On 08/06/2013 05:30 AM, Chris Albertson wrote:
> Yes, but the TV tuners do all the "hard part" that is getting a big chunk
> of bandwidth into your computer. You have to build a mixer and a LO to
> down or up convert the RF to what the tuner can handle but LOs and mixers
> and filters are the eas
On 08/06/2013 02:08 AM, John Ackermann wrote:
> The DTV dongles are very cute and really great educational devices,
> but one thing to keep in mind is that they have 8 bit A/D converters
> and consequently pretty limited dynamic range. And the frequency
> accuracy/stability is pretty horrific for
Yes there are complete autopilot system with integrated gyros,
accelerometer compass horizon sensors and so on. You give the AP some
waypoints the it will fly to them. Basically a drone controller. I think
you can have one for about $100 in hardware.
http://ardupilot.com
On Mon, Aug 5, 2013
Yes, but the TV tuners do all the "hard part" that is getting a big chunk
of bandwidth into your computer. You have to build a mixer and a LO to
down or up convert the RF to what the tuner can handle but LOs and mixers
and filters are the easy part
On Mon, Aug 5, 2013 at 2:25 PM, Lizeth Norman
>
>
> If you stay on Windows instead of Linux, you will find many more SDR
> programs, and more refined. If instead you prefer spend your time with
> configure, compilations, debugging, search of the correct version of the
> libraries, etc. then I warmly recommend you Linux... << flame suits on >>
They also make nice panadapters...
On Aug 5, 2013, at 17:25, Lizeth Norman wrote:
> Gents,
> These things are limited in usefulness by themselves. They need decent
> filtering and preamps for any weak signal stuff.
> If all you want to do receive the local channels, then these are for you!
> Nor
Gents,
These things are limited in usefulness by themselves. They need decent
filtering and preamps for any weak signal stuff.
If all you want to do receive the local channels, then these are for you!
Norm n3ykf
On Mon, Aug 5, 2013 at 5:21 PM, Don Latham wrote:
> About $85 US. But a TV tuner typ
Marki the "smart" search engine came back with:
Prof David Mills: http://www.eecis.udel.edu/~mills/ntp/html/pps.html
Pulse-Per-Second (PPS) Signal Interfacing
Hardware: http://www.vk2hmc.net/blog/?p=583
If using Linux you need kernel version > 2.6.39.4 or version 3 kernel as the
PPS interface i
> Having a Linux/FreeBSD PC synchronized using NTP/chrony, what would be the
> best way of generating an output 1 PPS signal on a (hardware) serial port ?
I haven't tried it.
On Linux, /drivers/pps/generators/Kconfig (from kernel-devel or kernel
sources) says:
# PPS generators configuration
Did you /increase/ the elevation mask?
Jim
wb4...@amsat.org
On 8/5/2013 8:06 PM, gandal...@aol.com wrote:
Many thanks to those who commented on this and apologies for the delayed
response, having spent a few days in an internet free zone I've also had to
contend with a couple of power failures s
The DTV dongles are very cute and really great educational devices, but
one thing to keep in mind is that they have 8 bit A/D converters and
consequently pretty limited dynamic range. And the frequency
accuracy/stability is pretty horrific for anyone on this list. :-)
I keep one in my laptop
Many thanks to those who commented on this and apologies for the delayed
response, having spent a few days in an internet free zone I've also had to
contend with a couple of power failures since returning but am just about
getting back to normal again, whatever normal might be:-)
As suggest
I didn't see this mentioned (then again, I get tired of scrolling thru
all the copies of all the responses).
January '13 issue of QST had a nice article by K3ACT about how to
actually get all the pieces (hardware and software) hooked up, along
with a simple upconverter to push the LF end down as
Probably this was asked before but in searches I only find how to use
an external 1 PPS GPS signal for NTP synchronization.
Having a Linux/FreeBSD PC synchronized using NTP/chrony, what would be
the best way of generating an output 1 PPS signal on a (hardware)
serial port ?
For timing I've seen t
About $100.
-John
=
> On 08/05/2013 04:56 PM, J. Forster wrote:
>>
>>
>> Has anyone played with this thing?
>>
>> http://microsat.com.pl/product_info.php?products_id=35
>>
>> If you add a laptop, is the thing a complete radio? It seems to be far
>> too
>> cheap to believe.
