Bonjour,
9h ou 21h (plus logique sur 80m en hiver) ? ... de mon côté je vais encore
à la mine la journée ... .
Amitiés
Jean-marc F1HDI flex3000
f4ddn écrit :
Amis Flexeurs, bonsoir!
Voilà nous sommes 4 c'est un début !
Participants :
F4DDN Erick dans le 80
F1BCS Jacques dans le 94
I have as promised created a second video showing the use of the MFJ 1025 Noise
Canceller and the Flex 3000 radio.
This is part one of a multi part series which I will record showing various
things about my setup - the next part will show adjusting the phasing controls
to attain a good null.
[Background] Well I've found a used F3K to purchase and it's on the way.
While I'm waiting I thought I would do some reading.
I came across sever inquires about RFI/EMI interference.
Seems like most are using the clip on type ferrite beads.
So looking at one of my current USB connectors I see
Excellent Demo. You might comment what you are using for your primary and
secondary antennas. I found on using the MFJ1026 that the built in antenna
did not pick up enough of the noise to cancel out. Going with an external
antenna did the trick.
73's, Jerry WB0UZW.
-Original Message-
Nice demothanks.
My question... can't this be done in SW internal to the flex and
PowerSDR? Hint Hint Eric...et al.
Pete WA2ODO
Anthony M wrote:
I have as promised created a second video showing the use of the MFJ 1025 Noise
Canceller and the Flex 3000 radio.
This is part one of a
One of the experimental versions of PowerSDR has this capability. The software
is still under development and requires the proper hardware (two discrete
receivers that are frequency, phase and gain locked), so it is limited to the
FLEX-5000 with an RX2.
Check out Lee's blog on Diversity RX
Hi Anthony,
That's impressive.
How does the effectiveness of the MFJ external until compare with the
PowerSDRs two noise blankers?
Best regards,
Michael Jones W0STB
SCSI Toolbox LLC
www.scsitoolbox.com
303-972-2072
___
FlexRadio
I really think we should be comparing apples to apples. I would
suggest that everyone who is impressed by the MFJ product go to their
website, read the description of what this is and then read the eHam
comments.
73
Lee K9WRU
Quoting Michael Jones mi...@scsitoolbox.com:
Hi Anthony,
I did not say it was impossible, I merely asked to show the miracle device
rather than just the Flex. Assuming this does as you say why is the electronics
not included in Flex and other rigs?
Burt
--- On Mon, 10/19/09, Anthony Martin anth...@consultexcel.com.au wrote:
That is exactly what
I don't know what you mean apples-to-apples?
I'd just like to see hear how the Flex/PSDR combination deals with the noise
compared to the MFJ unit by itself.
Does the hardware unit do a better job of eliminating the noise or doesn't it?
Best regards,
Michael Jones W0STB
SCSI Toolbox LLC
Architecturally, PowerSDR and the FLEX-5000+RX2 should. For diversity RX
techniques to work most efficiently, the two receivers should be frequency,
phase and gain coherent in order to achieve the proper gain and phase offset
values to null or enhance the signal of interest, whether that be
On Mon, Oct 19, 2009 at 10:14 AM, Michael Jones mi...@scsitoolbox.com wrote:
I don't know what you mean apples-to-apples?
I'd just like to see hear how the Flex/PSDR combination deals with the
noise compared to the MFJ unit by itself.
Does the hardware unit do a better job of eliminating
I have to disagree, or maybe we aren't comparing the same things.
They are both noise blankers.
They both have one function - to minimize or eliminate noise.
I don't care if one is free and one is $1,000,000 - they are both noise
blankers so how do they compare in their function of blanking
On Mon, Oct 19, 2009 at 10:51 AM, Michael Jones mi...@scsitoolbox.com wrote:
I have to disagree, or maybe we aren't comparing the same things.
They are both noise blankers.
No, actually they aren't. The NB function in PowerSDR is a noise
blanker. The MFJ box is a noise canceler.
They both
OK - I have been looking at the two things as both being something that can
eliminate noise.
I guess that is too simple of an outlook. I'm not a noise scientist and so I
didn't know that sometimes some kinds of noise need blanking and other kinds
need cancelling. And I have no idea how to tell
At 12:08 10/19/2009, Michael Jones wrote:
there is not an answer to the question of how the MFJ unit compares
to the PSDR NB button.
What everyone has been trying to tell you is that which facility
works better DEPENDS on what
problem you have (which you have not specified). Imagine that
I just came across this contribution from Joel, W5ZN, in the top band
contesting list, and was surprised to read the second paragraph (Also,
be aware ...).
As a prospective Flex 3000 purchaser, should I be concerned?
--- Forwarded message follows ---
Subject:Topband: noise floor
Let me give this a shot..not a noise scientist either.
Noise blankers work on narrow impulse type noise
and noise cancelling works on broadband noise,
think the crap from your neighbors plasma tv. An
oversimplification and there is a bit of overlap in the
kinds of noise each will handle but
For someone who was only trying to help others, Lee is taking a great deal
of flack. This has gotten rediculous. You can see and hear the comparison
on the video clip. They are both noise blankers but the MFJ is far more
effective because of the method it uses. A Chevy and a Rolls are both
At 12:38 10/19/2009, Ian Wade G3NRW wrote:
If you are calling a station up 2 KHz or so
and are running an amplifier you will most definitely put out a signal,
thanks to the spur, that people can hear. Flex is very aware of this but
they have NOT, repeat NOT fixed this.
