It was suggested I do the Temp Compensation Procedure. Unfortunately
I do not have a stable 50-MHz signal source. However I did run the
Reference Frequency Calibration using my XG3. Call this Part Two:
I sampled the RF output of the XG3 with my counter and also input
that to the KX3 for the
OK, there has been a lot speculation but nobody has one yet to test.
I both run JT65 on eme and WSPR on VHF and 600 meters, so I am fairly
experienced in using these modes. I plan to rigorously test the KX3
+ 2M for specs and test running these modes with real eme signals. I
can run my K3 +
Stewart,
That's a good question. Certainly lower RF output will generate less
heat. One issue that would need to be determined is whether the 2M
module has any operating mode which would result in a full output
spike which would likely destroy 0 dBm input circuit
components. This has been
I was surprised to see the updates, 32 of them, from MS Update since
April 8 had passed. Well, maybe they put it out on April 8. I had
successfully downloaded and saved the professional SP3 files, IE8,
malware updates, etc. and ran then auto update for my computer. I
was surprised to get a
Frequency drift +/- 10-Hz at 144-MHz may be fine for running
digital-mode eme. I typically think of keeping drift 20-Hz as a
requirement. It will depend on how rapid the frequency changes and
how big the steps. JT65 is fairly adaptable to some drift.
When I am in the heat of an eme contest
I just wanted to offer a few general suggestions. Do follow Don's
expert instructions.
A lesson taught me by a fellow bench tech who did not have a lot of
tech training was to initially open the unit and carefully look over
the circuit board for obvious burnt items! Use your nose for burnt
Lance,
Wayne recently commented that they had some re-design after the first
field test round, and were soon to go out with the second field
test. I wrote Wayne directly for more info, but have not heard back,
as yet...I signed-up to be a field tester so am hoping that I may
have one to
Reading all the advice given, it becomes obvious that there is not
one perfect interface. But, I use the simplest one: two shielded
radio shack stereo audio cables to/from the soundcard (mine are
external to the computer) and the original USB/RS-232 adapter cable
from Elecraft. That runs my
So that sounds like it can be used with the 1st IF of the K3. Having
both radios that makes the PX3 even more attractive. Size is really
nice for portable operating with KX3. And feed thru of computer
control of KX3, nice!
Guess we need to add to the piggy bank for one!
73, Ed
On Apr 4,
if one feeds the K3 IF output to an SDR device
(Softrock RX, LP-Pan, SDR-IQ, etc) which does have I/Q outputs, but who
knows at this time.
At this point, it is only speculation on my part.
73,
Don W3FPR
On 4/5/2014 2:56 PM, Edward R Cole wrote:
So that sounds like it can be used with the 1st
Long ago I mentioned using the last radio I would own argument with
my wife to acquire a K3/10. Well, I lied, and subsequently bought
the KX3 (to replace my FT-817). The continuous stream of firmware
upgrades does make this sort-of true, though. I have sn 4043, and
once thought I was the
One comment I would make is having a portable, battery-powered,
sel-contained analyzer is very handy for checking or tuning antennas
outside the shack (like on top of the tower troubleshooting high SWR)
or at Field Day or on your vacation setting up a portable
antenna. It was very useful for
It took some time getting to know my K3 (I'd say about 3-weeks) till
I was fairly comfortable with basic use.
The short-vs-long press buttons did require some re-training on my
part, but I see the utility of not having to find the FUNCtion button
and then a second button to access alternative
An alternative to ladder line is running two parallel runs of coax
(RG-213) with only center conductors connected to the loop and the
radio end center conductors to a balun which solves the unbalanced
issue. The two runs of coax can be taped together.
Two runs of coax will have something
Larry,
Not knowing much about the R390A, but Sherwood ranks it very low in
phase noise. Xtal oscillators are easier to design with low phase
noise than synthesizers. This is primarily why later radios have a
problem with noise as most use synthesized LO's, and why the old
radios with xtal
Gary,
I thought we were done with this thread, so I will only make this
one-more comment.
