I was a beta-tester. The kit I received included a BNC-F/sma-M
adapter. The cable to install has a sma-F connector. So you can go
either direction (BNC MM cable) or a cable with sma-M to BNC-M. I
chose the later (I already had a couple made) because it will present
less mechanical stress
I had intentions of checking it Sunday and monitored the preceding
net, but was called to breakfast about 30-min before net time (10am
local). I got reading the newspaper and missed the net.
I had an interesting contact earlier on 20m with W6SMJ/mobile south
of Visalia, CA coming from the DX
I ordered last Wednesday and curious if any have had there unit
delivered, yet? Does Elecraft send out tracking information with
shipments? I have order confirmation, but nothing further. Guess
I'm eager to get it!
I ordered several 7pole LP filters from CoilCraft for use with the
XG3. If
My XG3 came in the mail, today. Haven't played with it very much but
did connect it to +13v and set it on 14.020 at 0dBm into a 2m rubber
duckie (nice match - I know) and there is enough signal to hear
it. Note is not that of a sine wave but the buzz-hum of a square
wave. Certainly fine for
compare the XG3 with my 1296 signal source.
XG3: very nice!
Ed - KL7UW
--
Message: 44
Date: Wed, 20 Apr 2011 17:30:30 -0700
From: Wayne Burdick n...@elecraft.com
Subject: Re: [Elecraft] XG3 Arrived
To: Edward R. Cole kl...@acsalaska.net
Cc: Elecraft@mailman.qth.net
I can understand your disappointment. Even 100% testing can have
occurrences of random failure. Doesn't mean the factory or
technician screwed up. I recently bought a custom-made (for me)
transverter that cost me $600 and less than a week an IC shorted out
and killed the receiver. I was
If you didn't cut n paste n save this? YOU should.
I first saw the K3 at our own little hamfest (maybe 50-people) when
N6TR showed it off. The dual receiver and low phase-noise receiver
impressed me for application to eme. Tree answered many of my
technical questions. At the time I had no
I bought a 9volt battery for the XG3, today. Running at 0 dBm on
14.020 it puts out a nice clear CW note reading about S7-8 with the
XG3 sitting about a foot from the K3. I have a 2m rubber duckie as
antenna on the XG3 and the triband beam 50-feet above the shack on
the K3. I lowered output
I am using the LP-Pan on the K3 IF and its clock runs at
8.215x4. Actually, the later models of the LP Pan run at
(8.215-.006)x4 = 8.209x4 = 32.836 MHz. LP-Pan set up for radios
other than the K3 have a different LO to suit those radio's IF.
Minimum sampling rate needs to be 2x the IF
So could one insert a trap on 3.579 MHz to notch the offender? Are
the harmonics generated inside the receiver or where?
73, Ed - KL7UW, WD2XSH/45
==
BP40IQ 500 KHz - 10-GHz www.kl7uw.com
EME: 50-1.1kW?, 144-1.4kw, 432-100w, 1296-testing*, 3400-?
DUBUS
Phil,
I've listened in a couple times that KO5Y was NC and signals from him
are not strong enough to consider trying to check-in from
Alaska. Your location in the NW is much more favorable for me. I
know there are west coast assist stations but as long as I am running
QRP with the K3/10
It seems to me this supports the argument for using a laptop for
display. The LP-Pan would be ideal due to its small size. A
screenless compact version of the P3 would be as convenient. I
assume that laptops are taken on dx-peditions for logging.
73, Ed - KL7UW, WD2XSH/45
I am building some LP filters using 7-pole CoilCraft filters that I
am installing in custom-made copper enclosures with
BNC-male/BNC-female connectors. After I make and test a couple, I
might consider making some for sale if there is interest. No idea on
price, yet.
I bought an aluminum
came from england in 1652 so have tenuous links back there?
