On Mon, Feb 20, 2012 at 10:56 AM, Carol F. Milazzo, KP4MD/W6
kp...@cfmilazzo.com wrote:
Here is a description of a simple low pass filter with a 510 kHz cutoff
frequency I built for my FLEX-3000 http://www.qsl.net/kp4md/lpfilter.htm
I still think that a tunable preselector makes more sense
On Mon, Feb 20, 2012 at 9:04 PM, Ralph W5JGV w5...@w5jgv.com wrote:
Don't get me wrong; I LOVE this rig, but I'm going to keep some of my old
manually operated stuff as a backup, just in case.
The problem is that PowerSDR makes assumptions about how you want to use
the radio rather than just
I agree a bandpass filter makes sense for just 472-479 kHz. My low-pass
filter was intended for receiving the entire LF range.
Carol, KP4MD/W6
On Tue, Feb 21, 2012 at 8:25 AM, Brian Lloyd brian-wb6...@lloyd.com wrote:
On Mon, Feb 20, 2012 at 10:56 AM, Carol F. Milazzo, KP4MD/W6
/W6 kp...@cfmilazzo.com
To: Brian Lloyd brian-wb6...@lloyd.com
Cc: flexradio@flex-radio.biz
Subject: [Flexradio] The new 472-479 kHz band - REAL DX
Date: Tue, Feb 21, 2012 8:39 am
I agree a bandpass filter makes sense for just 472-479 kHz. My low-pass
filter was intended for receiving the entire LF
On Tue, Feb 21, 2012 at 8:47 AM, Robert Costa, KB6QXM kb6...@yahoo.comwrote:
What I want to see is someone design a tuneable preselector with many
adjustable parameters.
Anyone up to the task. I will even build your website to market it.
Signal levels tend to be pretty strong unless using a
-479 kHz band - REAL DX
Date: Tue, Feb 21, 2012 9:35 am
On Tue, Feb 21, 2012 at 8:47 AM, Robert Costa, KB6QXM kb6...@yahoo.com wrote:
What I want to see is someone design a tuneable preselector with many
adjustable parameters.
Anyone up to the task. I will even build your website to market
: Robert Costa, KB6QXM kb6...@yahoo.com
To: Brian Lloyd brian-wb6...@lloyd.com
Cc: Carol F. Milazzo, KP4MD/W6 kp...@cfmilazzo.com;
flexradio@flex-radio.biz
Sent: Tuesday, February 21, 2012 12:48:24 PM
Subject: Re: [Flexradio] The new 472-479 kHz band - REAL DX
Brian,
Yes I agree about your
: Carol F. Milazzo, KP4MD/W6 kp...@cfmilazzo.com,
flexradio@flex-radio.biz flexradio@flex-radio.biz
Subject: [Flexradio] The new 472-479 kHz band - REAL DX
Date: Tue, Feb 21, 2012 10:33 am
Hi All,
I'm not sure what kind of parameters you'd like to be able to adjust Brian. I
think that if you put
...@lloyd.com
Cc: Carol F. Milazzo, KP4MD/W6 kp...@cfmilazzo.com;
flexradio@flex-radio.biz flexradio@flex-radio.biz
Sent: Tuesday, February 21, 2012 1:33:35 PM
Subject: Re: [Flexradio] The new 472-479 kHz band - REAL DX
Hi All,
I'm not sure what kind of parameters you'd like to be able to adjust Brian
On Tue, Feb 21, 2012 at 10:33 AM, Ken Alexander k.alexan...@rogers.comwrote:
Hi All,
I'm not sure what kind of parameters you'd like to be able to adjust
Brian.
I don't think there are any besides frequency (tuning) and possibly preamp
gain.
I think that if you put a good filter at the
Hi All,
What I want to see is someone design a tuneable preselector with many
adjustable parameters.