I discovered this on my own and also had many helpful replies, mostly
pointing this out. My wife successfully did the manual upgrades and
the computer-in-question is running happily.
The computer I
OK, I own this topic :-) Meaning I started it.
My purpose was to discover any facts or truths regarding continued
use of win-XP. If the upgrades are to become NLA, then it will be
harder to keep an older machine running. I think we all know that
windows needs to be re-installed on a clean
Essentially, what we did, so manual upgrade is still possible. But
this experience has me wondering if they will continue to have this
available after support is pulled? I am going to attempt to download
the files to a flashdrive so I will not be relying on MS.com in the
future. I plan to
If you need upgrades to SP3 for win-XP, you may be too late.
I rebuilt an old computer a couple weeks ago as it had gotten
corrupted and the easiest process was to wipe clean the HD and
reinstall windows. I only have a CD with SP2 so have relied on
auto-updating to upgrade to SP3. A couple
I can testify they work. I have moderate RFI on 6m-20m getting into
the old HK computer speakers I used; my wife had RFI in her computer
speakers and still has some in her portable AM/FM radio. WMR
speakers on her computer and for my KX3 eliminated the RFI for
them. I run 125w on 6m and up
There are two sources of frequency drift: the TCXO of the K3 and the
LO of the transverter.
The combined error determines the final frequency stability.
Upgrading to the TCXO-3 improves K3 frequency stability by
ten. Adding the EXREF board improves this.
To improve the transverter LO, it
Charlie,
EME depends on the abilities of both stations. For CW-eme on 2m this
means the sum of antenna gain of both stations should equal 40 dBi,
and the transmit station runs a minimum of 600w output. JT65
effectively increases station performance by roughly 10-dB. That
means two
John,
I am no help regarding the XV-144 use with JT65 (I do not have the XV-144).
But JT65 does not require a linear amplifier. It is FSK and will
work with any amplifier that works with CW, including
Class-C and Class-E. Of course it will work with linear's if that is
what you have. FSK
Luc,
The subject line, above, says K2 but below you ask about a K3. I
can answer if you mean a K3.
I assume the K3 has the KXV3 option for transverter interface. If so
the Tx and Rx are separated. I do not have a XV144 but will assume
it has separate Rx and Tx connections to the KXV3. If
I have not seen or used this brand, but there are several
manufacturers of LMR-400 style cable. I bought some on e-bay a
couple years ago (think it was Comscope brand) and it checked at the
same loss figures as Time's Microwave LMR-400. I am using it in a
non-critical system so consider it a
Not going to try to convince anyone that likes CW that digital is
better. But it offers something different.
I first started with psk-31 back a decade ago, then added JT44, then
JT65 and other of the WSJT suite of digital programs mainly for eme
with QRP transmit power (150w).
I recently
I googled Teller County and see it is into the mountains back of
Colorado Springs so unlikely that you have any chance of a straight
shot for a UHF or mw control link.