William's ham license would have an L in it for learner! ;-)
73, Edward R. Cole
KL7UW
--
Message: 41
Date: Sat, 30 Apr 2011 14:56:31 +0100
From: Geoffrey Downs geoffre...@madasafish.com
Subject: Re: [Elecraft
I too, have purchased a case for my XG3. I purchased a diecast
aluminum Bud Box 6x3.25x1.84 inch to provide shielding for
weak-signal testing using attenuators. Mouser 563-CU-476 $11.60. I
also bought a BNC feedthru adapter and have a mini-phone jack to
provide external programing control.
I ran a Swan Mark-III (2x3-400z) PS on 120vac in a bedroom (My ham
shack) running 2500vdc @ 400mA (1000VA) to run my 2m-8877 to 600w
output. That PS drew at least as much as the KPA500 will. I only
saw a slight momentary flicker in the room lights when I switched to
transmit (I am
The K3 is a great radio, we all agree, and it is finding lots of
enthusiasts for use on VHF/UHF. But for one very popular use, it is
not able to fulfill is as a satellite radio. For successful use on
the ham sats one needs to have full duplex operation. This usually
is in the form of
First off let me state that I do not have any of the equipment Stu is
using. The fact the XV432 likes the 50-ohm termination (dummy load
to the rest of us), says it looks like a termination loading
issue. The Henry 2004 should offer a 50-ohm load at input. Some
amps require input tuning (my
Stu,
OK so you are keying the XV432 Tx control line and not applying RF
drive (not sure how you accomplish this, but not important in this
discussion). It oscillated unless there is a 50-ohm RF load on the output.
I think its time to contact Elecraft for help. I assume you did not
build the
Dennis,
I bought my K3 primarily for use as an IF for VHF/UHF/mw, because...
the same reasons it is so good on HF:
excellent selectivity
low phase-noise LOs
simpler down-conversion (less birdies)
light weight
very good freq. stability
direct transverter interface
designed for high performance CW
So far, I have not used the K3+2m transverter on weak-eme CW, but
when I did quite a bit of eme-CW several years before the advent of
digital-eme I found the use of NR and DSP narrow BW filters (100-200
Hz) necessary to copy CW. This was using my FT-847 which has a more
limited DSP menu than
I think folks should realize something, here. Anytime you begin in a
new enterprise (like learning a new language, studying a new topic,
beginning a new class, ..or learning to operate a new piece of
equipment - aka the K3) you start out totally bewildered by the
subject. Depending on the
Timing is Everything! = Dayton Hamvention.
Hope you have plenty of staff for the Elecraft table at Dayton - I
can see crowds!
My first thought was there was the replacement for the FT-817
(sort-of), then I thought: Flex-1500 has competition!
But I will not be trading in my K3 for one.
If it
I would probably be interested in this since I bought the K3/10
except that I have already bought an EB-27 kit for a 18w/300w PA from CCI.
http://www.communication-concepts.com/appnotes/EB27A300Sharp.pdf
With 12w drive it will likely only reach 200w output, but my K3/10
has 16w output up to
Fred,
I really appreciate your comments. I have yet change my default
settings (other than EQ on Tx), so this is very interesting. I
wonder how you adjusted AGC to noise level threshold? Seems that
would change with band. (reply off reflector)
On HF the K3 noise floor ranges from S6-7 on
Dan,
The K3EXREF controls the TCXO-3 to maintain a near zero offset
compared with an external frequency reference. The K3 synthesizers
are still referenced to the TCXO-3 all the time. So during the
interval between frequency corrections, roughly every four seconds,
the radio frequency is
Why does everyone assume the K3 will be obsoleted by hardware? The
core of the K3 is a SDR which has continued to evolve with firmware
upgrades. I would not count out the possibility of further
improvement in the DSP sw.
In time the basic processor will become obsolete. So maybe a replace
Although I enjoy building (obviously), it was cost that made my
decision to buy the k3/10 vs. K3/100. Then I discovered the CCI amp
and that sealed my decision. I will have a 300w amp for less than
the cost of the KPA-100.
It will not have auto-band changing and other niceties, just a brick
Dan,
Sorry for delay in reply, I get the Elecraft reflector by digest.
