That is why I've begged several times for a firmware change to make VOX gain
saved per mode.
I do use VOX on RTTY and SSB and with a lot of fussing with soundcard levels
have it more-or-less set so all modes use about the same VOX gain.
Unfortunately, IMHO anyway, I think VOX gain should be
N7WS
On 1/16/2019 9:37 AM, Ken wrote:
On 1/16/19 12:11 AM, Wes Stewart wrote:
Why don't you cut the dipole in the center, add an insulator and feed it with
coax? Put a CM choke at the feedpoint if you insist and lose the ladderline
and tuner. _Prune the wire length for resonance. _
You do r
Why don't you cut the dipole in the center, add an insulator and feed it with
coax? Put a CM choke at the feedpoint if you insist and lose the ladderline and
tuner. Prune the wire length for resonance.
Wes N7WS
On 1/15/2019 7:15 PM, John Pierce wrote:
I haven't read all the comments on
.
Thanks for all the private replies.
Wee
On 1/14/2019 5:05 PM, Wes Stewart wrote:
I've been having a problem were my posts are either not making it to the
reflector or are not coming back to me as a copy, even though they always
have and that is my preference in settings.
Will someone l
https://www.youtube.com/watch?v=FrVDL_-HOds starting at 41 minutes.
Particularly at 1 hour 3 minutes.
On 1/12/2019 9:51 AM, David Woolley wrote:
Do you have a reference for an algorithm that will do this?
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Elecraft mailing list
You do realize that if the common-mode current on the line is due to asymmetry
between the antenna and the line, then choking at the feed-point reduces the CM
current at that point, but just like your example said, a quarter wave *down*
the line you have a CM peak. If asymmetry isn't an issue
Many thanks to all who replied. My ISP had set spam filtering to "extreme" and
was blocking all of my list servers. All of the messages were still there in
quarantine on my webmail server which I never use. My normal client is
Thunderbird which is clueless in this case.
Supposedly they've
I've been having a problem were my posts are either not making it to the
reflector or are not coming back to me as a copy, even though they always have
and that is my preference in settings.
Will someone let me know if they see this post. One person will be plenty.
Thanks Wes N7WS
Lyle is retired here in Tucson.
Wes N7WS
On 1/14/2019 3:00 AM, Bill W4ZV wrote:
David Gilbert wrote
Yes, I agree that the computation needs to be done in the frequency
domain with an FFT. I have no clue whether or not the K3 and K3s have
enough computational power to do so, but Lyle
Drake rated the TR7 by input power as was common then. 250W. They recommended
a fan kit for high duty cycle RTTY operation.
I owned one for years and it was a wonderful radio. The only issue was
tin-plated pins (sound familiar) on the interface between the main circuity and
the digital
With all due respect, you don't say what acceptable loss is. Of course, you can
match whatever the impedance is, most tuners will match an open circuit because
their internal losses allow it. But it can be a fallacy that, "The line loss is
so low it doesn't matter." Absent voltage
Then there must be less signal too:-)
Wes N7WS
On 1/7/2019 6:48 AM, Bob McGraw K4TAX wrote:
... less noise on receive...
73
Bob, K4TAX
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I have not observed a low power issue in my K3. OTOH, in my experience the K3S
PA has been a huge disappointment. One reason for buying a K3S was a hope that
the TX IMD would be improved with FETs. This would no doubt have been true if
Elecraft designed the radio for 50 VDC.
Wes N7WS
On
You were wrong, but it's a common misconception.
Wes N7WS
On 1/1/2019 9:42 PM, Ken wrote:
Geesh, how much power are people running? I've always thought 50 watts was
excessive for digital modes!
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When a post has "FT8" in the subject line, it's an automatic delete. I only
opened this one because Bob wrote it.
BTW, I too use Thunderbird, but don't use any filters etc. I find that I'm
perfectly capable of deleting unwanted posts by myself. For the life of me I
don't know what all of
Generally speaking, with components of the same Q, an L network will be the
lowest loss solution to any matching problem. The network Q is set only by the
two impedances to be matched. (I did once contrived a situation where matching
the very low R, high C gate impedance of an FET could be done
Me too. My computer and I "worked" it several times.
