of you might be interested to see what two of the
best low band DXers thought about their K3s.
73 HNY,
Bill W4ZV
--
View this message in context:
http://elecraft.365791.n2.nabble.com/ON4UN-has-a-K3-tp582259p5888588.html
Sent from the Elecraft mailing list archive at Nabble.com
absolutely identical receivers that share one common reference system. That
is what I have switched to now.
I thought some of you might be interested to see what two of the
best low band DXers thought about their K3s.
73 HNY,
Bill W4ZV
--
View this message in context:
http
Arie Kleingeld PA3A-2 wrote:
So what if ON4UN has a K3?
Since ON4UN has won 70% First Places and 20% Second Places (EU or World) in
100 international contests over a 20 year period, I place a lot of
credibility in his opinions...not to mention his world high DXCC standing on
80m and EU
VK7JB wrote:
My question: Given my situation, would I benefit from the extra
investment in the KTCX03-1 high stability reference oscillator and/or the
2.8-2.7 filter swap option?
About filters: which would you recommend I buy, given my casual-mode
operation? I anticipate working
Bob Naumann wrote:
I've asked about the 2.1 filter before, but here it is again.
Will the K3 configuration be changed to allow the selection of the 2.1
filter for transmission purposes?
Only Elecraft can answer this question. In early 2008, I tried using a 1
kHz filter for CW TX
P.B. Christensen wrote:
Since keying bandwidth is a function of the RF envelope shape, I'm not
sure
why anyone would want to narrow the K3 filter on CW transmit.
Because most rigs have spurs and I wanted to make my signal as clean as
possible. Typically these may be 80 dBc but still
VK7JB wrote:
# About filters options:
There was a concensus of opinion that the 2.8 8 pole / 2.7 5 pole swap
wouldn't be of benefit in my situation and that I should just go with the
2.7 / 5 pole stock filter.
SNIP
I've decided that I probably WILL do the 2.8 for 2.7 swap and
k2zf50 wrote:
If I am not mistaken, the original post was in reference to 80 meters. I
may be wrong, but I am not aware of long path on that band.
Jim Douglas K2ZF
Long path is an everyday occurrence on 80 during the winter. Listen
tomorrow morning around 11-1200z for XU7ACY coming
Carl Clawson-2 wrote:
One that I notice to be missing is the KSYN3 stiffener mod. The app note
is
stored near the manual but is not linked anywhere that I can find. This is
one that I probably wouldn't bother with, but are there other mods that
somehow never made it to the mod page?
James Balls wrote:
Not really been keeping up on the reflector, just acquired a P3 but cannot
find any way of tracking VFO B
IF OUT uses VFO A so a hardware mod must be added for VFO B in the KRX3 to
have an IF OUT. N2QT has described a mod to do this below:
K5WA wrote:
My 1000' beverages are WAY too close to my 160 phased vertical array
(about
100' max at the closest point) running the legal limit power but I have
zero
RF getting back into the K3 when transmitting and I use NO external relays
to protect the K3.
Same here. I've never
Pete Smith N4ZR wrote:
And I think a lot of the skill should be credited to the ops on the
other end who manage to pull out the QRP stations.
I agree. Most of the credit should go the the station that copies QRP
stations. It's one thing to generate a weak signal but entirely another
correct.
4. Indeed the effectiveness of APF seems to vary with the type of noise. I
find it most useful in mild atmospheric noise (lightning from a long
distance) and less useful in galactic or white noise.
73, Bill W4ZV
wayne burdick wrote:
A couple of notes from the Elecraft lab:
1. When
Arie Kleingeld PA3A-2 wrote:
I have no lab equipment but I have a K3 with dBV measurements, XG2 and
the stepped attenuator from elecraft.
Arie I believe you may have some measurement error. I'm sure you know that
noise can only be measured correctly with a True RMS responding
Scott Ellington wrote:
Page 36 of the K3 owner's manual:
AFV shows the true RMS value of receiver AF output (mVp-p), unaffected by
AF GAIN control.
