Walter V. Gilles wrote:
Am I correct in my understanding that for diversity reception with the
KRX3, and using all 8 pole roofing filters (same 8 pole BW in same slots
for main and sub boards), that matching of filters is unnecessary due to
the inherent 8 pole filter zero offset?
Bill Maddock-2 wrote:
Later today I will start building my LP-PAN kit - I was wondering
if the K3 Buffer mod that is recommended will void the warranty
on my radio?
Probably not. Wayne is well aware of it and has never said the warranty
would be voided.
Bill Maddock-2 wrote:
K2MK wrote:
I'll throw this out for comment. I don't want to say it is an error since
it
may be per design.
We know that in diversity the sub RX is tuned to the VFO A freq and VFO B
can be set to another frequency. When I press the BSET button, the audio
from the sub receiver
Richard Davis-5 wrote:
...Ah the [UNDO] button. Such a simple elegant idea. Where it is
available I use it without any thinking, and with great relief.
There is an UNDO button of sorts. It's called Restore K3 Configuration
From... in the K3 Utility Configuration Menu. This
to the same band as VFO A - but not the same frequency.
This is a different issue and is normal...until the VFO IND firmware
is released. Some early versions have been used by Field Testers but
Wayne has taken it back to the drawing boards for more work before we
do more testing.
73, Bill W4ZV
Roy Morris-6 wrote:
I would like to back up my CONFIG settings
One more point. The Utility Configuration Save is saving much more than
just your CONFIG settings. It saves EVERYTHING including all calibration
constants. So anytime you do a recalibration, change your XFIL parameters,
Wes Stewart wrote:
Following are links to plots that demonstrate some of the fun I'm
having. The first two are taken using Spectrum Lab to look at the Line
Out audio signal from the K3. The input signal is from a homebrew 28.7
MHz crystal oscillator/buffer with about a -70 dBm output
John Huffman-3 wrote:
My K3 has the 400hz 8-pole filter and the latest firmware. I've noticed
that the difference between running the DSP filter at 100hz and 150hz is
greatly increased volume at 150hz. With the NR on (F2-4) easy listening
at 100hz will bow your ears out at 150hz.
Adam Koczarski wrote:
Virtually every software application has an undo key. Backups are for
major
restores, not for a mistaken edit. When's the last time you used a backup
to
restore a document you mistakenly delete a word from?? Not quite the same
thing.
Adam - ka7ark
If
Roy Morris-6 wrote:
I would like to back up my CONFIG settings without having to go through
each one and writing it down. Does the SAVE K3 CONFIGURATION AS button in
the ELECRAFT K3 UTILITY do this? If so, where is it saved? I thought I
would look before I leap. Thanks. Roy Morris
Robert Naumann wrote:
I now see that when I change frequency on VFOA, VFOB also changes to some
frequency in the same band as VFO A. Band up and band down moves both VFOs
also. This linked VFO behavior strikes me as unusual.
Sound like you've unintentionally LINKed the two VFOs. Hold
ni0c wrote:
My testing was done in CW mode with the pitch in the
low 300's (320 Hz, as I recall). So, when I repeat the tests,
I'll vary the pitch and see what happens, say 300 Hz, 600 hz,
and 800 Hz.
Another person who likes a low pitch! This really affects what you will
hear
Julius Fazekas n2wn wrote:
In my CW opinion, I would say you don't need a filter for FD use. While
popular, it doesn't hold a candle to the harsh conditions during a 160M or
major DX contest, such as CQ WW on 20M.
Unless your antennas or operating environment can present signals
ni0c wrote:
I then used the Elecraft K3 Utility to experiment with
various offset numbers for the 8-pole filter. It only took
a handful of trials before I came up with a setting of
-0.09 that resulted in CWT being centered on noise
and a satisfactory transition with the 5-pole
At this point, I’m ready to purchase 2 general coverage modules plus 2 each
of the following filters: 250KHz, 400KHz, 2.8Khz, 6KHz, 13KHz.
John Lemay wrote:
I think it would be worth remembering that much of the selectivity of the
K3
is carried out by the DSP, and it does it very well.