Here in Alaska a lot of hams live in remote 'bush country far from
any wireless or wired service. I hear that some are using
Ed:
Here are a few relevant numbers:
XV144: NF = 0.8 dB
SP144VDG: NF=0.55 dB, gain=24 dB, 25w max rating
Coax Loss for 25-feet:
RG-58= 1.25 dB
RG-213= 0.55 dB
LMR400= 0.38
With SP144VDG at antenna:
system NF=0.61 dB using 25 feet of RG-58
system NF=0.60 dB using 25 feet of LMR-400
so it
Ray,
I guess it has changed a lot since the time I flew to Winnipeg from
Minneapolis in 1999. I specifically telephoned the Canadian customs
in Winnipeg to check requirements since I was bringing along a radio
to a conference. That is when I discovered the main issue was
returning to the
One thing you should know about flying on commercial airlines is that
they DO NOT guarantee any electronics that is in checked luggage. I
had a kit stolen out of my luggage several years ago by airline
employees and I only got reimbursement because it was labeled an
enclosure and not
I wonder if any of you have seen this:
Pn = KTB
Pn noise power
K = Botzmann's Contant = 138 E-20
T = temperature in Kelvin (0C = 273K)
B = bandwidth in Hz
convert to dB:
Pn = Log (KTB) = -198.6 + LogT + LogB
If B = 2.7 KHZ, LogB = 44.3 dB
If T = 290K (room temp), LogT = 24.6
then Pn =
I can tell you about living off the grid. 1979-1989 I lived in a
small community two miles from any infrastructure. In fact I lived
in a one-room cabin for most of that time and for three years in a
wall tent. My electricity was a Sear Marine Diehard battery. I kept
it charged either with
Probably overkill on wx station comments.
I bought a Peet Bros Ultimeter 800 at Dayton last year and it blew
apart in 50mph wind gusts a month ago. I wondered why I was seeing
0mph and the trees were laying over at 45-degrees! ;-)
I had been having electronic problems before the storm:
From: Jim Lowman jmlow...@sbcglobal.net
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] The case for a Panadapter - I'm convinced!
---
Jim,
I would suspect having both the P3 and KXV3 subRx would be the
ultimate combo, as you could tune the subRx to whatever mid-frequency
you
I have a friend that loads his G5RV for 6m but his signal is always
about 20-dB weaker than mine. I have a 3-element yagi that I
converted from a Decibel-Products 73-MHz yagi that I scrounged up
from pile of surplus stuff. The elements were 3/8-inch aluminum
tubing so I added some tubing
Glenn,
My guess is most figured you were referring to the KXPA100, but your
question even has more general reach.
Since full output for the KXPA-100 is cited with 10w drive, it is a
good guess that 3w = 30w, 4w= 40w, etc. In reality the gain curve
for amplifiers is not that flat and often
Good points:
JT-65 is 100% duty cycle unlike CW or SSB that are much lower duty
cycle. The issue is dissipation power in your finals. I run JT-65
with 1300w and theoretically the 8877 can dissipate 1500w so I am
fine (the caveat is the 8877 needs very good air cooling). With no
air the
Just a quick comment. I made a purchase using PayPal last night from
a ham friend for a piece of equipment. This is the first time I
have encountered the choice of purchase for friend or family, or
for good and services. I selected goods and services since I was
purchasing something ($30
I'm not asking for help fixing anything but just offering this as
interesting phenomena that I encountered.
A couple weeks ago I was running digital sw using the mode JT-65c
(part of WSJT9.3) on 1296 eme and had two Australian stations reply
on a chat room we use for coordinating that my
Eric,
Thanks for the tip. I tried going with direct freq. enter and ended
up in one of my memory locations above 490-KHz (that I run in TEST
mode). I don't normally change band using the Band switch, since I
have favorite freq. in memory for all bands I use. Just stepping
down in bands
George,
You do not say what power you are transmitting and it would be
helpful to know the separation between the antennas. Will the
vertical be as high as the yagi? Need to know what frequency is used.
OK, in lieu of this data I will make some assumptions and show you
the math to
Ralf,
Thanks for catching my mistake in the ohm's law formula.
P = E^2/R
Regarding using the far-field loss formula it is probably prudent to
try measuring power on the receiving antenna when transmitting on the
other antenna (the yagi). At the very least check with a SWR meter
in the
I think Chris summarizes the issue pretty good.