Wes N7WS
On 12/18/2018 4:50 PM, Dave Cole (NK7Z) wrote:
Sorry to see it go, I got a QSL from it...
73s and thanks,
Dave (NK7Z/NNR0DC)
https://www.nk7z.net
Award Manager, 30MDG Grid Contest
ARRL Technical Specialist
ARRL Volunteer
Mine, a small "Executive" model was a gift from my late wife. Before she passed
we took an Alaskan cruise, round trip out of Seattle. On the flight from Tucson
I put the knife in checked baggage but on the return trip after checking my
luggage I remembered it was in my carry-on camera case.
T. A. Gadwa, “Standing Waves on Transmission Lines”, QST, December 1942, pp.
17-21.
Wes N7WS
On 12/18/2018 3:43 PM, Fred Jensen wrote:
[snip]
The obsession with VSWR in ham radio is a bit surprising. I can't really
remember when the term became common, or when I first saw a VSWR bridge,
.
Regards,
Peter Dougherty, W2IRT
-Original Message-
From: elecraft-bounces at mailman.qth.net [mailto:elecraft-bounces at
mailman.qth.net] On Behalf Of Wes Stewart
Sent: Wednesday, December 12, 2018 4:55 PM
To: elecraft at mailman.qth.net
Subject: Re
If you see low power it's a clue. I operate my K3S + KPA500 as a 500W
transceiver, except when I'm running IMD tests, so the last time it happened I
was notified of bad audio.
The previous times the wattmeter or IMD tests were the clues.
Wes N7WS
On 12/13/2018 12:03 PM, j...@kk9a.com
on 120V! :)
Good luck on those last two, Wes!
John K7FD
On Dec 12, 2018, at 6:17 PM, Wes Stewart wrote:
I run my complete station on a 120V 20A circuit.
Wes N7WS
9-band DXCC, need two for top of the Honor Roll.
On 12/12/2018 5:13 PM, Tom Berry wrote:
Is there any advantage to use 220
Why not?
On 12/12/2018 6:05 PM, Nr4c wrote:
Lower current.
But why on this thread?
Sent from my iPhone
...nr4c. bill
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I run my complete station on a 120V 20A circuit.
Wes N7WS
9-band DXCC, need two for top of the Honor Roll.
On 12/12/2018 5:13 PM, Tom Berry wrote:
Is there any advantage to use 220 V over 110 V on the KPA500?
Is it worth having an electrician come to the house and install a 220 V outlet
If you have another receiver, run a two-test and listen to the K3 output in a
narrow BW. Ideally, the two tones will be considerably stronger than the first
pair of sidebands.
I suspect they won't be, you'll have a lot more than two and you have a blown
FET in the HPA.
Wes N7WS
On
Why not just use CW (or even SSB)?
Disclaimer. I have zero experience with 6M MS. That said, I have confirmed
QSOs with every continental state west of the Mississippi and a few east on 2M
MS (or tropo) :-)
Wes N7WS
On 12/5/2018 12:08 PM, Jim Brown wrote:
While MS QSOs can be made with
Speaking of VOX, how about VOX gain remembered by mode?
Wes N7WS
On 12/3/2018 11:42 PM, Wayne Burdick wrote:
It’s on the Even Shorter list now. Thanks for the reminder.
Wayne
N6KR
elecraft.com
On Nov 24, 2018, at 6:35 PM, Rick Miller - N1RM wrote:
We are operating a K3s remotely
impedance accurately, it should.
73,
Scott K9MA
On 11/27/2018 21:34, Wes Stewart wrote:
I fail to see what that will prove. The only length that will do anything
exciting is the 1/4 wavelength line and even that doesn't affect the SWR.
The other two will just repeat (less loss) on the input
I fail to see what that will prove. The only length that will do anything
exciting is the 1/4 wavelength line and even that doesn't affect the SWR. The
other two will just repeat (less loss) on the input side, what terminates the
load side.