While that may be true for sinusoidal signals I doubt it holds for noise
measurements. Accurate noise measurements require a true
Barry N1EU wrote:
4.16 APF has the same response curve as all the other versions.
Q.E.D. If it has an identical response curve it has identical S/N
performance. Anything else is either differences in noise conditions or
human imagination.
73, Bill
--
View this message in context:
Don Wilhelm-4 wrote:
I had a sage manager many years ago who often stated Perception is 99%
of reality. Being of a scientific mind, I had my doubts at the time
thinking people will be convinced by the facts of science.
In later years, I have mellowed and now agree with that manager.
PA3A wrote:
Measured the two FW's 4.17 and 4.25 with APF on S+N/N ratio at MDS
again, and again.
Question was: if the filter plots are exactly the same, where does the
measured (marginal) difference of 2 dB come from?
Found no difference this time. Seems that the XG2 drifted a bit in
ab2tc wrote:
The pictures shows just one vertical antenna up on the rocks, not an ideal
arrangement even if they have lots of radials. Is that all they have?
Note the shack photo with about 5 operating positions. DXE, SteppIR and
SpiderBeam are all sponsors so I'm sure they have other
APF was discussed extensively in August 2009 (check the archives) including a
simulation of the exact FT-1000D APF analog circuit which I found and sent
to Al W6LX. Here's Al's simulation which was the model for the K3's DSP
implementation of APF:
NO9E wrote:
APF was different story for RUN. Turning on APF was too slow. Having an
option to switch XFIL and APF for CW only would be great. I guess software
APF toggle change via PF key may be good enough.
I never used APF in the CQ 160 (who has time to tune in 5 Hz steps using
SHIFT or
Does anyone know the cable length of the most recent adapter (using the FTDI
chipset)?
73, Bill
--
View this message in context:
http://elecraft.365791.n2.nabble.com/Elecraft-KUSB-tp6000201p6000201.html
Sent from the Elecraft mailing list archive at Nabble.com.
Bill W4ZV wrote:
Does anyone know the cable length of the most recent adapter (using the
FTDI chipset)?
6' is the answer. Another question...has anyone had problems with the
Elecraft KUSB and XP? I got one report of problems with Win7.
73, Bill
--
View this message in context:
http
wayne burdick wrote:
On the other end of the spectrum: If the going is really tough, you
might consider our 200 Hz, 5-pole filter. It's a favorite of CW and
data-mode operators who routinely have to dig for weak ones between
monster signals in CW and data modes.
I operated most of
I should have mentioned that the 500 Hz Joe measured below was the Elecraft
5-pole...not the Inrad 8-pole.
73, Bill
Joe Subich, W4TV wrote:
200 250 400 500
-
- 6dB 224 370 435 565
Edward R. Cole wrote:
Let me ask a filter question for a different situation. I am
interested in receiving very-weak CW and currently have the 2.8 KHz
and 400-Hz 8-pole filters. Will narrowing the DSP bw down to 200-Hz
work as well as using a 200-Hz filter? There are no strong
Dunc Carter - W5DC wrote:
It has an added benefit in that I can tell if my neighbor's
horrible new plasma TV is on without having to get near the rig. If the
waterfall is all green, there is no point in trying to operate. On 80,
the plasma TV raises my noise floor from - 102 dBm to -
Richard Ferch wrote:
The elecraft mailing list postings can be accessed from at least three
places on the web, each with a slightly different interface:
http://mailman.qth.net/pipermail/elecraft/2010-January/date.html
http://marc.info/?l=elecraft
David Ferrington, M0XDF wrote:
After many months of not much time or opportunity to install lots of
stuff (no mods installed), I want to get all the mods done and install
my KRX3 KDVR3 and the FM filter etc. I believe I have everything
that is required, but will review all the mod
Mike Keller wrote:
Has anyone found a way to use phase cancel external noise heard in the
main Rx using the second Rx and a noise antenna
Not internally, but you don't need the KRX3 to do that. You can use an
external device such as the DXE NCC-1, MFJ-1025/1026 or Timewave ANC-4 (in
John Huffman-3 wrote:
You can see the video at - http://www.youtube.com/watch?v=cefcFcvbmh8
Nice job on your video John! I just wanted to add a comment regarding
spectrum displays. I've used many of these over the years including K6STI's
DSP Blaster, Spectran, Winrad, PowerSDR and CW
Wait for the KPA500...leaked by Eric here:
http://www.mail-archive.com/elecraft@mailman.qth.net/msg86032.html
73, Bill
--
View this message in context:
http://n2.nabble.com/K3-and-HF-amplifier-tp4467006p4468483.html
Sent from the Elecraft mailing list archive at Nabble.com.