I believe it will work with the standard TCXO but there was a note
from Elecraft recommending that the TCXO-3 be installed for use with
the K3EXREF. Perhaps that e-mail can be retrieved from the digest,
Napple, etc.
I
Merv,
Yes, I could use the BAND0-3 lines from the ACC connector on the K3
to control band changing (filters). Not that hard to do if the
relays are rated for the 300w power level.
I think I can sidestep the FCC regs by providing an assembly
service of the established kits from CCI. Or I
Has a price range been determined. Size is similar to a lot VHF
brick amps. Although, I may not get the KX3, I may get the
KXPA-100 for my FT-817. In fact I can see the KXPA-100 being
attractive to FT-817 owners (especially with ATU). I am thinking of
this for mobile HF/6m vs in the home
I have my XG3 packaged in a 6x3x2 inch diecast aluminum enclosure
with a BNC FF bulkhead adapter and short BNC cable for connecting the
XG3. I have not installed a small mini-phone jack for connecting the
XG3 to computer for external control. I will post some photos of the
setup in a few
First off, I can symphasize with Doug, as I face unnecessarily high
shipping all the time to Alaska. I'm not speaking about Elecraft's
shipping policy, specifically, as they seem to be fair. My XG3 cost
me $8.64 to ship via USPS Priority Mail.
But recently I bought a 50v PS on ebay that cost
FYI: I have been using ExpressPCB free software which does create a
gerber file if desired.. ExpressPCB makes small orders of pc
boards. www.expresspcb.com
73, Ed - KL7UW, WD2XSH/45
==
BP40IQ 500 KHz - 10-GHz www.kl7uw.com
EME: 50-1.1kw?, 144-1.4kw,
I also saw the two offending e-mail. I only get the reflector as a
digest and do not receive individual e-mail from the refelctor, if
this helps figuring out what is going on. I only saw this about two
time and none since.
73, Ed - KL7UW, WD2XSH/45
==
I have been using WSPR, primarily on the 600m band (495.9 KHz), as
part of the ARRL 600m Experimental Group (WD2XSH).
http://500kc.com/
The furthest my 4.15w ERP signal was detected was 2893 miles. I also
have tried it a little on 6m.
I have used its brother, JT-65, extensively on 144-eme.
As an alternative, might you consider a small amplifier? TAPR is
offering a 20w HF/6m amplifier called the Pennywhistle.
http://www.tapr.org/kits_pw.html
drives with 1/4w and runs on 12vdc.
$77+SH for non-members of TAPR
73, Ed - KL7UW
--
Message: 20
Date: Mon, 30
See my earlier post about the Pennywhistle amp.
You want custom-made package in Pelican Case? I used to make emcomm
radio packages in my work. This included frequency agile portable
VHF repeaters with battery/solar power, portable command radio
dispatch systems, GPS tracking systems
Yeah, I used to work inside one (rated -199 dBm). It was used for
testing early s-band receivers for NASA's Deep Space Network. It
became my workbench (usually with shielded door open). circa 1971
73, Ed - KL7UW
--
Message: 15
Date: Tue, 31 May 2011 21:56:56
Have to back up what Jim, KL7CC,.said:
Flat-Rate Priority Mail is just that - the same amount to ship to
all 50 states! I use PayPal as it most convenient for selling and
buying (verified funds and almost instantly transferred-no monetary
exchange fees). I can use my credit card with PayPal
Shipping via the US Postal Service is not something that many of us
would choose to do, especially with something as delicate and valuable
as a ham transceiver. That's a big part of why UPS and Fed Ex exist.
--
=OK, but it is generally cheaper outside CONUS to use USPS vs.
UPS/FedEx.
