>
> Sam B
Ken K3IU wrote:
>
> Eric usually updates it on Tuesday afternoon (Pacific Coast time)...
> today.
>
>
But didn't. I agree the lack of updated info is most frustrating. I believe
they are still working through orders up to May 14th, possibly now the ones
without deposits.
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This sort of thing is often a problem in 3rd world countries. A payment needs
to be made to the postal service for the privilege of paying tax. In the UK
via the post office this is a percentage of the tax or £8, whichever is the
greater. The real problem is that if everything is invoiced in one
Nicely done.
Did you use it in the AFS contest this evening?
Mike
Paul Webb-7 wrote:
>
> If any one wants a look , i took a load of photos while building my K3
> and have put them together as a video, i intend to put a voice over
> explaining the build but have not had time yet. anyway feel
How are you measuring those voltages? In any case, it looks like the driver
is not working. You will have installed a nylon standoff on it, I would look
for a short around that area.
Mike
Bo Andersson wrote:
>
> Hi!
>
> After building and installation of K60XV, I got problem with Hi Cur when
GB3RAL at 50.05MHz should be a good signal in Warfield. I do not know how
accurate it is, it is well beyond my ability to measure it here at home. The
reference it is driven from is locked to GPS with a long time constant and
should be close to one part in 10^10. However, the frequency is DDS deri
I have now completed my modification by installing the replacement power
module. The changes required to fit the new module are very simple, it is
just a matter of removing 2 links and one inductor and installing one link
and two resistors, plus the module.
Power output of 20W was achieved immedi
Also see http://www.mike-willis.com/XV70_Pt1.htm for some alternatives. This
document is not finished yet, I still need to document the power amplifier
conversion though this is effectively already documented in the most recent
XV50 manuals.
Mike
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Thanks Allan,
I have managed now to get to an output of about 0 dBm from the driver stage.
I have not got the power module in as I doubt it will work on 70MHz. I will
replace it with one that does. The 0 dBm is a little disappointing but I
know why and am working on fixing that.
The harmonic t
I'd be doing this on a new unbuilt XV50, so if changing coils is
> good and someone can document what that change is ...
>
> I'm quite capable of assembly, but not of design.
>
>
> AD6XY - Mike wrote:
>>
>> The coils should really change too but will be v
I am making good progress. I managed to find an XV50 locally to do a trial
conversion. I will end up with two but perhaps someone will want one of
them. It has taken 5 hours because I was also writing the documentation
which will be on my web pages.
So far, I have managed to get the receive side
I am working on it. My plan is to make as few changes as possible while
maintaining adequate performance. This will be a compromise but should make
it easier to modify existing units.
I will put the instructions on my web pages (www.mike-willis.com) when
ready. I have done the design work but I a
A repost since it has been some time and a few more people have K3s. I am
looking for a used or kit XV50 to modify for our European 70MHz band.
Mike
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Thanks for this update - I trust you had a merry Christmans and will have a
happy new year.
The thing of most interest to me is what is a realistic last order date for
K3 parts to be collected at Dayton (assuming you are going to Dayton). I am
thinking in particular here of items like the secon
Can I vote for none at all?
Elecraft are likely to make a loss from reselleing Heil and in any case
their elements are readily available elsewhere.
It would be more appropriate to design a sophisticated DSP based microphone
equallizer that could take a professional quality microphone, that is
I wasn't posting to anywhere - I was and am using the web interface to the
list. According to that - the Email you replied to was rejected - so how you
got it is a mystery.
Mike
G3YMC wrote:
>
>
>
> AD6XY - Mike wrote:
>>
>> The following messa
Almost - but in practice the problem is that it can't hold very much, not a
K3. The case itself weighs 5 kg. The total weight limit is frequently 6kg or
7kg. Some airlines allow more but it is variable.
The maximum size is OK. The limit is 22in x 17.7in x 9.8in. The storm case
is 21.7 x 14.1 x 8.
Does anyone have a spare transverter interface KXV60?
The background to this is that I was thinking of buying one via Elecraft,
but unfortunately the the shipping is only $25, the least worst option is US
Postal service, which to the UK means delivery by the dreadful Parcelforce*.
That will add
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