Wes N7WS
On 11/27/2018 3:51 PM, Michael Walker
A few months ago I wrote about the potential errors in measuring SWR with
amateur grade equipment. See my comments in this thread:
http://elecraft.365791.n2.nabble.com/K3-SWR-Numerical-Indication-td7643839.html
I imagine "the best they can do" is accurate.
Wes N7WS
ps. I also said that if I
Well, that got away from me during editing, let me continue
On 11/7/2018 10:23 AM, Wes Stewart wrote:
We're drifting a little but I must concur with my friend Dave's comments.
I've lived over 70 of my 77 years right here in Tucson. As kids we routinely
went shirtless and shoe-less while
We're drifting a little but I must concur with my friend Dave's comments. I've
lived over 70 of my 77 years right here in Tucson. As kids we routinely went
shirtless and shoe-less while outside and often suffered severe sunburns.
After graduating to driving car without A/C, we drove with the
Original message
From: Wes Stewart
Date: 11/3/18 17:32 (GMT-05:00)
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KAT500 as a remote-controlled tuner
Look at the Q on this item. Not good for UV exposure.
Not ready for AZ desert
Look at the Q on this item. Not good for UV exposure.
Not ready for AZ desert.
On 11/3/2018 1:44 PM, w4grj wrote:
Here is a watertight case for $13 w/ free shipping
https://www.amazon.com/MTM-ACR5-72-Crate-Utility-Medium/dp/B00T4XL2MO/ref=sr
_1_7?ie=UTF8=1541277586=8-7=mtm+case+gard
Jack
Some pictures need an aspect adjustment.
On 10/18/2018 5:51 PM, Eric Swartz - WA6HHQ, Elecraft wrote:
We've just turned on the new elecraft.com web page. Please take a look and
enjoy!
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Ed,
Not picking on you personally either but I fail to understand this attitude that
because some digital mode or another can make QSOs with 10 mW on some path,
everyone else should run only10 mW.
I consider my K3S + KPA500 to be a 500W transceiver (with push buttons for
selecting bands)
I use a 14 AWG insulated stranded wire with a spade lug on it for the K3 side.
The other end is bolted to a clamp on the EMT that carries the AC service into
the shack. As far as I'm concerned this is just a safety ground, not something
worthy of an RF ground. All of the other gear is
And if all of this fails look for a blown HPA.
Wes N7WS
On 10/10/2018 8:29 AM, Don Wilhelm wrote:
Gary,
If you just plugged in the MH4 and turned on bias, then I suggest that may be
the cause of the problem.
Assuming you had the K3 set for the low output Heil microphone, you should
change
Yep
On 10/2/2018 1:20 AM, Jim Brown wrote:
On 10/1/2018 10:47 PM, Rick WA6NHC wrote:
While thousands may use VOX
I'm one of those, and I've done it for many years with everything from RTTY to
SSB to FT8, JT65, JT9, and MSK144. It works VERY well. It's one less
connection to worry about,
Good grief. I was discussing RTTY. Two tones separated by 170 Hz. Why make it
so complicated?
On 10/1/2018 10:47 PM, Rick WA6NHC wrote:
While thousands may use VOX, at least thousands use PTT. One reason is that
sound cards are rarely response flat, so the levels will change according to
The following is nothing personal.
I use AFSK on RTTY. That's "Audio" FSK. On SSB, an audio mode, I like
thousands of other folks, use VOX, not some flaky software PTT. Why on Earth
when using a different audio mode should I have to use a different method of T/R
switching, particularly
I had a K3 in service (now a spare) for about 8 years before getting a K3S. I
didn't do WSJT but some RTTY and PSK using the Line In/Out into my Lenovo laptop
internal sound card. Worked like a champ, started with zero and now have 255
countries on RTTY.
I tried to use the K3S USB sound and
Is the intent to use the SDR-IQ as a separate receiver or as a panadapter?
I suspect the former but if it's the later use the K3S i-f output into the
SDR-IQ and setup SpectraVue appropriately. It works wonderfully.
Otherwise follow K4TAX's advice.
Wes N7WS
On 9/19/2018 8:14 AM, NOEL
Hi Frank,
Agreed.