For the benefit of others here, the reply by K4SAV on the Topband list is
accurate in all respects.
73, Bill
http://lists.contesting.com/pipermail/topband/2010-January/032608.html
KA1J wrote:
Beverage 1 runs from the house to the east and is 500' long. The wire
comes in through the
Julius Fazekas n2wn wrote:
fortunately, didn't really need diversity this weekend. QSB wasn't a
real issue...
Diversity is not just useful for signals from one direction. I used
diversity continually this weekend to allow simultaneous copy from two
different directions. This could also
in
the presence of wall-to-wall extremely strong signals).
http://www.eskimo.com/~mwdink/3830/CQ160%20CW%20Soapbox%2002-01-2010.txt
73, Bill W4ZV
--
View this message in context:
http://n2.nabble.com/K3-in-CQ-160-CW-Contest-tp4501597p4501597.html
Sent from the Elecraft mailing list archive
you are not simply a troll?
73, Bill W4ZV
--
View this message in context:
http://n2.nabble.com/Attenuator-and-RF-Gain-Settings-tp4503505p4504898.html
Sent from the Elecraft mailing list archive at Nabble.com.
__
Elecraft mailing
to understand what you're doing first by
educating yourself.
73, Bill W4ZV
--
View this message in context:
http://n2.nabble.com/K3-AGC-and-Apparent-Noise-and-Signal-Distortion-tp4504951p4509902.html
Sent from the [K3] mailing list archive at Nabble.com
Bill W4ZV wrote:
The following links are also good learning resources with multiple
links/pages in each:
http://www.elecraft.com/K3/K3FAQ.htm
http://www.elecraft.com/K3/k3_operating_tips.htm
http://n1eu.com/ (click K3 link to the left)
http://www.zerobeat.net/mediawiki/index.php
N4KG used an interesting variation of this idea to feed a **grounded** tower
on 160. He made four elevated 1/4 wave radials, attached the coax center
conductor to the radials and the shield to the tower at the same point (up
from the base several feet). If I recall this was in previous editions
Bill W4ZV wrote:
N4KG used an interesting variation of this idea to feed a **grounded**
tower on 160. He made four elevated 1/4 wave radials, attached the coax
center conductor to the radials and the shield to the tower at the same
point (up from the base several feet). If I recall
Julius Fazekas n2wn wrote:
There were at least a few of us running LP and QRP who did OK with our
K3's
I wasn't trying to list every K3 in the contest...just those used in the Top
Ten of the two most competitive categories (Multi Op High Power and Single
Op High Power).
If you want to
Jim AB3CV wrote:
Tonight may have been the first time I checked 40m operation and I was
surprised to find 40m nearly dead on the sub when the 250hz filter was
engaged. As I raise and lower the RF gain (set to adjust both
simultaneously) I find the sub in the right channel loses all band
High isolation headphones below means ~30 dB isolation from ambient noise.
Heil does not make any in this range and most active noise reduction
headphones (e.g. Bose) only have 10-15 dB. Here are some examples of what
Barry meant:
http://www.extremeheadphones.com/ex-29.html
Tom Boucher wrote:
Can't really imagine why anyone would need noise-cancelling phones for ham
operation
Amplifier blower noise.