I use TX-INHIBIT on my K3 and have a webpage showing how:
http://www.kl7uw.com/TX-INHIBIT.htm
The circuit does include the FT-847 so is more complicated than you
need. Instead of the voltage regulator you apply 5v thru a 2.2 to
10K resistor directly to pin-7 on the K3 ACC jack. The Station
I can confirm this. I bought an OCXO from them for about the same
cost and is in use for 5-months with only 1-Hz drift compared to my
Rubidium. Short term stability is +/- 5xE-12, and phase noise is
-150 dBc/Hz at 1-KHz.
http://www.kl7uw.com/Rubidium.htm
At 07:59 PM 6/3/2011, Chuck
Interesting ON-TOPIC article from msn.com (what many of us have as
our browser home page):
Under Jobs that deserve a second look is a link to 4 jobs everyone
should work at some point. (
They are:
1. Server (waiter/waitress)
2. Retail Clerk
3. Customer Service
3. Manual Labor
e.g. walk a
Ken,
That is called a Beverage-on-Ground (BOG) antenna (you probably
knew that). Check out ON4UN's Low-Band DXing for interesting
antenna ideas.
In 2009 I ran 930-foot of wire to make a BOG for 600m (500-KHz) but
it didn't work as well as my 43x130 foot inverted-L. After a couple
months my
In 1978 I priced a new 1-ton Ford pickup with large V8 at
$7,600. Today that will tip over $35,000. Ratio = 4.6. Gasoline in
1978 cost $0.75/gal in CA. Today it is running over $4.40. Ratio =
5.8+ In 1978, I made $23,000/year. When I retired I was making
$74,900. Ratio = 3.25
I haven't read W8JI article, but if you are looking to process
diversity data streams from two receivers, you might look at using
Linrad. I am working on a project that uses the diversity function
of the K3 with aux-Rx to process two signals that are opposite
polarity in order to
Having struggled with cable changes to connectors on the back of
radios for years, my solution, when I built my current ham shack, was
to space my radio table out from the wall 2 feet to allow access
behind the equipment. My radio cabinet is now three shelves above
the table top. I bought
I probably should have changed the subject title before sending my
last comment in to the reflector. I was addressing the overall issue
of cable accessibility, not just key paddles and mics. If interested
in what my station looks like go to my website.
http://www.kl7uw.com/techtopics.htm
If I could afford one, I would get it. I am building a kit that will
provide 300w but NOT with all the extra features that come with the
KPA500. I will have to run a 28vdc PS for the 300w linear so not
portable like the KPA500. I bought a used Mirage A-1015G for 6m
(125w driven by K3/10).
Formula for free-space loss (line of sight):
L = 32.4 + 20Log(F) + 20Log(d), where L is in dB, F in MHz, d is in km
To calculate the signal received:
Ps = Po + Gt + Gr - L, where Po = power in dBm, Gt, Gr = gain in dBi
---
Example:
using d = 2.2 km
Bill,
And I hope you realize that comparing 6m propagation to 80m
propagation is not fair! Most likely the XG3 beacon on 50-MHz will
only utilize ground-wave prop. There may be some tropo-scatter
effect but that is usually more enhanced higher into VHF/UHF.
Of course if Es or MUF 50-MHz are
I just downloaded the KE7X K3 Book with the discount price of
$12. Now THAT is a bargain!
I have only taken a quick peek but can see the finished product is
greatly enhanced from the rough draft that Fred sent me to help him
with editing/additions. I regret that I was not able to get thru a
Pretty funny, Wayne.
I have long been one of the unofficial technical advisors on
another reflector and over the years the same questions come up over
and over. Many give opinions how to improve the system by use of FAQ
pages or mini-tutorials, etc., etc. But in the final analysis there
is
Just another old guy rememberance:
Being 14 years-old and a fresh new Novice, I soldered at PL-259 on
the end of the TV twinlead coming in from my 40m folded dipole and
plugged into the DX-35. The hardy old 6146 loaded it just fine with
the pi-net output circuit. A few years later I learned
I've been reading the comments about Bird43 accuracy for awhile, but
the claim that the error is fixed amount for all levels of power
measured on a given element just does not agree with my
experience. (Just about) ALL of my RF power measurements have been
using the Bird and what I see is a
Hey guys buy a 6-foot AC power cord (fits most computers) for $6.99
with FREE shipping from our e-bay store ejce
listing for one cord: 110736486791 ...$6.99 shipping FREE
listing for three cords: 110724550494 ...$11.50 shipping FREE
several other listings of computer cables and microwave items
Although I agree comments from Elecraft engineering would be welcome,
my understanding is the KX3 has no IF.