Doesn't type acceptance
The primary antenna is a 40M Loop that is up about 10-15 meters on one side
and 4 meters on the other side.
The noise antenna is a 40M dipole that runs parallel down one side of the
loop.
A word of warning however - If you're going to put your receive and tx
antenna so close to each other you
I cannot get the noise blankers to do anything remotely like the MFJ can
do.. Which is a shame..
-Original Message-
From: flexradio-boun...@flex-radio.biz
[mailto:flexradio-boun...@flex-radio.biz] On Behalf Of Michael Jones
Sent: Tuesday, October 20, 2009 3:40 AM
To:
LOL..
-Original Message-
From: Burt [mailto:k1...@yahoo.com]
Sent: Tuesday, October 20, 2009 2:54 AM
To: Anthony Martin
Cc: flexradio@flex-radio.biz
Subject: Re: [Flexradio] Noise Cancelers and flex 3000
I did not say it was impossible, I merely asked to show the miracle device
rather
Well, it depends. If the spur is just 2.4 kHz from the carrier, and
depending on its energy level relative to the unmodulated carrier
level, and whether or not it is a discrete tone, or gets modulated as
the main signal does, e.g., SSB mode, it might possibly slip through
regulatory cracks
My nb and nr don't really do much, although I have not adjusted them much.
I cant say I ever heard a dsp noise remover work very well without
distorting the signal a lot.
The mfj noise canceller, and others of its ilk CAN work fantastic on some
noises, but need a lot of adjusting and a good
Except, that most radios made after WW II can hear signals
much weaker than that. 60dB down from 1 KW is 1 mW. QRP guys
can work wonders at that level !!
And considering the last couple expeditions, that's about the
signal level we are hearing at this point in the SS Cycle !!
73, Dick, W1KSZ
I have the MFJ-1026. I don't use the useless whip antenna but this model
does have the built in amplifier. The gain of this amp can be set by
internal jumpers and it can be used to amplify the signal from the external
sense antenna. The amplifier can be switched in and out on the front panel.
I don't have the MFJ model, I have the earlier ANC-4 model made by JPS.
Yes, they require a good noise antenna, and yes, they can be tricky to get
tuned properly, but my little ANC-4 would knock my local power line noise down
far enough that it made operating possible at my apartment.
Now that
At 06:18 PM 10/19/2009, Jim Jerzycke wrote:
I don't have the MFJ model, I have the earlier ANC-4 model made by JPS.
Yes, they require a good noise antenna, and yes, they can be tricky
to get tuned properly, but my little ANC-4 would knock my local
power line noise down far enough that it made
On Mon, Oct 19, 2009 at 2:33 PM, Anthony Martin
anth...@consultexcel.com.au wrote:
I cannot get the noise blankers to do anything remotely like the MFJ can
do.. Which is a shame..
sigh
Here is the thing: if you want to be able to use one or the other most
effectively, you need to learn about
Assuming this does as you say why is the
electronics not included in Flex and other rigs?
It costs money for the extra parts and requires real-estate in the box
making the box bigger. Not everyone wants or needs one but if you
include it in the radio, everyone will have to pay for it. Those
Love the video. The Flex panadaptor really shows the extent of the cancellation
and you can see the signals pop up out of the noise. Can anyone tell what type
of noise is being cancelled?
Edwin Marzan AB2VW
From: anth...@consultexcel.com.au
To: flexradio@flex-radio.biz
Date: Mon, 19
Most likely broadband powerline noise caused by arcing insulators and
connections on high voltage powerlines. I was able to get nearly 20db of
attenuation of this type of noise with my mfj. It al hinges on getting a
good sense antenna
Mark N1UK
- Original Message -
From: Edwin
Hi Guys,
Its not powerline noise at all (I've had the power company out and the
interference unit - they put it down to switch mode power supplies in the
area??
-Original Message-
From: flexradio-boun...@flex-radio.biz
[mailto:flexradio-boun...@flex-radio.biz] On Behalf Of Mark
Are there any FLEX Users who have had success with RMS Express v. 0.3.0.0?
If so could you share your configuratation with me?
Rick indicated that there are potential issues with WINMOR and FLEX radios.
Specifically:
Latency of the Flex receiver. Since RMS Express/WINMOR is a real
time ARQ
Yes it did sound a bit too raw for powerline noise.
I am lucky that I am the only house around, so any interference is from my
house only apart from the power lines.
Mark N1UK
- Original Message -
From: Anthony Martin anth...@consultexcel.com.au
To: 'Mark Robinson'
I am not familiar with RMS Express, but when timing is critical, make
sure that the buffers between PowerSDR/ VAC / Application are set up
correctly. Buffer over/under runs can cost time and CPU cycle times..
Maybe someone else has some actual RMS Express experience that can help.
73,
Hello!
The noise blanker (like a built in antenna tuner) could be named better.
It would truly be a wonderful if such a device existed. But it doesn't.
The best way to test the feature is to power something up that generates
repetitive noise. A hair dryer and/or an electric drill are good
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