73, Bill
--
View this message in context:
http://n2.nabble.com/K3-High-Isolation-Headphones-tp4530272p4530474.html
Sent from the Elecraft mailing list
Guy, K2AV wrote:
In a crowded room our brain neatly interprets stereophonic sound to
separate out a single spatially diverse conversation from dozens of
others at essentially the same level. In research using a monophonic
recording of the multiple conversations from a single microphone in
Randy Moore wrote:
Today I'm helping a friend update his K3 firmware. He doesn't have
high speed internet access and it's been over a year since he has
upgraded. Are there any calibrations that need to be done after such a
significant upgrade? He also hasn't done any of the hardware
Poul Erik Karlshøj (PKA) wrote:
This is only interesting for users of CW on the K3.
You might want to check and see if your K3 - like mine #3674 with 3.68
firmware - produces a badly chirping signal when the VFO is set to a
frequency in a very narrow range of 3525.970 to 3526.030 kHz
Kok Chen wrote:
Spectrograms, such as waterfalls, make use of your eye-brain system to
help find signals that are below the noise level, especially when signals
are drifting and don't allow temporal averaging methods.
SNIP
With the addition of some special filtering, you can make a
Alan Bloom-2 wrote:
You should be able to see signals on the P3 that you can't hear.
(Unless you have VERY good ears!)
Unfortunately the reverse is true for me. Case in point...this morning
5W0YA was very weak on 160m but Q5 copy by ear. Nothing was showing in CW
Skimmer's waterfall
Craig D. Smith wrote:
But I would recommend the 200 Hz 5 pole rather than the 250 Hz 8 pole.
Ditto. W4TV (?) measured the 250 (actually 370 Hz) versus the 200 and the
latter had more rejection at ALL frequencies, even though it's only a
5-pole. I only use my 200 ~1% of the time (500 Hz
WB8ENE wrote:
How does the loss of the 250Hz compare to the 400HZ.
http://www.inrad.net/product.php?productid=150cat=140page=1 (see plot)
http://www.inrad.net/product.php?productid=149cat=140page=1 (no plot)
Typical Insertion Loss 250 Hz: 9 dB; 500 Hz: 7 dB
Both appear to be
WILLIS COOKE-2 wrote:
With 19 months of pretty heavy CW operation, I have not detected a single
time when I thought a steeper skirt on my 5 pole 500 Hz filter would have
helped, but I think you can order one from Inrad if you like.
I used the Elecraft 500 Hz 5-pole filters for ~18 months
Zoli Pitman HA1AG-2 wrote:
If I select SUB-RX Ant source Main instead of AUX, it does not rx anyting.
When I select AUX it works fine from the AUX. According to the manual The
K1 relay should be engaged then sharing the Main ant between the two RXs
(latest manual page 42 fig 2). When I
callen1155 wrote:
I've been thinking about the same question as I ponder ordering a K3. In
regard to the working of DX split, I currently have a K2. Why couldn't I
just use the receiver on the K2 (15 watts) and get the same results
instead of purchasing the K3 second receiver?
You could
Zoli Pitman HA1AG-2 wrote:
CONFIG:KR3A is Ant-BNC, changing works vis BSET-ANT.
Zoli just another point of information for you. It's not necessary to go
into BSET to change the Sub RX antenna. If you HOLD (instead of TAP) RX ANT
on the front panel, the Sub RX antenna will toggle between
callen1155 wrote:
I new the diversity receive was out and I had thought about the RF
overload of the K2. That is a concern and I don't really know if there is
a solution to it. I don't want to 'fry' the K2.
You need something called a Front End Saver.
Yes, sounds like either a bad relay or disconnected cable.
CU on Topband in the contest!
73, Bill W4ZV
On Fri, Feb 19, 2010 at 4:26 PM, Zoli Pitman HA1AG-2 [via Elecraft]
ml-node+4600159-1252395202-39...@n2.nabble.comml-node%2b4600159-1252395202-39...@n2.nabble.com
wrote:
Hello Bill
K9BF wrote:
I am guessing the price tag on the new 5000 will be somewhere near $5000.