The KX3 is direct-conversion from RF to baseband audio. Therefore, I
would expect the roofing filter to not be working at RF and be
analog. A direct-conversion receiver is typically
Sebastian,
Glad it worked out. I was suspecting the KEY-OUT transistor when I
suggested testing with no power applied to the K3.
So two things learned - Elecraft Support is superb and you can fix
many things yourself (with a little help).
An as a young technician an old mentor told me that in
Although the KX3 cannot be interfaced with the P3 (no IF to connect
with), it will have baseband to any computer soundcard for running
various SDR sw which often offer panadaptor screens. It should be
compatible with such sw as Spectran, Spectrogram, JTspectra, etc. I
will try it with
John,
Well it get that the P3SVGA is merely an external monitor I/F and not
an external connection to the IQ baseband. Although that had been
discussed as a possible future option (but this isn't that).
The absence of use of the P3 as a SDR enabling operation of SDR sw on
a computer with the
Just a comment on dummy loads:
I do a lot of ham radio work at VHF and higher (up to 10-GHz), so
making good power measurements involves having a good 50-ohm
termination (load). For most of my testing I have several coaxial
loads: A 25w Termaline (Bird) is used a lot in the shack as it tests
http://www.kl7uw.com/600m.htm
scroll down the page half-way for the item marked March 17, 2011.
But mine is a downconverter for xmit. But no reason it could not be
used for receive providing you place a good LF preamp ahead of the
mixer (minicircuits SBL-1). In my case I am using my station
; charset=us-ascii
they work great, dont they
how much L O drive ?
i understand DBM like a lot of drive
my rcv set up was a bit light for LO but have very good signal handling
ability
and I see no overload CDX using it
bob k3djc
On Sun, 25 Dec 2011 17:01:53 -0900 Edward R. Cole kl...@acsalaska.net
writes
Thanks for the special order link. I was not contacted about the
announcement though I signed up some time ago.
My order is in. Now the wait for it to be shipped.
73, Ed - KL7UW, WD2XSH/45
==
BP40IQ 500 KHz - 10-GHz www.kl7uw.com
EME: 50-1.1kw?,
Two things (actually three):
1) I printed the order as it was displayed before final confirmation was sent
2) I received shortly an e-mail from Elecraft listing my order with
the subject line: Elecraft Order Confirmation 2208-4482-7710
3) I rushed over to my credit union (on-line) to transfer
Now that the KX3 ordering frenzy is in full force, my thoughts jump
ahead to integrating the KX3 for 144-148 MHz coverage. Assuming the
KX3 will only cover 28-30 MHz (like the K3) for full xmit output, I
am assuming there will be a 2-freq. LO in the 144-28 MHz module
(transverter). Is there
Ahhh you know it was bound to happen: FT817 vs KX3 and nobody outside
of Elecraft even has a KX3 , yet!
My KX3 purchase totaled $1089.95 before shipping so about $160 more
than I paid for my FT817+CW filter (eleven years ago). Of course the
2m module and the mobile bracket will bump this up
I didn't even hesitate adding the KXFL3 to my KX3 order. I may not
notice much up here in the sticks of Alaska, but the KX3 will
travel with me to the lower-48 and why compromise? The other option
was the MH3, mic.
I opted out of the paddle-key and internal tuner as I do not
anticipate
Since Wayne indicates they're open to the possibility of 70cm,
eventually, and some subsequent comments consider a couple approaches:
Since there is room for both 20w HF tuner and 2m module, perhaps the
70cm module could occupy the space for the tuner to provide 2m/70cm, or
Perhaps a combo
Jim,
Adding VHF+ frequencies to a HF/6m radio has nearly always been some
kind of transverter. Afterall most modern receivers (transceivers)
are based on the superhetrodyne design, which mixes down to a low
enough IF for proper filtering/detection of the signal. A
transceiver is just a
I finished building my 222-28 transverter and decided to test the Rx
using the XG3 on 222.200 MHz. I am not seeing a very strong signal
(had to use the -73 dBm level) so questioning if my transceiver
sensitivity is off.
