Jim Brown j...@audiosystemsgroup.com writes:
Your expectations are unreasonable -- 20 ft is WAY too close, even for
two great rigs on the same band at 500W. We run K3s to KPA500s on the
same band for CQP (Cal QSO Party) county expeditions and use 250 ft
spacing with antennas carefully
it: www.VillaGrandPiton.com
email: b...@wjschmidt.com
-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Joe
Subich, W4TV
Sent: Friday, July 03, 2015 9:21 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 FD report in high RF (K3 vs Flex 6xxx)
What would
What would people expect for power loss between the G5RV and the
beam? Based on other comments, distance, and the beam heading the
wrong way, I'd guess about 50 dB.
50 dB is probably optimistic. The equation for free space path loss
(coupling between antennas) is -40 dB + antenna gain - a
I'm thinking this was a late April fools gotcha.
73,
Gary
KA1J
On Jul 1, 2015, at 9:33 PM, Matt Z via Elecraft elecraft@mailman.qth.net
wrote:
KL7AA had two elecrafts at FD, a KX3 for SSB and a K3 for CW, and
interference was a definitely noticed. Each rig was wired to separate 3
On Fri,7/3/2015 7:03 AM, Greg Troxel wrote:
So, I wonder:
When you used the 250 ft spacing (and in the nulls), what kind of
measured coupling did you see?
We never measured anything. Rather, we followed good engineering
practice, worked to find locations on our site where the antennas
Maybe it was something with the setup.
That's an understatement.
Running kilowatt-level power on the same band to two antennas only 20
feet apart is simply crazy. I don't know what input protection the
KX3's have, but they almost certainly kicked in and being inherently
non-linear they
On Wed,7/1/2015 9:33 PM, Matt Z via Elecraft wrote:
KL7AA had two elecrafts at FD, a KX3 for SSB and a K3 for CW, and interference
was a definitely noticed. Each rig was wired to separate 3 element stepIRs,
about 20 feet apart. One rig used the elecraft 500w amp and one used a 1.5kw
amp.
:46 AM
Subject: Re: [Elecraft] K3 FD report in high RF (K3 vs Flex 6xxx)
Maybe it was something with the setup.
That's an understatement.
Running kilowatt-level power on the same band to two antennas only 20
feet apart is simply crazy. I don't know what input protection the
KX3's have
antennas will still cause problems at 1500 watts.
QRP looks better and better!!
Dave K1WHS
- Original Message -
From: Matt Z via Elecraft elecraft@mailman.qth.net
To: elecraft@mailman.qth.net
Sent: Thursday, July 02, 2015 4:33 AM
Subject: [Elecraft] K3 FD report in high RF (K3 vs Flex 6xxx
On Wed, Jul 1, 2015 at 8:34 AM, N1EU n1eu.ba...@gmail.com wrote:
The Flex ops should have dialed in a little front-end attenuation to
alleviate the ADC overload problem.
Understand the sentiment, but more attenuation is operationally
contra-indicated if the signals you're trying to work are
I will do that soon.
Original message
From: N1EU n1eu.ba...@gmail.com
Date: 2015/07/01 10:54 AM (GMT-06:00)
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 FD report in high RF (K3 vs Flex 6xxx)
joemoffatt wrote
Kinda what I thought. We are going to set up again like
The Flex design is completely exposed to strong in band signals. That
is a well known problem with both their original QSD and current DDC
designs. Simply put, they can't handle ADC overflow. That will always
be a problem for SDRs with wide front ends in high RF environments.
The K3 and
joemoffatt wrote
The K3 and Orion absolutely crushed the Flex's. The Flex's got destroyed
by in band interference from the CW guys, but we never heard them.
I don't think you can necessarily make that conclusion without further
testing. If the K3/Orion transmitters had significantly more
Joe Subich, W4TV-4 wrote
The Flex design . . can't handle ADC overflow.
The K3 and Orion transmitters have much less spurious . . . while
the Flex is one of the dirtiest according to ARRL Labs.