See: https://www.sdr-kits.net/VA5_Page bottom of the page. Indicative prices in
USD $191.77
Wes
On 9/18/2018 1:53 PM, donov...@starpower.net wrote:
Hi Wes,
Thanks for forwarding the information about DG5MK's new FA-VA5
VNA. What is its current selling price?
If you
It's difficult to argue with Frank's experience and expertise. That said, fools
rush in...
I own some network analyzers, 1) an N2PK which I built with type N connectors,
2) a DG8SAQ VNWA-3, supplied with SMA connectors and 3) a RigExpert AA-55 Zoom
with a SO239. Professionally, I've used
Unpowered, the input is connected to Ant 1. Each output has a 1 meg resistor to
ground, other than that just open relay contacts.
Wes N7WS.
On 9/17/2018 7:00 PM, Bob McGraw K4TAX wrote:
I didn't find the answer in the manual, so I'll ask here. I do see in the
manual where bleed
Pretty much my point made in another post.
In fact, I often take a perverse view of these situations and ask myself, "Self,
if you wanted to screw these two things together without the faces touching, how
difficult would it be to do?" And of course the answer is, almost impossible.
Wes
This is one of those, "it depends" situations. Depending on the location of the
two center conductor insulators in the plug and socket, the serrated (toothed)
surface of the female connector might well contact the mating plug surface, if
there is a gap between the insulators. In fact the
This is a support group. This subject was more-or-less initiated by Wayne.
On 9/16/2018 3:43 AM, a45wg wrote:
Please ENOUGH of this !! - Go form a support group or something.
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My first time hearing my echos was pretty thrilling too. So was working W5LFL
in Columbia and having him say, "N7WS, the loudest signal we've heard in the
spacecraft" and then later getting to meet him in person.
Wes N7WS
On 9/14/2018 2:27 PM, Bob McGraw K4TAX wrote:
Mine was the first
I have his card for a 10 meter QSO on 5 March 1972 (my dad's 65th birthday).
Wes N7WS
. On 9/14/2018 2:48 PM, Ted Bryant wrote:
I have one wall of my shack covered with QSL cards from all over the world.
One particular card is from 7Q7AA in Malawi for a QSO in 1971. Many of you
may have
A couple come to mind but one stands out. Without digging out dozens of old
paper logs I'll guess about 1982-83 I was on 2M EME pointed west to my setting
moon looking for JA or UA9. I heard a CQ and copied W5UN. I'd worked Dave many
times, even on 2XSSB so I continued to tune. A few
The WWV antennas are center-fed vertical dipoles.
"The WWV antennas are half-wave vertical antennas that radiate omnidirectional
patterns. There are antennas at the station site for each frequency. Each
antenna is connected to a single transmitter using a rigid coaxial line, and the
site is
I suppose that if you're writing a book that has receiving antenna in its title,
you're going to have to make a case for them even if you have to stretch a bit.
I remember bolting a 115 VAC coil Dowkey relay on the back of my DX100 for
antenna change over in 1960 or so. It was several years
I second that. I have (had) a half dozen of these (one seems to have gone
missing) to use on my K3 and K3S. That said, I seldom use anything but
headphones, unless a visitor is in the shack.
Wes N7WS
On 9/4/2018 3:15 PM, Don Wilhelm wrote:
The K3 can sound really good if one uses external
I've been at this for 60 years now and the only time I've ever heard signals
"pop out of the noise" was when I was working 2-meter meteor scatter. Where
have I gone wrong?
Wes N7WS
On 8/27/2018 8:02 PM, Don Wilhelm wrote:
When you can just barely hear the no-signal band noise, signals will
The 2.8 has better symmetry and no frequency offset. Personally, I have no use
for a 2.1. If you are a CW or RTTY man get a 400 Hz.
Wes N7WS
On 8/26/2018 5:45 AM, Lee Murrah via Elecraft wrote:
I am looking to upgrade my K3S with filters and am using the DX version of the
radio as a
I second (or third) this. Having a K3S now and a modest station mine is idle at
the moment, but at the ready when I need to have serial ports.