Gary, it kind sounds like you have not taken the time necessary to
really get familiar with your K3 (excuse me if this is incorrect). I
found it took me about three weeks of playing and reading the manual
until I became fairly comfortable with
Just to expand a big on what Wayne states:
Operation on the upcoming (but not yet established by the FCC) new
600 meter ham band on 472-479 KHz, K3 use is enhanced by this upgrade
in the firmware. It allows operating the K3 on 10.472-10.479 MHz as
the IF input to a transverter which can use
I've already made a suggestion on this topic, but here it is again:
But let me reply in general that a 6m-23cm (50-1296 MHz) all-mode
radio would be desirable in
100w output on the two lower bands and 50w on the rest. NO need for
lead weights once the heat sink is installed. It will be lots
2/3/2014, you wrote:
Eric closed this thread a week ago.
K9ZTV
On 2/3/2014 2:39 PM, Edward R Cole wrote:
I've already made a suggestion on this topic, but here it is again:
snipped
73, Ed - KL7UW
http://www.kl7uw.com
Kits made by KL7UW
Dubus Mag business:
dubus...@gmail.com
Ted,
You really expected a VHF contest to sound like Field day on the HF
bands? That tells me that you do not regularly operate VHF-ssb.
I have been pleading with the FM repeater HT hams for years to
explore the fun of VHF-ssb/cw/digital modes with multi types of
propagation and the
Jim,
I bought my FT-847 in the first few months after it was introduced
in1998 and used it on satellite and eme for ten+ years. I agonized
for two years after getting K3 whether to sell. I needed funds to
buy two transverters so selling the FT-847 provided funds. But I
lost the 440-450 FM
Peter,
EME is all about detecting the weakest signal (e.g. MDS) so I would
attribute this to the low-phase noise of the K3 LO. In fact one of
the determining factors for my to chose it as my eme IF
radio. Dynamic range would be more important in HF where very strong
signals are present at
Not sure how they stack up on the quality scale but I have had good
luck using 1m stereo cables from RS. I've not seen RFI sensitivity
and no failures in continuity. I recently retired some cheap
computer speakers in favor of West Mountain COMspkr's and needed a
speaker cable from my KX3 to
David,
I checked my Power supply and it is marked 9vdc at 800ma. Hard to
know without opening one up whether a voltage regulator is used in
the speaker itself. If your substitute PS is 12v output probably no
harm will result. I find most of these wall cube PS rely on loading
to bring them
I bought the K3/10 without 100w PA or ATU. I bought it mainly for
superior specs on CW, low phase noise, and versatility with
transverters on bands above 6m. I am into eme and mw! The K3 is
better (marginally) at this than the KX3, but physically larger so
not so handy to haul out to remote
Phil and Don,
Lighting is key to seeing detail, small objects. In high light the
pupil constricts and depth of vision improves. These concepts well
known to camera buffs. Want sharp image get higher light levels,
better f-stops, shorter exposure time. I used to have a macro-lens
for a
Spend the time to check off all parts against the parts
list. Ensures all is there and aquaints you with many similar
looking screws (so you don't use the wrong ones). I bought a large
Plano plastic parts box (like a fishing tackle box) with many
dividers to place the sorted parts. Some
I installed beta rev. 1.87 and selected the BCB=160 and observed my
local AM station on 920 KHz go from S8 to S9+5 with PRE on set at 20-dB.
I then tuned down to 495 KHz and am able to see signals at S9 that
were at noise level before! Noise floor is S6 with BCB=160/PRE
ON. With BCB=NOR
I finally ordered and have received my West Mountain COMspkr for use
with my KX3. Work very nice and no RF sensitivity (even with 6-elem
yagi pointed at . I played with the HI CUT control and found a
2-oclock setting pleased me. I have no equalization set on the
KX3. With the control full
I need to correct some of my last statements on this topic (thanks to
Dave AB9CA/4 for pointing them out).
I apparently was thinking of other battery chemistry than lead-acid
batteries. A check with wikipedia reveals that full charge voltage,
open-ckt, is 2.1v per cell (12.6v for auto
Joel,
Having a emu 0202, I wondered what the 0204 differences would
be. Looks to be an upgrade for win7.