Jeff Wandling W7BRS-2 wrote:
It doesn't bother me that the March QST sort of implied it was knocking
the K3 off the pillar for the worlds coolest radio. (the SDR review with
SDR-5000 and K3 near the backpages).
I don't see how you concluded that. Gene W3ZZ (who owns a K3) is saying
K2MK wrote:
Also you can't use diversity reception while doing this. You have to
be unlinked.
You can use Split in Diversity, but you must use the REV button to tune the
pileup. It's like using Split with one RX but you're receiving in Diversity
using both RXs. I always LOCK the DX
W0MU Mike Fatchett wrote:
If there is a way to do this already please excuse the request.
Radio without 2nd receiver
When working split it would be nice to display your transmit frequency.
Say
you have 21.295 for VFO A receiving K5D and VFO B at 21.305 for transmit.
While I see the
BigAlT wrote:
You only need to connect a TMP cable to J92 on the KRX3 if you want to
use an auxiliary input for the KRX3 ( either via the BNC connector that
comes with the KRX3 or via the KAT3 antenna terminal that is not being
used for the main RX and TX, you can use only one of these
, Bill W4ZV
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Ron D'Eau Claire wrote:
Bill Wrote:
6. The 12V Sense mod can be done by removing the 4 screws holding the fan
assembly and letting it drop enough to give you access to install the
diode
on the KPA3.
The procedure above is NOT AUTHORIZED by Elecraft and you
shouldn't
Ken Kopp-3 wrote:
My most-used control in working SPLIT is the A/B button. A
quick poke of A/B and a tune of the A VFO to put it on the last
worked station in the pileup and another poke of the A/B button
to put the that frequency in the B VFO. How could this be simpler?
It's
Paul W. Van Dyke wrote:
Looking at the K3
I do Data (PSK31, RTTY) and SSB on DXpeditions
I know the DVR and USB as it will used with HRD
What options would you suggest to put in the rig to start with knowing
other
options can be added later.
And what filters are suggested for
Ron D'Eau Claire wrote:
When opening the K3, sometimes you will find that a screw, particularly
one
of the countersunk case screws, that seems to have gotten tighter on its
own. That is usually because tightening the other screws holding that
panel
shifted it just enough to bind on one
Karsten Beyer wrote:
Hello, this is Karsten, DL1QC,
I´m slightly handicaped in hearing on left ear, so I hear CW with K3
always a litte bit out of the middle. Is there an option or procedure to
adjust the level of the stereo phones left/right separately?
Not sure if you have the
Mike I believe there are two separate parts to your post:
At 50Hz width it was quite clear that many stations call off frequency.
Using RIT, I could see that it was typical for them to be 70Hz or more away
from the DX station but I could not hear them in my 50Hz passband. The real
problem
Ed K1EP wrote:
In order to adjust the AFX properties, you have to go into the
menu. It isn't that easy in the heat of the battle.
You can assign the AFX setting to one of the PF keys. I doubt Wayne is
going to want to start making keys work different ways for different modes.
73,
K2MK wrote:
I thought it was interesting that recovery was noticeably slow on the DX
station's frequency when this was happening. However, under normal
conditions when US stations were calling directly on top of the DX
station,
recovery was fast. Hence the ability to copy the DX
Geoffrey Mackenzie-Kennedy wrote:
Larry N8LP wrote on 24 Februay 2009, at 02:40.
I think the days of receivers with xtal filters are numbered.
So don't put the old horse out to pasture just yet :-)
I recall Icom's President Mr. Inouye saying something similar to Larry's
comment
KE4WY:
Never any desensing in the presence of strong signals observed with my K3.
KA1J:
I noticed no desensing with the K3 in the presence of strong signals.
I agree. 160 is the ultimate test for dynamic range (and desense or BDR)
for any rig. Operating SOSB/160 I never experienced *any*
Jan Erik Holm wrote:
Don Rasmussen wrote:
Anyone care to take a guess as to how long an anomoly like this would
live in any other mass produced HF transceiver?
My guess - the life of the radio.