Wes N7WS
On 8/23/2018 10:23 AM, Jim Brown wrote:
On 8/23/2018 4:49 AM, hawley, charles j jr wrote:
I really like the 4 channel Edgeport converters.
ule are rules, right?
On 8/17/2018 11:43 AM, Lynn W. Taylor, WB6UUT wrote:
Isn't there a rule about using the minimum power necessary?
On 8/17/2018 11:20 AM, Wes Stewart wrote:
Do they?
I have a KPA500, not a '1500 but I run mi
Do they?
I have a KPA500, not a '1500 but I run mine full tilt on RTTY.
Something to bear in mind in this discussion is that we run our equipment in
ICAS, not CCS. Even in a contest situation we probably only transmit half the
time. During the off (RX) time the amp isn't drawing any plate,
Really? I heard lots of stations on SSB around 1700Z even with my old deaf K3
and a triband beam. Only tried to worked one station in CO but heard TX, ID, CA, WA.
Wes N7WS
On 8/2/2018 4:17 PM, Jim Brown wrote:
All the action is FT8. I've made close to 20 QSOs today -- FL, GA, MS, LA, TX,
In Southern Arizona the honey bees are mostly Africanized (i.e. "killer bees")
They have killed people and animals up to horse sized. I have a little water
feature in the back yard, that unfortunately has goldfish in it. My late wife's
idea, so I don't want to kill them. Hence I get a lot
I would be surprised if two garden variety instruments, even placed at the same
point, would agree. The directional bridges/couplers in most "(V)SWR" meters
that hams routinely use externally or which are built into our radios are not
precision instruments. There are a number of error sources
Now I wish I understood that. Doesn't anyone write in English anymore? I
suppose I should be relieved that every third word isn't "like."
On 7/24/2018 3:08 PM, Josh Fiden wrote:
TL;DR
Sent from my mobile device
On Jul 24, 2018, at 12:58 PM, Wes Stewart wrote:
I wish I could
Good grief. The man said, "here in Germany."
On 7/24/2018 8:14 AM, Paul Baldock wrote:
One point to note is that your SPE1.3K and the SPE1.5K amplifier I owned for a
very brief period are illegal 1300W/10W = 130 = 21dB gain.
FCC 97.317 reads:
(2) Not be capable of amplifying the input RF
I wish I could understand all of this.
On 7/24/2018 6:58 AM, Arthur Nienhouse wrote:
*/I will agree with everything said pasted below but for one thing which is
Fan Noise I'm a rag chewer around 30 wpm QSK the fan will ratchet up to speed
3 after a few minutes of keying so the fan noise is
Page 13
On 7/22/2018 7:59 AM, Martin Sole wrote:
I had a look but couldn't see how you could do that. CW yes but couldn't
figure it out for SSB. Did you read it in the manual?
Martin, HS0ZED
On 22/07/2018 20:29, Wes Stewart wrote:
According to the manual which is easily located online
According to the manual which is easily located online, the transmitter power is
adjustable.
If it wasn't, a 6dB pad would do wonders.
Wes N7WS
On 7/22/2018 6:05 AM, Martin Sole wrote:
I might be way off here but from what I recall these older vacuum tube final
amplifier radios have output
In deference to the OP in the KPA500 clicking thread...
Having once operated EME (on CW) and meteor and tropo scatter, I can say that
terrestrial path loss is not necessarily lower than the EME path. Many years
ago, W7UBI (SK) in Boise, ID and I ran twice-weekly two-meter MS schedules for
You are wrong. It is (can be) a weak-signal mode.
Wes N7WS
On 7/17/2018 7:15 AM, turnbull wrote:
I thought FT8 was a low power mode. Am I wrong? I am not referring to Fox
Hound mode.
73 DOUG EI2CN
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Based upon my experience you will get a lot of disbelief in this forum.
Nevertheless, I have heard similar, but under somewhat different circumstances.
See: http://elecraft.365791.n2.nabble.com/KPA500-clicking-td7596512.html
I can't explain your issue with this explanation unless your system
Oh dear.