Now you've brought in other data to support the conclusion ;-)
The Flex ops should have dialed
On Wed,7/1/2015 5:17 AM, Joe Subich, W4TV wrote:
The K3 and Orion transmitters have much less spurious (particularly
transmitted phase noise from the K3) than most other transceivers while
the Flex is one of the dirtiest according to ARRL Labs.
Yes, ARRL Labs tests are damning, though you
Original message
From: N1EU n1eu.ba...@gmail.com
Date: 2015/07/01 6:50 AM (GMT-06:00)
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 FD report in high RF (K3 vs Flex 6xxx)
joemoffatt wrote
The K3 and Orion absolutely crushed the Flex's. The Flex's got destroyed
by in band
joemoffatt wrote
Kinda what I thought. We are going to set up again like this to see what
happens.
Please report back with what happens Joe.
Unfortunately, the current implementation of SmartSDR (Flex 6K software)
does not provide an ADC overload indication like PowerSDR does so you would
That said, Flex did issue firmware/software that is said to reduce
keying sidebands. I've been trying to coordinate with a local 6700
owner to test it here.
While it may address the keying sidebands, it does not address the
phase noise issues. Flex will never fix phase noise in the prior
A couple of years ago I asked W1RFI at Visalia how come they would
include a picture of a very sharp keying waveform and a spectrum display
showing loud clicks or phase noise but not interpret it for the less
technical types. He said that if you want that you should write to the
editor of QST
On 7/1/2015 12:06 PM, Jim Brown wrote:
Yes, ARRL Labs tests are damning, though you would never realize it if
you only read the text. When is ARRL going to assign technically
competent authors to these reviews?
Right after they stop taking advertising revenue from the reviewees (is
that
the effort to economize.
73, Fred, AE6QL
-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Ross
Primrose
Sent: Wednesday, July 1, 2015 12:12 PM
To: j...@audiosystemsgroup.com; elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 FD report in high RF (K3
report in high RF (K3 vs Flex 6xxx)
On 7/1/2015 12:06 PM, Jim Brown wrote:
Yes, ARRL Labs tests are damning, though you would never realize it if
you only read the text. When is ARRL going to assign technically
competent authors to these reviews?
Right after they stop taking advertising
@mailman.qth.net
Subject: Re: [Elecraft] K3 FD report in high RF (K3 vs Flex 6xxx)
On 7/1/2015 12:06 PM, Jim Brown wrote:
Yes, ARRL Labs tests are damning, though you would never realize it if
you only read the text. When is ARRL going to assign technically
competent authors to these reviews?
Right
On Wed,7/1/2015 2:13 PM, Fred Townsend wrote:
Years ago I wrote the author of a QST published construction article
pointing out an error. He sent me his original schematic. QST had redrawn
his schematic using multiple ground busses using the pitchfork ground symbol
and thereby combining busses.
On Wed,7/1/2015 1:11 PM, Joe Subich, W4TV wrote:
Flex will never fix phase noise in the prior
generation of hardware (e.g. -123 dBc in the Flex 5000, -120 dBc
in the Flex 3000 per Sherwood).
Nor will Yaesu ever fix the clicks in their FT1000-series radios. :)
73, Jim K9YC
at all. Maybe it
was something with the setup.
Date: Wed, 1 Jul 2015 12:43:16 -0400From: Guy Olinger K2AV
k2av@gmail.comTo: N1EU n1eu.ba...@gmail.comCc: Elecraft Reflector
elecraft@mailman.qth.netSubject: Re: [Elecraft] K3 FD report in high RF (K3
vs Flex 6xxx)Message-ID
in high RF (K3
vs Flex 6xxx)Message-ID:
canckpc1suaytmrtjljn0kbdyzay+-gacjqquwbkgvm0vxsp...@mail.gmail.comContent-Type:
text/plain; charset=UTF-8
On Wed, Jul 1, 2015 at 8:34 AM, N1EU n1eu.ba...@gmail.com wrote:
The Flex ops should have dialed in a little front-end attenuation to
alleviate
Guys,
I just had the very fortunate (for me) experience of operating my K3 in a 4F
category with some good operators. My CW station was
My K3, and the other was an Orion 1. The 2 SSB stations were a Flex 6500 and
a 6300.
Due to space limitations, this is a very high RF environment. We
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