>>
>> -Jo
Hi
If it's cheap enough to make disappointment a minor issue - go for it.
There will be spurs at the clock frequency(s) and harmonics there of. At some
input level you will seeintermod issues. Weather they are bad enough for you to
care about - only a trial can tell.
Bob
On Aug 5, 2013, a
> Hi John,
>
> I don't think you quite got it yet. All of those types of "Dongles"
> have no frontend filtering and no gain control (AGC).
Oh, I'm all too familiar w/ SAs without YIG preselectors. That's why I've
always preferred AILtech to HP.
> Basically it is a
> "diode" (so to speak) looking
While I have not done this yet, there is supposedly software that allows
direct sampling down to DC.
Some of the devices have a hole in the coverage around 1200 MHz so watch
out. I think the RTL2832 is ok though.
Tom
- Original Message -
From: "Bob Stewart"
To: "Discussion of prec
On 8/5/2013 11:52 PM, J. Forster wrote:
<75 to >1300 MHz
USB
Ability to function as a crude SA.
Not crawling w/ birdies or aliasing issues.
Will run on Win XP.
Demod selecttable for all modes at all frequencies.
In a package, rather than a loose PCB.
<$150
I bought this from China :
http://ti
Hi John,
I don't think you quite got it yet. All of those types of "Dongles"
have no frontend filtering and no gain control (AGC). Basically it is a
"diode" (so to speak) looking at the spectrum from DC to Daylight, even
though they have a limited range. So, yes, there will be birdies and
If the windo can be slid under SW control, that's enough. Flat, in this
context is something like +/- 6 dB... non-critical. I want to be able to
see spurs, etc. I don't need much dynamic range either.
-John
===
> Just be aware that they're not wideband units. The sampling rate d
I assume you mean XP?
Several reasons:
Used Thinkpads that will run XP are cheap and plentiful.
I hate Vista and Win 7...
I'm interested in a turnkey tool, not SW 'elegance', etc.
-John
==
> On Mon, Aug 5, 2013 at 2:52 PM, J. Forster wrote:
>
>> OK. Thanks everybody. Can you ple
The 240-420 MHz gap is a killer for me. Much of my interest lies in that
band.
Also, I'd much prefer a 20 MHz plus SA function.
-John
==
> For that money, look for a used Funcube Dongle.
> The new Funcube Dongle Pro+ is just under 200 USD but it goes down to
> 150 kHz and up to 1.9 G
On Mon, Aug 5, 2013 at 2:52 PM, J. Forster wrote:
> OK. Thanks everybody. Can you please reccomend a make/model?
>
>
> Will run on Win XP.
The above seems an odd requirement. Why?
--
Chris Albertson
Redondo Beach, California
___
time-nuts mailing
Just be aware that they're not wideband units. The sampling rate defines the
bandwidth of any sample, and the fact that it's 8 bits limits the resolution.
So, you can essentially look at up to a 2MHz slice anywhere you want within
64MHz to 1.7GHz. Of course, you could move your center frequen
bro...@pacific.net said:
> This is the only low cost receiver I've found that has 10 Hz update rate and
> that's very important for aircraft flight control systems.
Is there real information in all of those updates, or is it just doing the
traditional 1 per second calculations and extrapolatin
OK. Thanks everybody. Can you please reccomend a make/model?
I'd like something like:
<75 to >1300 MHz
USB
Ability to function as a crude SA.
Not crawling w/ birdies or aliasing issues.
Will run on Win XP.
Demod selecttable for all modes at all frequencies.
In a package, rather than a loose PCB.
Google DVB-T and RTL2832. I bought a device about some months ago for about
$20. It does actually work as advertised, though this one looks nicer than the
one I got. Apparently the guy who was writing the linux driver for these
(Antti Polisaari of Finland) noticed a feature that allowed it to
About $85 US. But a TV tuner type is about $24.
J. Forster
> Has anyone played with this thing?
>
> http://microsat.com.pl/product_info.php?products_id=35
>
> If you add a laptop, is the thing a complete radio? It seems to be far
> too
> cheap to believe.
>
> -John
>
> ===
>
>
Has anyone played with this thing?
http://microsat.com.pl/product_info.php?products_id=35
If you add a laptop, is the thing a complete radio? It seems to be far too
cheap to believe.
-John
===
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Hi,
I'm looking for 3 scales for the HP 8620C.