I might be able to get my wife to go along at that price. Has anyone have
a better idea of the cost?
Only 1.5 times the cost of a better performing K3/KRX3. The 5000's Sub RX
front end will be very
Interesting comment from the contest reflector by Randy K5ZD. This comes
from someone who often wins the SOHP category in DX contests when he puts in
a full time effort.
73, Bill
http://lists.contesting.com/pipermail/cq-contest/2010-February/089234.html
Put me in the category of people who
On Mon, Mar 1, 2010 at 8:28 AM, Jorge Diez - CX6VM [via Elecraft]
ml-node+4654140-242683743-39...@n2.nabble.com wrote:
So that´s means if I am in 14001.00 running in a contest +9000 miles from
Europe and USA he can land in 14001.15 and start running and of course I
will not interfere him, but
* below indicates K3s in use by USA WRTC teams.
30. K5ZD W2SC *
31. K1ZM K1LZ ?
32. N2NT K3LR ?
33. W4PA K6LA *
34. N4TZ N5AW ?
35. N2IC N6TV *
36. N5DX K5GO *
37. N6MJ KL9A *
38. K7RL K7ZS ?
K1ZM and N5AW both have K3s but I'm not sure what they'll be using. N2NT
has also used one at the
lstavenhagen wrote:
Actually, the K3/10 is far less expensive than its nearest competitors as
far as RX performance from what I can see.
I disagree. Perseus is $1199 in the US and is the current hot ticket for
SWLers. Why? Because it can receive the entire MW band for recording and
Allan Taylor wrote:
During the appx. 20 minutes
I was on 80m, I heard several VERY LOUD
pops.
1. If AGC was used, do you have CONFIG: AGC PLS = nor?
2. If AGC was not used, do you have CONFIG: AF LIM = 18-20?
73, Bill
--
View this message in context:
K2QI wrote:
I'm also wondering if there have been any direct performance comparisons
made between these two radios.
I wouldn't put much stock in *any* performance measurements other than ARRL,
RSGB (Radcom), Sherwood or W2VJN (if George still does them).
The 5000's Main RX should be
Phil Hystad-2 wrote:
When listening to a single CW station I detect a slight tone frequency
change
from the sending station.
I've heard the same. It's a very slight frequency shift (maybe 10 Hz)
during keying that sounds like FM caused by a bad capacitor somewhere. It
doesn't bother
Guy, K2AV wrote:
I've listened for it and I don't hear it. It's not going to be on
everybody's radio.
Not everyone hears subtle pitch differences equally. After listening
carefully it sounds like it may be 1 Hz difference, as in the advanced
stages of this test:
Don Wilhelm-4 wrote:
Now Bill, when did WWV start sending code practice? :-)
That was just a test to see who was awake at 5:55 AM. :-) BTW I thought
the FM effect might be caused by leaving AFX Delay=5 on continuously, but
the effect was the same with AFX Off and with all other AFX
for many
years:
http://lists.contesting.com/archives//html/3830/2010-02/msg00296.html
(story)
http://www.radio-sport.net/cq160cw10_post.htm (story plus a few photos)
http://picasaweb.google.com/KM1CC.CapeCod/Jan312010160MeterContestEnding#
(many photos)
73, Bill W4ZV
--
View this message
Sam Morgan-3 wrote:
so, am I going to need to order this XG2 also,
so I can build the K3 I intend to order later today?
Just the K3 it's self is going to break the bank for me.
Will I have to wait until I am able to afford the XG2,
just to be able to finish the build and put it on the
Gregg W6IZT wrote:
It seems to me that all this points to the lowpass filter in the K3 for
12/10 meters. I can do a physical check for a bad cap or cold solder joint
I would visually inspect the 10/12m BPF very carefully, especially looking
for a bad solder joint on any toroids (i.e.
Radio Amateur N5GE wrote:
What does the word discretized mean?