Maybe the Flex guys would get to it.
With Elecraft, the issue was identified on the
Dick Green WC1M wrote:
Has anyone posted pictures of Rose's cases? Are they soft cases or hard
cases?
Soft. http://tinyurl.com/dn8k4o
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Ken Kopp-3 wrote:
There is one additional form of optional calibration: the K3's
wattmeter. See CONFIG:WMTR in the owner's manual.
This is the method I eventually discovered to make the K3's
wattmeter and the external reference wattmeter agree. The
Gary Smith wrote:
Is this not the same thing as the automated Configure Transmitter
Gain in the Elecraft Utility?
No it's not. It's calibrating the K3's internal power meter to an external
standard. It's not absolutely necessary to do Power Meter calibration but
TXG is necessary.
73,
working well at NY4A.
73, Bill W4ZV
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not
sure how the match for the PAR multi-band unit works but it definitely
performs very well.
http://www.aa5tb.com/efha.html
Dale Par W4OP is extremely responsive and all his products are top quality
(I also have one of his BCST-HPF filters for eliminating BC overload on
160).
73, Bill W4ZV
Bill W4ZV wrote:
Dale Par W4OP is extremely responsive and all his products are top quality
One more comment on the Par End-Fedz before Eric shuts the door on this
thread. There are 225 reviews on eHam for the SWL, mono-band ham and
multi-band ham versions of this antenna
of the latter will pick you up.
73, Bill W4ZV
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(under the bottom front cover) must still be
performed as shown on page 2 of the mod instructions.
I hope this clears up any confusion. Hopefully I got everything right
(please correct me if I didn't Lyle).
73, Bill W4ZV
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activities...it simply doesn't.
If QRPers want a REAL challenge, try working DXCC on 160m with 5 Watts.
73, Bill W4ZV (who loves both)
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Ed Muns, W0YK wrote:
During the NAQP RTTY, at one point I was calling a solid
stream of CQ's at 100 watts output on RTTY and not getting
any replies. I was watching the PA Temp, and it climbed up to
65C and looked like it wanted to keep rising pretty quickly.
I think hi temp shutdown
was even included in my rejection notice:
http://lists.contesting.com/archives//html/Topband/2009-01/msg00310.htm
Is it too much to expect folks to actually read the content of messages sent
to them privately? Is it too much to learn to use archive searches? I
think not.
73, Bill W4ZV
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Jim Brown-10 wrote:
On Sat, 14 Mar 2009 14:14:00 -0700 (PDT), Bill W4ZV wrote:
they're compelled to post to ~1700 subscribers on that list
Did it ever occur to you that at least SOME of those 1700
subscribers to the TOPBAND reflector might also be interested in a
TOPBAND dinner
Ken Widelitz wrote:
Is the difference between the Sub RX being Linked and being in Diversity
merely that you can still change the Sub RX frequency using the VFO B
knob?
If you can tune the Sub RX independently using the VFO B knob while
linked,
what is the purpose of being linked as
Benson-2 wrote:
Is there a mailing list where just important software updates and
notices are posted?
I'm guessing you meant for the K3:
http://www.elecraft.com/K3/k3_software.htm (firmware)
http://www.elecraft.com/K3/k3_app_notes.htm (hardware)
73, Bill
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David Gilbert wrote:
That's a Logic 8 problem.
Correct. N1MM has a configuration box to reverse CW sidebands. If N1MM can
do it, so can Logic 8...if the owner wants to support his customers.
73, Bill
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If you **truly** want to block out ambient noise, there are much better and
less expensive solutions. If I recall correctly the $300 (fair traded) Bose
QC2 units only have ~10 dB of attenuation. Bose doe not spec their sound
reduction because it really isn't so great. I think I found the 10 dB
Bill W4ZV wrote:
If you **truly** want to block out ambient noise, there are much better
and less expensive solutions. If I recall correctly the $300 (fair
traded) Bose QC2 units only have ~10 dB of attenuation. Bose doe not spec
their sound reduction because it really isn't so great
use the SUB RX Audio Gain fader control so both channels are
controlled by the inside AG Gain knob.