At these frequencies and with a load impedance of 50 ohms
you can come a long way with a good 1 mH inductor and a
tuneable capacitor in series with the antenna. The 1 mH
inductor is in the
[mailto:flexradio-boun...@flex-radio.biz] On Behalf Of Ralph W5JGV
Sent: Monday, February 20, 2012 01:45
To: flexradio@flex-radio.biz
Subject: Re: [Flexradio] The new 472-479 kHz band - REAL DX
Surprised at your observation, I checked my 5000a and noticed that if
RX1 preamp is off, I get same results on both
At 01:45 AM 2/20/2012, Ralph W5JGV wrote:
Surprised at your observation, I checked my 5000a and noticed that if
RX1 preamp is off, I get same results on both RXes at 485 KHz, but if
RX1 preamp is on, the baselines are different and I see an apparent
difference of 30-something dB.
Are you
Here is a description of a simple low pass filter with a 510 kHz cutoff
frequency I built for my FLEX-3000 http://www.qsl.net/kp4md/lpfilter.htm
Carol, KP4MD/W6
___
FlexRadio Systems Mailing List
FlexRadio@flex-radio.biz
+1 Thanks for the information.
On Mon, Feb 20, 2012 at 10:56 AM, Carol F. Milazzo, KP4MD/W6
kp...@cfmilazzo.com wrote:
Here is a description of a simple low pass filter with a 510 kHz cutoff
frequency I built for my FLEX-3000 http://www.qsl.net/kp4md/lpfilter.htm
Carol, KP4MD/W6
I am a newbe to flex but looking at your screenshot it looks like
the preamp
for RX1 is on and the preamp for RX2 is off. Could that be messing things
up?
Sigh... I suppose this is what software radio is all about - frustration!!
G
I have NO idea how the preamp appears to be turned on in
My Flex-5000 is utterly deaf below the U.S. AM broadcast band. Can't even
pick up
local airport Non-Directional Beacons.
But I do some longwave listening with my old Kenwood TS-850/HF vertical and
often
hear European AM broadcast stations in the 150-200 kHz range even from my
QTH in
Missouri.
in there somewhere! :-)
73,
Ken
VE3HLS
From: Jeff Singer jsin...@i1.net
To: flexradio@flex-radio.biz
Sent: Sunday, February 19, 2012 10:02:51 AM
Subject: [Flexradio] The new 472-479 kHz band - REAL DX
My Flex-5000 is utterly deaf below the U.S. AM broadcast band. Can't
flexradio@flex-radio.biz
Subject: [Flexradio] The new 472-479 kHz band - REAL DX
Date: Sun, Feb 19, 2012 7:32 am
I'm surprised the Flex-5000 is so deaf. My 1500 receives perfectly well down
to about 480 something kilohertz, then the bandpass filter clicks out and all
heck breaks loose. Lots
.
Jeff
K0OD
From: Ken Alexander [mailto:k.alexan...@rogers.com]
Sent: Sunday, February 19, 2012 9:32 AM
To: Jeff Singer; flexradio@flex-radio.biz
Subject: Re: [Flexradio] The new 472-479 kHz band - REAL DX
I'm surprised the Flex-5000 is so deaf. My 1500 receives perfectly well
Hi Jeff and all,
But I do some longwave listening with my old Kenwood TS-850/HF
vertical and often hear European AM broadcast stations in the
150-200 kHz range even from my QTH in Missouri. Radio France
Inter can often be heard from local sunset until
sunrise in Europe on 162 kHz. The BBC
At 11:41 AM 2/19/2012, Jeff Singer wrote:
Ken, I was likewise surprised by your statement about successfully using the
Flex-1500 to receive 600 meter ham beacons. I've read Flex discussion
boards for several years. To the very limited degree that users comment on
the lowfer receive performance
-
From: flexradio-boun...@flex-radio.biz
[mailto:flexradio-boun...@flex-radio.biz] On Behalf Of Jerry Flanders
Sent: Sunday, February 19, 2012 12:59 PM
To: Jeff Singer; 'Ken Alexander'; flexradio@flex-radio.biz
Subject: Re: [Flexradio] The new 472-479 kHz band - REAL DX
At 11:41 AM 2/19/2012
My Flex-5000 is utterly deaf below the U.S. AM broadcast band. Can't even
pick up local airport Non-Directional Beacons.