I always consult The World's Foremost Authority for such questions:
http://www.videosurf.com/video/professor-irwin-corey-at-the-cutting-room-nyc-53354277
:-)
73, Bill
--
View this message in context:
Fred Lauricella wrote:
My K3-2266 with internal ATU, I normally switch between 2 Antennas.
Is there a way to use one for xmit and one for rx. I do not have the
external RX input. Now I just select one to xmit and one to rx when I want
to.
I believe you can do what you want by going
Jack Regan-2 wrote:
If I do not have a sub receiver, Xverter or a P3 is there any reason to
install a KXV3A?
The only thing I could come up with was the possiblty to use seperate
transmit and receive antennas under certain conditions.
That's about it Jack...but one other
Phil Hystad-3 wrote:
I have a 35 foot long fiberglass telescoping pole that I stick in one of
the stake holes of my pickup truck. Then, with the center of my dipole
attached to the top and coax already connected I extend the pole up to its
full 35 foot length which puts the top of the
Eric Swartz -WA6HHQ, Elecraft wrote:
The earlier KXV3 is fine for the P3.(The KXV3a added internal
transverter connections for the K144XV).
No other options are required.
But you probably should do the IF OUT mod if you haven't yet done so:
Bruce Beford-2 wrote:
Man, I love it when there is an opening. Notice how Wayne ruled out very
specific power levels. My money is on the 400-500W class amp in the same
sized box as the K3.
Old news. KPA500 was leaked by Eric on 24 November in this accidental post:
Roy Morris-6 wrote:
When the K3 POWER is set to 100 watts, the actual output will be somewhere
between 93 and 97 watts on the external wattmeter.
That's a net difference of 0.183 dB. Don't confuse resolution with
accuracy. For all practical purposes 93 Watts equals 97 Watts (unless you
this is that Bob is a blind amateur and did
the work himself. He now has one of the biggest signals on Topband from
the east coast here on the west coast.
The next time you think you can't do something...just remember Bob!
73, Bill W4ZV
Bob Garrett wrote:
Toby et al,
Like Gary Lee
lstavenhagen wrote:
In fact, I haven't been able to find an RX that exceeds the overall
performance of the K3 yet period, except the new Yaesu or maybe the 7800
or something like that.
Neither has Rob Sherwood...INCLUDING the IC-7800 (#14 on his list below):
Glenn VK4FZ wrote:
My K3 (S/N 544) is no longer turning off properlythe 12v sense mod is
done, any ideas for further investigation
I'd next try the remote Power Off command (PS0) via the K3 Utility. If that
works and the power switch does not, then you might have a defective
Radio Amateur N5GE wrote:
You say that your side tone pitch is changing, but from your statement
below it sounds to me as though you are talking about the received
signal from the station you are working. If that is true, then the
problem would not be with the K3 side tone, but with the
Rick Prather-2 wrote:
Wow 1Hz change?
You guys violinists for the SF Symphony?
I'm impressed!
It's a gift from God and you could have it too! Click Adaptive Pitch to
the right here:
http://tonometric.com/adaptivepitch/
This adaptive pitch test will play a series of two short tones
W8JI wrote:
caused it. Details are sketchy and/or missing because I
was doing this under
pressure to get up and running in the contest, with a
Yaesu guy yelling in
my ear.
Them darn Yaesu guys really hang in an exclusive group. You
should have asked him if you could join his
juergen piezo wrote:
Just noticed this when playing around with the K3's monitor.
With the Gate off
EQ flat
MH2 hand MIC
TX test mode
Band 7mhz
While whistling there is a odd artifact. If I whistle I get a sound that
sounds like a oscillator pulling in a receiver. I dont get any
WILLIS COOKE-2 wrote:
Looks like a Spammer found the list.
That's a virus in his computer forwarding the spam link to his address book.
I've gotten multiple emails with the same link from 3 different folks within
the past month...all with domains aol.com, even though this one is from
Nick-WA5BDU wrote:
I worked special Armed Forces Day station AAZ today as I transmitted on
14.050 and listened on 13.507. A guy emailed later that my signal
sounded interesting so I monitored it with a separate receiver and
sure enough it was chirping like my old Heath VF-1 VFO.
