Noel,
The 'roofing filters' do not impact the I/Q output.
73,
Don W3FPR
On 3/13/2018 7:34 PM, NOEL POULIN wrote:
Hello
I wonder if the optional 'roofing filters' is added to the KX3 if that
effects the I/Q output bandwidth?
__
Hello
I wonder if the optional 'roofing filters' is added to the KX3 if that
effects the I/Q output bandwidth?
Thanks very much
Noel
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Help:
Thanks to all for replies and tips. Turns out that the radio as I received it
(factory assembled) had the “xfil3” setting for the roofing filters at “not
install” rather than at “nor”
I changed the setting to “nor” and now the roofing filters do kick in as I
narrow the BW with the PBT
installed.
Mark
KE6BB
From: Gerry learygerrylear...@icloud.com
Sent: Sat, Dec 7, 2013 at 4:34 AM
To: Mark Petiford rv6am...@yahoo.com
Subject: Re: [Elecraft] KX3 roofing filters
I am a new KX3 user, but I don't know how to tell if those filters are on or
not?Sent from my
I finally! got to power up my KX3 that I bought in February. Pathetic, really,
but due to new job, lots of travel, etc.
I have the KXFL3 roofing filters. As I understand the manual, the roofing
filters should kick in automatically as I narrow the PBT. But mine don’t.
Sorry for what is
Maybe you have the RX SHFT set to 8 instead of nor in the menu? Or maybe
you have dual watch feature enabled? Either of these will prevent the roofing
filter from being engaged.
73,
Matt VK2RQ
On 07/12/2013, at 11:42 AM, JEFFREY BLUMENFELD jeffreyblumenf...@mac.com
wrote:
I finally! got to
@mailman.qth.net
Subject: [Elecraft] KX3 roofing filters
I finally! got to power up my KX3 that I bought in February. Pathetic, really,
but due to new job, lots of travel, etc.
I have the KXFL3 roofing filters. As I understand the manual, the roofing
filters should kick in automatically as I narrow
Thanks for your suggestions. Will try all this on a future SOTA group
activation.
73 de Pierre VE2PID KX3 S/N 190
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Hello to all.
Maybe that I don't understand the real utility of the roofing filter but I
observed this. Last saturday, we were on a SOTA summit using two KX3s about 40
feet appart transmitting CW at 5 W. And even with the roofing filters on, we
heard each other's sending as a diffuse noise. I
Hello Pierre,
It is most likely not a roofing filter issue. Rather it is probably a local
oscillator leakage issue. Set the RX ISO menu item to ON and I suspect
the problem will significantly diminish, if not disappear. See page 38 of
the current KX3 owner's manual (Rev B4) for this menu item and
Pierre,
The roofing filters may not necessarily help with such strong signal
rejection as you would have had with 2 KX3s transmitting simultaneously
on different parts of the same band.
The usefulness of the roofing filters is to protect the receiver front
end from normal level signals that
You didn't mention whether the two radios were on the same band, different
bands, or odd harmonic bands like 40 and 15. Or, was it on any and all
combinations?
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Pierre,
I think what you were hearing was low-level transmit phase noise. The
KX3 has very low phase noise, but with the two radios on the same band
and only 40 feet apart, during quiet conditions, the TX phase noise
floor could be above MDS. Roofing filters won't help with this, but
the
Not a mechanical filter, but a low noise active audio filter running
around 11 KHz prior to the ADC. The 4 selectable bandwidths will help keep
unwanted off-signal energy out of the ADC.
-Bruce, N1RX
I think that I heard Wayne say at the Elecraft display in Dayton that they
were mechanical
Fellow Elecrafters:
Does anyone have info on the KX3 roofing filters, i.e. how many can the KX3
contain??? Bandwidths???
Looks like the ultimate portable rig to mesure hope they can keep up with
the expected demand (grin).
73, Joe W2KJ
From the new KX3 web page, the optional roofing filters:
KXFL3 Roofing Filter Module (500/1500/2700/3800 Hz)
The one option gives you all four roofing filters.
Al N1AL
On Thu, 2011-05-26 at 15:01 -0400, Joseph Trombino, Jr wrote:
Fellow Elecrafters:
Does anyone have info on the KX3
Ah. Extremely important point. NOT at all apparent from the KX3
page, especially when used to the one filter, one bandwidth paradigm.
As it stands it reads like four available, but only one installable.
On the web page, you may want to change...
Narrow roofing filter option with four
At 04:37 PM 5/26/2011 -0400, you wrote:
Ah. Extremely important point. NOT at all apparent from the KX3
page, especially when used to the one filter, one bandwidth paradigm.
As it stands it reads like four available, but only one installable.
On the web page, you may want to change...
Narrow
Jim Dunstan-2 wrote:
My interpretation is that the narrow roofing filter option is variable
with 500, 1500, 2700, and 3800 hz steps that follow the DSP filter as it's
bandwidth is changed.
These filters are ahead of the DSP at baseband. They protect the ADC from
overload and should
At 03:30 PM 5/26/2011 -0700, you wrote:
Jim Dunstan-2 wrote:
My interpretation is that the narrow roofing filter option is variable
with 500, 1500, 2700, and 3800 hz steps that follow the DSP filter as it's
bandwidth is changed.
These filters are ahead of the DSP at baseband. They
I am wondering what kind of filter it is as it certainly can't be a xtal
filter at this vy low frequency has to be some kind of software
controlled filter.
I think that I heard Wayne say at the Elecraft display in Dayton that they
were mechanical filters.
Mike / KK5F
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