I hope this helps and that my little graphic is not too distorted to get the
general idea.
73, Bill W4ZV
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For diversity, a pair of matched 5-pole 500 Hz filters now costs $231 plus
shipping from Elecraft ($200 plus $31 to match).
For Sale: Matched pair of 500 Hz 5-poles shipped via Priority insured. $200
($208 if PayPal). Please reply direct only.
73, Bill W4ZV
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...and money.
It takes awhile to enter all the data accurately but I found it well worthwhile.
73, Bill W4ZV
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I'm ready and have all mods (diodes, AF output, Audio Line) and the I/O
board upgrade, KXV3 and KRX3 ready to go.
This might help but it doesn't include installing a KXV3 and KRX3:
http://mailman.qth.net/pipermail/elecraft/2009-February/105704.html
73, Bill
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KRX3.
73, Bill W4ZV
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After extensive experiments with tx audio settings in pursuit of perfect
audio for my purposes - dxing on 80m - I came to the conclusion that for my
voice with the HC-4, an offset of -0.07 with the 2.8 kHz filter was about
right.
It's not unusual for the 8-pole filters to have small
Continued from: [CQ-Contest] SOME THOUGHTS ON USING THE K3 ON SSB
Reading these messages, I decided I should try adjusting the offset
for my 2.8 8-pole filter from the normal 0. I have been getting good
audio reports, but not excellent.
SNIP
Bill W4ZV wrote:
After extensive experiments
UA9CDC:
4) AF knob has recently fallen apart. I have discussed that with several
other users here in Russia and found that it is pretty common case. It would
be good to have substitute knobs made of some better plastic or aluminum.
Is there a source somewhere in the US?
Google concentric
Since I work mostly CW, and am not too interested in diversity
reception (don't have the antennas either), I was thinking of the following:
Main Rx: 2.8 - 1.8 - 1 - 400 - 200
Sub Rx: 13 - 6 - 2.8 - 2.1 - 1 or 400
I know that's a lot of filters, but other than going broke
Wow, that's over
That is a lot of filters ...
2) Unless you are in very heavy QRM/pile-up situations the
roofing filter does not provide a lot of value added
since the final bandwidth is determined by the DSP. The
1 KHz filters add little benefit vs. the 1.8 KHz or 1.5
KHz filters.
I
The most important thing is where are the skirts halfway down and how much more
do they drop with another 10 Hz, NOT the 3 db or 6 db points. The 8 pole
roofers are part of making those skirts dive more in 10 Hz halfway down.
I set up my filters at the +/- 50 dB points, and eagerly await
See K8ZOA's plot for the 500 Hz 5-pole CW/Data Filter section about half way
down this page:
http://tinyurl.com/dho6j6
While looking at those plots, note that the slope of all the skirts is about
the same once you're inside the roofing filter (i.e. beginning at 5-600 Hz).
This is
For some strange reason Nabble is not attributing quotes correctly on posts
sent to the main list...even though they appear correctly on the Nabble
website. Just to make sure there's no confusion as to who said what...
K2AV wrote:
N6KR wrote ()
The most significant new feature is an editor for the K3's CW memories.
These are the memories that you had to load by manipulating a paddle, you
recall these memories by pressing M1 thorugh M4 on the K3 front panel.
And your timing had to be *absolutely* perfect using a
G'day to the Group
Copied this message by VK4ZSS from the Perseus list...thought it might be of
interest here.
73, Bill W4ZV
http://groups.yahoo.com/group/perseus_SDR/message/5124
Guy has just blogged on Rob Sherwood's updating of his receiver comparison tests
with the Perseus receiver
.
73, Bill W4ZV
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antennas probably wouldn't work right in the first place
due to interaction effects.
73, Bill W4ZV
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K5WK:
Has anyone had experience with both the k9ay loops and DXE 4 square receive
systems?
If you want measurement comparisons, scroll down to the table here:
http://w8ji.com/receiving.htm
K9AY has ~3 dB worse S/N (RDF) than 4SQ RX antennas.