You can take the emu stereo output as IQ input to SDR sw. I do that
for JT65B on 2m-eme. I cheat a little by connecting the K3 line-in
to the emu Headphone jack which has a manual
Matt,
The dc wiring is not doing the job. You are seeing 11.2-11.8v
running 60w! The battery under load should hold 13.2v if it is in
good condition and fully charged. That is a voltage drop of
1.6v. You should not see that using awg-8 wire. You mention a relay
in the trunk. What is
This is spin off of the JARD certification thread. Regarding FCC
type acceptance: CFR-47: 97.315
As a general disclaimer FCC regs are written legalese language which
is almost impossible to completely translate to common language and logic.
97.315, b) Any external RF power amplifier or
in the amateur service.
[71 FR 66465, Nov. 15, 2006]
__
Note the differences between the above text and
the text below from a previous message.
- Jim, KL7CC
On 1/7/2014 11:43 PM, Edward R Cole wrote:
This is spin off of the JARD certification
thread. Regarding FCC type acceptance: CFR
I was one of the beta testers on the K3EXREF. I am using a surplus
OCXO bought for about $45 on e-bay. Its output was a distorted
sinewave (appears to have strong second harmonic). I removed the
harmonic by running the 10-MHz thru a DEMI model 10-4 distribution
amp that uses 10-MHz bandpass
Dick,
You did not indicate if the feedback is in the internal K3 speaker or
an external speaker. I have no problem with my K3 using an ext. spkr
(but that is because it is unamplified 1950's era National 8-inch speaker).
I do get audio feedback with my KX3 because I am using cheap computer
I've not had to ship anything worth $4,000 so have not encountered
any packing issues with USPS, UPS, or Fedex.
But I would like to say a word about those Pelican Cases. I first
encountered them in the workplace 15 years ago when we had a portable
VHF repeater built-into one of the smaller
I am using a couple DAIWA manual coax switches. 2-pos selects either
K3/10 or KX3 (at 12w) and 4-pos is for antenna selection at 300w from
the amplifier. I do not use coax switches at QRO levels but I only
run that on 6m and 2m with dedicated antenna so no switching is
needed (I do use coax
I am in general agreement with what Greg writes, below (but with some
comments inserted);
Date: Tue, 31 Dec 2013 12:38:28 -0500
From: Greg Troxel g...@lexort.com
To: Don Wilhelm w3...@embarqmail.com
Cc: elecraft@mailman.qth.net, Craig Schroeder cra...@neb.rr.com
Subject: Re: [Elecraft] KX3 Full
I always get nice comments on my transmit signal using either K3 or
KX3, thanks Elecraft!
The attention to low phase-noise in the LO was one of the primary
reasons I chose the K3 to be the IF for my VHF/UHF/mw
transverters. Since I am in the pursuit of very weak-signals this
it highly
I have preamps on multiple VHF and UHF antennas on the same tower
mast. All preamps are powered off together by a master sequencer so
if I transmit on one band all others are off. The TR relays also are
switched at the same time disconnecting all preamps from their
antennas when any one band
Steve,
Although the KRX3 provides no external connection to the 1st IF, I
have made a modification to do so (very easily). Details are on my website at:
http://www.kl7uw.com/LINRAD.htm
This webpage deals with making an adaptive receiver using the K3 wit
KRX3. Scroll down the page to the
Several years ago I ordered StennHeiser on-ear noise-cancelling
headphones for reducing noise on aircraft. This was not a luxury
purchase but following orders of my audiologist to protect my hearing
always when flying.