On 7/15/2018 2:59 PM, Thorpe, Jeffrey wrote:
I’m going to declare that my call is a vanity call (that I don’t have to pay
extra for) and have kept since I was a tech.
KimchiGuzzling-7-HotDogZombies
Jeff - KG7HDZ
__
My call was K7CVT when I decided to upgrade to Extra Class. Back in those days
we waited six months for the FCC examiner to come to town. I sent my
application to the FCC in DC, who in turn sent it to Long Beach, CA from whence
the examiners came. So the FCC had two chances to check the
I only needed KH1 on 17, 30 and 160. I didn't much care about 17 and 30 but 160
is my newest interest. My station is modest, particularly on Topband, where I
use on both TX and RX, an inverted-l with 55' vertical and the top wire sloping
down to about 45'. At the moment about twenty 55'
for the other JT/FT
protocols.
Neil, KN3ILZ
On 7/3/2018 5:16 PM, Wes Stewart wrote:
In a message to this group back in February I wrote:
Quoting G4WJS: "For FT8 the net effect is that
up to about 5 seconds of a message may be missing yet still
be decoded. The amount missin
PSK31,
RTTY or whatever.
73,
... Joe, W4TV
On 2018-07-04 9:46 AM, Wes Stewart wrote:
Actually, I was in the process of learning about JT65 by doing some listening
tests when FT8 was added to the suite. So I took it up almost immediately
after it was introduced. I think I was up to about 80 &qu
Actually, I was in the process of learning about JT65 by doing some listening
tests when FT8 was added to the suite. So I took it up almost immediately after
it was introduced. I think I was up to about 80 "contacts" when someone on the
WSJT-X Yahoo group suggested that JTAlert was a great
e Subich, W4TV wrote:
On 2018-07-03 5:16 PM, Wes Stewart wrote:
Hence, I dubbed the mode, "Imaginary" since it hears things that
aren't there.
Not true. It takes advantage of large polynomial encoding that allows
the decoder to "get the message" in spite of missing o
In a message to this group back in February I wrote:
Quoting G4WJS: "For FT8 the net effect is that
up to about 5 seconds of a message may be missing yet still
be decoded. The amount missing can be either a truncation or
parts of the message below the decoding threshold. The FT8
Seem like much to do about nothing.
How about "stroke 7" or "slant 7"?
If I didn't need to get more QSLs with the call, I would use N7WS/60 this year,
for my sixtieth year in ham radio.
Here's what the FCC thinks about the subject:
"In addition to the special event call sign system, any
If it's like a KPA500, you can have it go to Operate when powered on. Menu "PWR
ON = OPER"
Caveat, I don't use the K3 to turn on the amp. Separate operation.
Wes N7WS
On 7/2/2018 7:13 AM, Brian F. Wruble wrote:
I have just installed my new KPA1500 with my K3. I have run a line from
the
As a point of clarification. When I was having a totally unrelated issue, I
received a message from an Elecraft support person who stated among other
things, "Our digital mode set up procedures call for the use of software
commands to handle TX/RX switching instead of VOX control."
Since
I suppose that you're addressing this to me, but since you didn't quote any
prior message, who knows.
I realize that Elecraft's position is that VOX is a no-no. However, CAT is a
PITA no-no for me, particularly when Microsoft reassigns comports Willy-Nilly.
There is a reason for using "real"
Do you have the same mode selected for both VFOs? Give the A -> B a double tap
to be sure. Understand that in Hound mode you need to set your TX frequency
above 1000 Hz. If the Fox calls you he will move your TX down to his frequency.
I'm still experiencing a TX delay, which I think is WSJT
From AZ working to the west on 160 is best at our sunrise. Propagation, hence
noise, to the east is gone and we observe an often spectacular peak. I made a
marginal KH1 QSO on 8/27 @ 1134. A few minutes later they were very Q5 and hung
in there for a good 20 minutes past my sunrise.
I was
I have an old K3 that came with the pre-stiffener plate synthesizer. I
discovered the microphonic issue ten years ago and my radio was the first to get
the stiffener plate mod. So, it's old.
