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
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
> 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 ste
: 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)
> W
> 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 -
Jim Brown 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 located to be essentially
> c
afraid that boresighted antennas will still cause problems at 1500 watts.
QRP looks better and better!!
Dave K1WHS
- Original Message -
From: "Matt Z via Elecraft"
To:
Sent: Thursday, July 02, 2015 4:33 AM
Subject: [Elecraft] K3 FD report in high RF (K3 vs Flex 6xxx)
KL7AA had
t: 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 h
"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 w
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. Th
wo elecrafts could not operate on the same band
> at all. Maybe it was something with the setup.
>
> Date: Wed, 1 Jul 2015 12:43:16 -0400From: Guy Olinger K2AV
> To: N1EU Cc: Elecraft Reflector
> Subject: Re: [Elecraft] K3 FD report in high RF (K3
> vs Flex 6xxx)Message-ID:
all. Maybe it
was something with the setup.
Date: Wed, 1 Jul 2015 12:43:16 -0400From: Guy Olinger K2AV
To: N1EU Cc: Elecraft Reflector
Subject: Re: [Elecraft] K3 FD report in high RF (K3
vs Flex 6xxx)Message-ID:
Content-Type:
text/plain; charset=UTF-8
On Wed, Jul 1, 2015 at 8:34 AM, N1EU
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.
t: 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 after they stop t
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
_
: 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 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
>>
e 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 R
> 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 a
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 eve
On Wed, Jul 1, 2015 at 8:34 AM, N1EU 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 weak due to
tempora
I will do that soon.
Original message
From: N1EU
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 this to see w
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 would
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
ju
Joe
Original message
From: N1EU
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
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 diale
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 Orion
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 spu
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 used
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