73, Bill W4ZV
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/K3_Schematics_Oct2008.pdf
73, Bill W4ZV
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the IM prosign was via a CW paddle input.
I could be wrong but I don't believe the prosign IM serves any function in
CW mode and is simply ignored (as you stated).
73, Bill W4ZV
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using the Heil AD-1K adapter, but I had forgotten
about the rear panel connection. This was with CONFIG PTT-KEY: OFF-OFF.
73, Bill W4ZV
P.S. I believe Nabble has now fixed their quoted text attribution
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N2TK wrote:
Checked again the NB on CW and SSB on both rigs with 3.11. I do not see
this
problem at all. Is it possible the AGC setup that does this?
Most likely it's due to setting RX EQ to positive settings for some bands:
Roy Morris-6 wrote:
If noise reduction is not recommended with reduced bandwidth in CW, and
unpleasant artifacts occur in SSB; then I find NR to be useless.
You may want to read the following by Lyle KK7P:
http://www.zerobeat.net/mediawiki/index.php/K3_DSP
Mike Harris-9 wrote:
One thing to note is that #1400 doesn't have the
hardware AGC mod installed
Are you sure? The hardware AGC mod was implemented around S/N 280 in
January 2008. The blue (?) dot on the SMD diode faces toward the front
panel.
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external computers to make them play. ;-)
I hope Elecraft will make Lyle's presentation available on their website.
73, Bill W4ZV
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Erik you're correct. The table below shows the FT-1000MP (not D but I bet
very similar) has a nonlinear response in the low range of the meter. Most
rigs (other than the K3 and Flex 5000) have the identical problem.
Here's the FT-1000 meter...8 dB total difference from S5 to S1:
http://www.n6rk.com/FT1000_S_meter.doc
73, Bill
Bill W4ZV wrote:
Erik you're correct. The table below shows the FT-1000MP (not D but I
bet very similar) has a nonlinear response in the low range of the meter.
Most rigs
One of our Field Testers has done this, but I would not be surprised to see
Elecraft eventually offer something similar as a standard product. Below
are the FT's comments (sans callsign) since I doubt he wants a lot of
queries about it.
73, Bill W4ZV
On 2008-12-13, at 13:30 , wrote
Lynn Lamb, W4NL wrote:
Sorry for the delay fellows.. Dayton!! And recovery!!
I'll get back to all those requesting JPGs of the K3 main tuning knob with
covers shortly. Lots of interest.
http://store.tentec.com/accessories/ (scroll down to Model 315)
73, Bill
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g7vjr wrote:
Ambient temperatures were 35C daytime, 25C night and we were right by the
ocean. On returning to England I can see that the salty, humid air has
done some damage to the K3, and caused the black case screws to rust. I am
planning to change these for stainless steel screws and
The most economical and most effective lightning protection is to simply
disconnect *ALL* cables (preferably outside the shack) and disconnect *ALL*
equipment power cords from the wall when lightning is in the vicinity. I
also have a whole house surge suppressor on my power service and use quick
I just received my new ZN-SL single-lever paddle from N3ZN and noticed the
following posted on Tony's website:
http://www.youtube.com/watch?v=M_icJLmsFNUfeature=related
Anyone like to top that with an Iambic paddle? ;-)
73, Bill W4ZV
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description for how to accurately set the
filter gain settings using the internal AFV/dBV meter...hint hint to Ron
AC7AC. ;-)
73, Bill W4ZV
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if you want to add features in the future.
73, Bill W4ZV
P.S. One of the reasons you may not be finding good deals on used K3s is
that the market recognizes its value compared to other rigs.
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Brett Howard wrote:
I think for most normal operations I want to use the KAT3 port for the
Aux antenna jack for my KRX3 but I'd like to have the option of using
the AUX RF port without too much hassle. Does anyone see any reason why
one would have any problems mounting the BNC jack and
Eric Swartz - WA6HHQ, Elecraft wrote:
Unlikely since thy use a high first IF with their narrowest roofing
filter at 3 kHz. signals inside that filter will overload the first
mixer and subsequent stages, well before any later crystal or DSP
Icom may be the master of misleading
Walter V. Gilles wrote:
Is it possible, albeit perhaps not terribly beneficial at first glance, to
put another 0.40 roofer in the next downstream slot from my current 0.40
roofer? Would the F/W even accept that setup? If it would allow that
configuration, would the F/W just select the
Dick Dievendorff wrote:
I'll guess that 5 poles is often enough, 8 poles is almost always plenty
and
the benefit gained by going from 8 to 16 poles wouldn't often be very
important.