I also have a K3S so the old radio is a spare. For some silly reason after all
of these years I
Offhand, since they are adamantly opposed to using operational ALC, I could see
incorporating a "1500 W" gain calibration, as they do with K3s. They could read
the output power at several frequencies per band and save the gain settings.
This assumes they have enough memory in the K3 to save
A with a 60 Ohm load,
1.2:1, results with a relative constant -40 dB reflected gain and a -20
forward gain. A closer match to 50 Ohm fall's apart with a wide -40 db
to -70 dB dip at 7 MHz reflected across the band at 50 Ohm.
I can agree, 1.2 : 1 is about the limit.
John KN5L
On 06/22/2018 01:11 P
SWR than a 1:5:1. This could lead to the dreaded more fan
noise.
By the way by suggesting 1.0:1. I did not mean exactly
1.000:1. I tired to infer 1 digit resolution/accuracy.
- Paul KW7Y
At 11:11 AM 6/22/2018, Wes Stewart wrote:
I do not, and probably never will, have a KP
I do not, and probably never will, have a KPA1500. I do have a KPA500 and
KAT500 so I think I can comment. In my opinion, the function of these tuners is
to provide a match into which the amp can deliver full power. If 1.5:1 does
this, then that's good enough in my book. Furthermore, a
It might be but the amp is designed to work with radios other than K3s.
On 6/22/2018 5:01 AM, ANDY DURBIN wrote:
Why wouldn't it be preferable to use the transceiver's exact TX frequency, if
available,
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Unfortunately, the IMD can be unacceptable even with the supply set to the high
side.
I will confess to not having measured IMD v. supply voltage. For my manual
method, that entails another layer of data. I have however, characterized my
old K3 and my new K3S with three different LPAs and
That make no sense to me.
On 6/21/2018 6:54 AM, Jack Brindle wrote:
To the last question - Yes. The KAT500 and KPA500 do not communicate through
the AUX bus. Further, KAT500 is listen only, KPA500 is talk only, and KAT500
cannot listen to the KPA500 data.
Jack, W6FB
To make these kinds of measurements with amateur equipment and accuracy, I
suggest acquiring some directional couplers and/or high power attenuators. A
spare K3 or a decent SDR receiver then makes an excellent "power meter" with
significant dynamic range. Gain measurements are really ratio
085
CWA Advisor levels II and III
http://cwops.org/
--------
On Thu, 6/14/18, Wes Stewart wrote:
Subject: Re: [Elecraft] Field Day rig experience
To: elecraft@mailman.qth.net
Date: Thursday, June 14, 2018, 4:47 PM
Will,
First of all I have said before and will
ly, and this is the point of having multiple roofing filters
at the first I-F. So, this is the origin of the term roofing filter---in
comparison to the barn-door up conversion first I-F.
73, Will, wj9b
CWops #1085
CWA Advisor levels II and III
http://cwops.org/
------------
Certainly not to disparage the K3(S) architecture (I have two of them) there is
nothing inherently wrong with an up-conversion receiver, if modern hardware is used.
See: https://martein.home.xs4all.nl/pa3ake/hmode/g3sbi_intro.html
and my friend Cornell's, Star-10 transceiver.
Thank you for posting this. I have been saying it for years on these forums and
getting told that I didn't know what I was talking about. Now maybe the
naysayers will take note.
Wes N7WS
On 6/9/2018 6:28 PM, Wayne Burdick wrote:
Finally, both the transceiver and amp will vary from band
I don't have a KPA1500 or enough power attenuators to test my KPA500, but I have
spent many dozens of hours looking at TX IMD on my two K3s.
I will simply say, if you haven't already, check the IMD of the bare K3 before
blaming the KPA1500. Garbage in, garbage out. That of course doesn't
No P3 here but I can tell you that the SSTV people think they own 14.230.
Wes N7WS
On 6/7/2018 6:16 PM, Clay Autery wrote:
Can someone send me a screen cap off a P3 or something of the waveform for FT8
(and any other digital mode).
I'm pretty sure I am seeing people running data WELL beyond
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