Previously, I had to remove hearing aids and insert foam ear-plugs,
Normally I would not post this to the Elecraft Reflector, but since
Dave brings it up, My wife and I are the North American
representatives for Dubus Magazine (i.e. we process subscriptions for
US, Canadian and Mexican hams, providing payment is in US funds. If
you are interested in the
Yes (but read more):
I am using a Down East Microwave sequencer with my K3/10 (mainly on
VHF with transverters but it will work for any band - keep
reading). I use the INHIBIT command in the CONFIG menu to keep the
K3 from transmitting until the sequencer says: OK. The sequencer
goes thru
Dave,
I haven't tried it as a diversity receiver (as such) but have used it
on 6m on a separate antenna while my K3 is on another 6m
antenna. Allow me to receive in a different direction without
rotating the main antenna.
As far as use with good antennas the KX3 runs very close to my K3,
A little off topic:
I wonder if any of you do what I do when using wires are too small
for crimp connectors? I strip twice as much insulation from the end
of the wire and then fold the bare wire over double. May have to
squeeze using small nose pliers to get it doubled tight enough to fit
Not sure how all this commentary on computer time applies to the
topic title. My KX3 keeps perfect time since I did not buy the
battery charger...no clock! My $12 wrist watch has about 1
second/year accuracy.
The K3 clock drifts over a week or so, but is easily corrected using
the Utility
This topic has been pretty thoroughly thrashed, but...
I'd like to add a few comments. I installed and maintained
solar-power communication sites for over 15 years. Open circuit
voltage on a solar panel often will reach as high as 22 vdc (in
direct sun). A panel loaded by a radio will drop
It is interesting to see the concepts that many have taken to
supporting a KX3 (in the shack).
Early on I made quick and dirty solution to installing my KX3 in
the shack. I do not have the optional paddle, either, so I utilized
the pre-tapped holes on that surface of the KX3 enclosure to
For desktop PC I have bought DELL for a decade using win200pro, XP
and been very satisfied. I currently run a five year old duo-core
2.33 GHz, 3Mb memory, XP32 SP3 as my main computer for digital
modes. If support is eventually dropped for XP that will only affect
safe connection to
I was plagued by the K3 not transmitting in DATA-A mode on 1296 with
a transverter. I had the KXV3 programmed for 1296 transverter with
XV5 which should send a HI output on BAND0 when TRN5 is
programmed. I first noticed I could transmit if I had 144 selected
(XV1) which uses the same IF of
This was discussed few couple months ago and it prompted me to make
measurements on 6m 10m, for both K3 and KX3:
Note the measurements were made at 2.8 KHz bandwidth whereas Elecraft
specs are for 500-Hz bandwidth (correction factor is 7.5 dB lower for 500-Hz):
I use an ARR preamp but specs
So far I've counted 96 posts on soldering connectors onto coax. Really?
Dr. William J. Schmidt - K9HZ / J68HZ/ 8P6HK/ ZF2HZ
---
Yep! What I have found is the three most asked technical questions
by (beginning) hams are:
1) How do I program my HT?
2) How do you make
Soldering PL-259 connectors:
First use a good connector like Amphenol 83-ISP. Plating on cheap
connectors the biggest obstacle to getting a good solder
connection. I swear every time I have to use a RS PL-259 and vow never again.
Preparation of RG-8 is different from RG-58 which uses a
I have one of the MFJ Antenna Analyzers which can be used to test
existing coax lines. SWR can certainly be tested, but its not
intuitive how to measure line loss on cables connected to antennas.
The standard method is with open coax runs (no load of any kind which
ensures total reflection
If you think water proofing a PL 259 is hard at average ham heights
of 30 to 80 feet try waterproofing a N connector on the end of 7/8
helix at 300 ft plus feet in the air.
Good Luck all
Bill,W0WFH?
--
Bill,
Yep! Been there. When possible, I pre-installed my top-end
In my professional work before I retired in 2009, I used N-connectors
as much as possible. Some commercial VHF marine radios and the CB
radios (required on our boats) had UHF connectors so I bought
Amphenol PL-259's for them. I bought antennas that had N connectors.