Don't forget that the roofing filter is cascaded with the DSP filter, which
is typically equivalent to
Brett Howard wrote:
Right now I've got VFO A on 14.030.00 and VFO B on 7.027.00 and I'd like
to transmit on the VFO B freq. Or I'm trying to setup N1MM so that when
I click on the VFO B log section that it switches on split so that I can
TX in the right band. But I keep getting SPL N/A.
Brett Howard wrote:
Whats to say that you couldn't enter into cross band split and then when
ever you TX the rig quickly presses A/B then TXes then presses A/B again
but simply displays like its TXing w/o moving freqs around and what not.
You'd probably not be able to do QSK that way but
Merv Schweigert wrote:
I am some what confused with the issue. I also had assumed,
that if when I installed the 2nd receiver that split operation was
possible. To say it takes a 2nd transmitters is not true. It has
to be a switching issue in what I call software, firmware by others.
Mitch Mitchell wrote:
Hello,
I have been hearing an annoying noise on 160m that has a pulse rate of
about 1/3 of a second. After observing the behavior when I do certain
things with my K3 and my computer I found that the source of the pulsing
is Ham Radio Deluxe polling the K3 for
Robert 'RC' Conley wrote:
During the assembly of K3 #3212 Front panel on page #29 requires 2ea
2-56 black 1/4 6.4mm pan head screws and #2 split lock washers to
mount the stand-offs under the LCD. These screws were missing from the
Hardware bag.
They're typically not in the hardware
Ron NA9F wrote:
See if you can duplicate this:
80M or 40M
CW mode
QSK
AF GAIN ON HI or LOW
RF gain at about 3 o'clock to full open (clockwise).
AF gain knob at 3 o'clock or above.
Transmit either on air or TX Test mode.
You will hear the thumping sound? Now turn down AF gain unit
on the air I'm still thrilled with this hobby. It's
just amazing that we can communicate across the country with 5 watts to a
piece of wire. What fun!!! And thanks to Elecraft for the K2...the ideal
Field Day QRP rig.
73, Bill W4ZV
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Lee Buller wrote:
The K3 was on 7040 and the Orion was on 3520.
A shorted 1/4 wl stub (~46' of Vf 0.66 coax) on the Orion 80m output would
have given ~30 dB of attenuation on 40m. For best results stubs should be
tuned to exact resonance using an analyzer (most tell you how to do this).
EI2CN wrote:
1. What were you using for receive antennas? I think a number of us
would
be interested. 2. Just how much of an improvement do you find with
diversity
reception? 3. Is it possible to quantize? I have a second receiver on
order
at this very moment and am looking
Bjorn wrote:
Here is a recording of 4X4DK calling using diversity. Every time the
signals tilts over to one side, the signal has dropped out of the
other which proves that two antennas are better than one. Another
thing worth notning is that the static discharges you hear in the
on the low
bands. I would never own any rig without diversity now that I've used it.
73, Bill W4ZV
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virtually anything on 10-80m (but
not 160). The 15W power rating is a nice complement to the QRP K2.
CU tomorrow in the Flight of the Bumblebees...I'll be using my K2 and the
ZM-2 from the top of Morrow Mountain (NC).
73, Bill W4ZV
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Split in an early release but
that problem has since been solved now that Diversity Split is implemented.
What a joy not to touch that dinky RIT knob any longer!
73, Bill W4ZV
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Sent from the Elecraft
.
This is not the place to go into a Beverage tutorial but there is a wealth
of information on W8JI's website and in ON4UN's 4th edition (or you can wait
for his 5th edition which should be out next year).
73, Bill W4ZV
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