I understand that the output of the XG3 is calibrated up to 200-MHz
and
I know where Steve is coming from with his reply, though you would
need to step back in time a few decades. In the 1970's I was an
inveterate backpacker, going nearly every weekend into the Sierra's
where you park your car at 9,000 feet altitude and climb from there
often over 12,000 foot
Not specifically for RTTY/PSK, but I use the K3 internal serial
interface (via USB adaptor cable) and line-in/out with an external
soundcard, the emu0202, which connects via USB to the
computer. Especially nice since there are knobs for quick
adjustment of audio levels vs finding the
Wayne,
This is interesting as creation of a ham band on 461-478 KHz will be
submitted to WARC 2012 (resolution 1.23). The ARRL Experimental
Group (WD2XSH) already has been operating in the 495-510 KHz band and
has provisional permission to use 461-478 KHz while under study by WARC.
The K3
Wayne,
First of all I heard you say the KX3 will receive down to 310-KHz but
nothing about transmitting. Can it transmit below 500-KHz like the
K3? As far as sensitivity drop with freq. I assume an external
preamp could compensate for this.
I would be thrilled if the KX3 could do 1mw output
Mike Morrow, KK5F, wrote: It is damnably difficult to radiate *much*
power on 600 meters unless
one has a lot of transmitter and real estate for antenna and ground.
Most hams will be lucky to achieve a few milliwatts ERP from a few hundred
watts input power with small antennas not located over
Phil,
The mic element is not connected to the mic preamplifier until PTT is
engaged (on most radios), so it still implies the mic is the pickup
path. You said there is no hum with the mic removed from the front
panel jack, right? Change mics; is hum still there?
You also said you could
This topic has been pretty thoroughly discussed, so excuse my
additional comments. In summary, I think the majority feel either
the 2.7 or 2.8 KHz filter adequate for general use, since one has
the ability to narrow bw using DSP.
I have only the 2.8 (in both Rx) and 400-Hz filter (in the main
I guess I can see both sides on this issue.
There is a group of about a dozen Swiss hams that formed a club and
set up a 60-foot dish for eme. In Europe having sufficient land and
room for one's own super-antenna farm is just about impossible. But
the site is not commercial; the hams built
Strange situation has occurred while using K3 Memory Editor to load
memory frequencies for the 222-MHz xvtr.
Under CONFIG I turned on XV2 and add 222 and 28 for RF and IF and
0.10 for XV2 PWR and TRN2 but I get 22.xxx in the memory locations
instead of taking the 222.xxx frequencies I entered.
I am starting up a kit making service for assembling certain kits
offered by Downeast Microwave. For those that do not want to make
their own kits, or maybe its gotten too difficult, or just don't have the time.
This a one-man business so I will only be able to build a limited
number per
This is a recurring topic, but TSA is always changing their
procedures so is a reasonable question.
I have flown several times with my old FT-847, 2m amp, cigarette
lighter power cord for mobiling , mag-mt antenna, mic and a few other
accessories. I used to carry them in my soft-side brief
Don,
There are actually a lot of hams that use Elecraft equipment on the
VHF and higher bands with transverters. It is almost a given that
operating microwave ham radio involves hauling equipment up high on a
big hill or mountain. This operation is typically also very
weak-signal operation
Lance and Don,
That is exactly how I have my K3 configured with an external
sequencer. In voice the PTT keys the K3 and I take KEYOUT to key the
sequencer. The final stage of the sequencer defeats the INHIBIT line
to the K3 enabling transmit. I do not run QSK on VHF so I manually
switch
If transmitters are not allowed then arrest everyone carrying a
cellphone or laptop with wifi. Batteries? ditto. Those devices
don't work very well without a battery. Loose battery might have a
question asked. There are sealed batteries that have certification
for air travel, but I suspect
My solution for CW is by using a manual PTT on the sequencer when
using CW mode sent by hand. This always on VHF or higher with
transverters, preamps, ext TR relays and Tx amplifiers
involved. When CW is generated by computer (keyboard) the sw I use
has built-in TR delay in the PTT command.