My F5K has RX2 installed. I have noticed that the sensitivity of RX1 is 37
dB poorer than RX2.
AT 7 MHz, the gain difference between the two receivers is only 1 dB.
And
From: Jeff Singer jsin...@i1.net
To: 'Ken Alexander' k.alexan...@rogers.com; flexradio@flex-radio.biz
Sent: Sunday, February 19, 2012 11:41:48 AM
Subject: RE: [Flexradio] The new 472-479 kHz band - REAL DX
Ken, I was likewise surprised by your statement about successfully
.net; 'Ken Alexander' k.alexan...@rogers.com;
flexradio@flex-radio.biz
Sent: Sunday, February 19, 2012 12:58:40 PM
Subject: Re: [Flexradio] The new 472-479 kHz band - REAL DX
At 11:41 AM 2/19/2012, Jeff Singer wrote:
Ken, I was likewise surprised by your statement about successfully using the
Flex
Surprised at your observation, I checked my 5000a and noticed that if
RX1 preamp is off, I get same results on both RXes at 485 KHz, but if
RX1 preamp is on, the baselines are different and I see an apparent
difference of 30-something dB.
Are you using the same settings on both receivers?
On Sun, Feb 19, 2012 at 3:05 PM, Ken Alexander k.alexan...@rogers.comwrote:
I just checked on my 1500 and what I notice is that when I change
frequency from 481 kHz to 480kHz whatever filter is currently in the front
end is removed/bypassed because and the receiver front end is wide open to
-radio.biz
Sent: Sunday, February 19, 2012 8:03:52 PM
Subject: Re: [Flexradio] The new 472-479 kHz band - REAL DX
On Sun, Feb 19, 2012 at 3:05 PM, Ken Alexander k.alexan...@rogers.com wrote:
I just checked on my 1500 and what I notice is that when I change frequency
from 481 kHz to 480kHz
: Jerry Flandersjefland...@comcast.net; Jeff Singerjsin...@i1.net;
flexradio@flex-radio.bizflexradio@flex-radio.biz
Sent: Sunday, February 19, 2012 8:03:52 PM
Subject: Re: [Flexradio] The new 472-479 kHz band - REAL DX
On Sun, Feb 19, 2012 at 3:05 PM, Ken Alexanderk.alexan...@rogers.com wrote:
I
To: Ken Alexanderk.alexan...@rogers.com
Cc: Jerry Flandersjefland...@comcast.net; Jeff Singerjsin...@i1.net;
flexradio@flex-radio.bizflexradio@flex-radio.biz
Sent: Sunday, February 19, 2012 8:03:52 PM
Subject: Re: [Flexradio] The new 472-479 kHz band - REAL DX
On Sun, Feb 19, 2012 at 3:05 PM
-radio.biz
Subject: Re: [Flexradio] The new 472-479 kHz band - REAL DX
Surprised at your observation, I checked my 5000a and noticed that if
RX1 preamp is off, I get same results on both RXes at 485 KHz, but if
RX1 preamp is on, the baselines are different and I see an apparent
difference of 30
To: flexradio@flex-radio.biz
Subject: [Flexradio] The new 472-479 kHz band - REAL DX
Date: Sun, Feb 19, 2012 5:19 pm
The FLEX-1500's low frequency hardware band pass filter starts to roll
off @ 490 KHz very rapidly.
Tim Ellison, W4TME
Product Management, Sales Support
FlexRadio Systems^(TM)
4616
On Sun, Feb 19, 2012 at 5:12 PM, Ken Alexander k.alexan...@rogers.comwrote:
One other thing that would be nice is to have an option to bypass the
built-in front-end filters thus allowing selection of an external filter.
It's not an option, but that's what my 1500 does right out of the box.
Surprised at your observation, I checked my 5000a and noticed that if
RX1 preamp is off, I get same results on both RXes at 485 KHz, but if
RX1 preamp is on, the baselines are different and I see an apparent
difference of 30-something dB.
Are you using the same settings on both receivers?
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