Sealing on boats I used
I ran Norton Antivirus several years ago on win2000pro but switched
to AVG on all but two of my computers. I have an old win95 laptop
that never goes on-line and another backup computer which I run ESET antivirus.
MalewareBytes is the only software that catches all the bad stuff. I
run a
Wayne/Eric:
I'm not trying to reply for David, but we have similar objectives for our KX3.
Using 50-54 MHz as IF for the 2M module is genius in my
thinking. 28-30 MHz too often used as IF for higher bands limits use
to few frequencies. Having the full 2m band is very nice for
multiple uses
I have been reluctant to check in the net with such poor propagation,
but yesterday was super good hearing Phil S9+. I checked in with the
K3+300w pa at first and then decided to try the KX3 barefoot and
John, N6JW heard me with little effort it appeared.
I just had a report of a M1-class
For those of us using low noise preamps, they typically lower dynamic
range, anyway. I recommend a preamp for working non-FM modes as one
is not benefiting from repeaters in high places. The same goes for
using the 2m module as IF for higher frequency transverters (i.e microwaves).
I will
Another thing that states this is current ratings on switches (ever
look at the specs?).
Typical toggle switch may be rated 20A at 125vac and 10A at
250vac. Why? If the load resistance is the same then twice the
voltage will double the current. Heat dissipation of the switch is
the same
David,
Great that you have the KX3 enroute! Dealing with authorities and
beauracy's always vexing, it seems. I recently experienced this with
a company when ordering a replacement actuator for my dish. It cost
$388 and $199 shipping. US Postal Priority Mail was only $80, but
they had to
I had to calculate my radiation resistance to comply with the license
requirements on 600m.
My antenna is a base loaded inverted-L: 43-feet high and 122-feet
long*. Radiation resistance was taken from a EZ-NEC model as 0.83
ohms. Ground resistance was measured with an antenna analyzer as 18
John,
Thankyou for the correction in the formula. In fact the 18-ohms
measured by the antenna analyzer is the total resistance and includes
both radiation resistance and ground resistance, so my numbers are
correct, just not my explanation of them.
This was done three years ago and I
Vic,
Too bad you cannot consider a yagi for 20-10m. That would sit on a
mast secured to the small roof-top building. So a 30x 10 foot
space? I wonder if the 20x10 foot building extends beyond the 30x20 area?
It it extends so total length is 50-feet You could put up a doublet
across the
This moving to OT but interesting to a long-term JT65 user like me.
JT65 was designed for weak-signal communication, so the situations on
HF where strong signals are received might be a problem. I would
like to hear what Joe Taylor (K1JT) would say regarding this. I have
not used JT9 or
I don't have a P3, so my curiosity is only academic.
The sampling function being referred to, would bring a low power
sample of transmit power to the P3? This does not seem very
difficult to roll your own sampler. I gather the P3 has the needed
RF ckts to receive RF and demod it, or is
Very interesting story! I recall Rick's R2 (I think it was called)
which was an analog precursor to the SDR of today.
I think the lesson is well put. To improve your abilities you have
to train! That has to be done at or beyond the limits.
So to hear better train yourself with weak signals.
N7SP etal:
If I may make a suggestion that might make KX3 checkin easier. On
other nets that I often check into, the first stations invited to
checkin are portable, mobile, and low power stations. That gives
those stations a better chance of avoiding being covered up by
stronger stations.
Correct.
Refer to the K3 manual, page 56, KXV3: If KXV3 is set to TEST, the
K3 will use low power (0.1 to1.50 mw) on all bands, including hte HF
and transverter bands. RF input/output is via teh XVTR IN/OUT jacks
in this case. To access the TEST setting, KXV3 must first be set to
NOR,
Probably unknown or forgotten was the NASA project to beam solar
power from orbit to earth! Yes, that was a real project (because I
worked on it). This was about 1972. Experiments were made using the
experimental station (DSS-13) at Goldstone Tracking Facility in the
Mojave Desert. I am
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