Recent discussion of use of a filter choke with a battery powered K3
prompts my question in another application. I have a 50vdc 50amp
switching PS which will power a 1100w sspa. Output filtering may be
needed to suppress switching impulses on the 50vdc output. I have a
large filter choke
http://www.arrl.org/news/agenda-item-1-23-passes-committee-moves-to-plenary
On my inverted-L, ERP=1w implies transmitting 25w into the antenna.
Question will be if the KX3 will be able to receive or transmit on
those frequencies. My K3 will go down to 490 at 1mw out in the TEST
mode and is used
Bill,
Yes, good lesson in ohm's law, that too often is overlooked.
So the current draw dropped for 20A to 11.7A. That means you were
heating your lamp cord with 8.3A at 12.7v (= 105w). Not necessarily
bad on a cold winter's night (humour)! But actually a waste of
electrical power and
Kevin, KD5ONS, Nice pic, common sight up here (AK).
Regarding QSB, I would like to relate an extreme case that occurred
last night on 144-eme. My station is a decent sized 2m-eme station
with four 10-element yagis and 1200w, so not surprising to get good
signal reports (-16 is very strong for
This has been asked before and Wayne has indicated that K3 cannot be
extended below 490-KHz. I am using my K3 on the 495-510 KHz
experimental band as a driver for a 100w transmitter (4.15w
ERP). You need the KXV3 transverter I/F and the KBPF3 general
coverage filter for the K3 to operate on
The KX3 has a single BNC antenna connector output for HF. The KX3-2m
transverter is to have a separate sma antenna connector. In both
cases it appears that one will need an interface between the KX3 and
a transverter.
IN the case of a transverter (like the KX3) using a 28-MHz IF, I
suggest
Sort of following this thread as I use a sequencer+inhibit on VHF+
(with transverters and following amplifiers). With my sequencer
delaying K3 RF for about 300ms there is no issue. QSK not used on CW
(of course). My QRO coax relays would not like
But I am finishing my 300w HF amplifier kit
Don and Igor,
I didn't think it out completely when I first posted. This is
because this is the first time I will use a HF amp. VHF amps nearly
all have RF sensed TR (Plus the means for PTT control). I do not
like RF sensing as I can not see how one avoids hot switching.
MY system for
Tony,
Thanks for mention of EME. There are many weak-signal VHF to mw hams
that are discovering the K3 for its superb receiver performance! I
made that move starting in 2010 when I bought my K3/10 (#4043) and
began to accumulate transverters for use on VHF and up. This was
considered the
I changed the subject line to fit my comments, better:
I have not seen the N2QY mods (not seen a link), so do not know what
it does, but it seems one merely needs the IF brought out for the
KRX3 (aux receiver) and that is easy, if you know how to use a soldering iron.
I did this to connect my
First off for those wanting a KPA-1500, might consider combining two
KPA-500 for 1000w (much easier and cheaper). Otherwise, it makes
more sense to design a new 1200w amp around the new LDMOS devices
($250 range). Designs are being done for 6m/2m/432 with the
Freescale LDMOS and some folks
I've had complaints my FM signal is low in audio (which implies low
deviation). Mic gain control is inoperative in FM mode (turned up to
60 with no change). I checked CONFIG: FM DEV and it is set to 5.0
KHz. It can be raised to 6.0 but I haven't changed it as that seems
not the proper way
Hey, all that were wondering about the HF amplifier kit I obtained
over a year ago - I finally built it! It uses two MRF-422 for 300w
output with 20w drive. Well, the K3/10 will not provide that. I do
get 15w output (uncalibrated RF) with my K3/10.
The amp kit is distributed by
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