I'm
timjp wrote:
After a couple of hours in the manual, I give up. How come I have my K3
changing A and B with main A VFO control. I don't remember that
happening.
Also, I notice that I can change the B VFO display with the B VFO knob - !
Bet I tapped a button by accident but can't
Michael M. Raskin wrote:
I have the 2.8 kHz filter in the main receiver and want to supplement that
with either the 2.1 kHz or 1.8 kHz filter. A friend who has the 1.8
thought
is was too narrow. What are you guys using? Anyone have all three?
You friend is wrong. His experience is
Sam Morgan-3 wrote:
the web page says: 1.3.4.26 is the latest ???
but .3 is newer than .26 isn't it?
now I'm confused again
1.3.4.26 = April 26
1.3.4.3 = April 3
73, Bill
--
View this message in context:
Doug Turnbull wrote:
Just back from Deyton and solving problems for the amazing group of high
speed CW ops. Behold for you will not find this attention anywhere else.
This response speaks volumes about Elecraft in general and Wayne in
particular. Most manufacturers would write off any
Allan Duncan-3 wrote:
Perhaps they are considering a
P3 version that could interface to non-Elecraft transceivers with IF
outputs
and RS232 ports? Maybe the KPA500 is similar?
I know the P3 can be used with non-Elecraft rigs and would be surprised if
the KPA500 were not designed with
hf4me wrote:
Do I have to have the Utility up and visible all the time or does it just
install the macro on your selected key and then you use that key?
Either or both. I assign my 2 most frequently used macros (massive split
pileup and return to diversity) to PF1 and PF2, but you can
David Quental wrote:
People nowadays are very complicated and difficult to talk.
:-( At least that's not just a characteristic of USA people! :-)
73, Bill
--
View this message in context:
Stephen Prior wrote:
closer reading of the article reveals
criticism in other areas of the new radio's performance, for example the
frequency disparity between its dual receivers, and the resulting effect
on
diversity reception.
That's very interesting. I predicted this before units
AD4C2009 wrote:
Is that Radcom a trustable source,do they have all the professional
measurement devices Sherwood labs have? If so,what is the difference in
figures to make it better than our K3 ?
For a refined ham it is compulsory to own a k3
Radcom's tests, under Peter Hart G3SJX,
Joe Subich, W4TV-4 wrote:
I don't believe that the K3 is ranked number 1 only based on
footnotes. Consider the 100 KHz blocking numbers, the better
wide spaced dynamic range, much lower MDS (without a preamp),
or better phase noise performance (vs. the Flex-5000) and the
K3 is overall
Alfred Frugoli wrote:
I remember reading a comparison by I think K3NA on the differences between
5
pole and 8 pole filters that eventually lead me to stick with the 5 pole
filters.
Eric and I are both ex-Orion users, which worked well with 4-pole filters so
I concluded 5-poles would be
Phil Hystad-3 wrote:
OK, how do I find out if I need this mod? I have witnessed two different
frequency shift problems, one of them I have posted here and there has
been some discussion about it.
Problem #1 (posted before) -- when listening to CW, when the signal is
reasonably strong
If a KSYN3 was completely unmodified, the mods should be done as follows:
1. SMD version (only) of KSYN3 ALC.
2. K3SYN DDS Gain (your #3 below).
3. KSYN3 Stiffener (your #2 below).
This way there's no rework. Also remember that the DDS Gain mod is not
necessary for the Sub RX KSYN3 (if you
Ed Muns, W0YK wrote:
Keep in mind that Eric (K3NA) typically operates with AGC off, especially
in
the presence of strong signals.
True but AGC Off only applies to the digital (DSP) AGC. Hardware AGC is
always on (to protect the DSP) and therefore is subject to blocking, even if
AGC is
601 - 700 of 980 matches
Mail list logo