2-6.2 Ghz
6-12.4 Ghz
2-18.6 Ghz
I have an extra 12-18.6 to trade?
Thanks,
Corby Dawson
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Hi:
The 66 channel GPS receiver really can't track 66 satellites because there are not that many, but having that many
channels greatly reduces time to first fix.
This is the only low cost receiver I've found that has 10 Hz update rate and that's very important for aircraft flight
control syste
> I do mai for a living -- we use SpamCop, SpamHaus (SORBS) and Sophos
> and have no prolems (that we can't resolve) with them.
Sorry that should have read SpamTeq (SpamHaus) and when I say "you" I
mean someone not getting mail from an originating address listed in a
BL database.
_
I would appreciate it, if you would read more carefully... It's about
abusive DNSBLs.
I don't know from where you got the funny idea that SORBS has something
to do with Spamhaus...
Look up Michelle (ex-Matthew) Sullivan to learn a bit about SORBS'
history... in the mean time bought by GFI, and n
Date: Mon, 05 Aug 2013 17:17:37 +0300
> From: MailLists
> While I'll agree on Spamhaus' decent services, SORBS has definitely a
> very shoddy history (the internet is full of "beneficiaries"'s stories).
You have the roles reversed. If you have a problem with a BL the
resolution is with your SMTP
I'm always glad for inputs. I like learning things.
The design decisions were made based on parts in hand for the level
translators. I don't like stocking a lot of different parts. I use those for
other circuits where 2 bit translation is appropriate.
I usually pick chips based on cost and t
You might want to check out http://diydrones.com/ as well.
Thomas Valerio
> This chatter about model aircraft GPS got me to wondering if there now
> off-the-shelf flight control systems for model planes that will do nav
> and/or attitude control? I know there are mini-gyros, but I think they
There are quite a few off the shelf model aircraft controllers. As you can
imagine, those based on GPS and/or MEMS IMUs are not terrifically high
performing. That said, I have seen very promising results from thermopile
based systems - good discussion in the link below
http://paparazzi.enac.fr/wik
Wow! IR horizon sensors for pitch and roll model aircraft! That is neat.
Thanks,
-John
==
> There are quite a few off the shelf model aircraft controllers. As you can
> imagine, those based on GPS and/or MEMS IMUs are not terrifically high
> performing. That said, I have seen
On Mon, Aug 05, 2013 at 06:35:25AM -0700, M. Simon wrote:
> A while back some of the folks on the list were discussing
> RS-232 interfacing.
> I may have something useful for those of you still wrestling
> with the problem. An RS-232 interface (Male or Female DB-9)
> that can take any voltage fro
While I'll agree on Spamhaus' decent services, SORBS has definitely a
very shoddy history (the internet is full of "beneficiaries"'s stories).
Besides being very "trigger happy", and unresponsive on requests, the
owners at least used to force a "fine", err. "donation" for delisting.
Since it ha
This chatter about model aircraft GPS got me to wondering if there now
off-the-shelf flight control systems for model planes that will do nav
and/or attitude control? I know there are mini-gyros, but I think they are
only good enough for attitude control.
Last time I was into this, if you lost rad
If you mean Comcast, I can well see their point.
Over half the malware spam I get comes from Comcast and Comcastbussiness.
Just because they are big, does not mean they should be given an exemption
from being responsible.
YMMV,
-John
> I agree with John, you can't go around bloc
I wish there were a way of blocking all Chinese ISPs. I'm sick of "Dr Oz"
and similar incessant crap.
YMMV,
-John
=
> Hi
>
> I run the same sort of stuff, and have the same sort of problems from time
> to time. At one point all of Germany was unable to send me email
>
> Bob
>
A while back some of the folks on the list were discussing RS-232 interfacing.
I may have something useful for those of you still wrestling with the problem.
An RS-232 interface (Male or Female DB-9) that can take any voltage from 1.8 to
5V (nominal) and turn it into full RS-232 levels at 230,40
Jim,
My plan is to make the "10 MHz clock + processor" separate from the GPS
module. Ultimately any GPS pps signal should lock the clock.
This is a work in process and may go through several iterations of hardware.
The micro has a clock out pin so I may add another BNC + 50 ohm driver to use
On 05/08/13 11:42, MailLists wrote:
> Good luck delisting a DNSBL listed IP (block) from those "crusaders"...
> Back some time there was a piss contest between some of those
> "blacklists" on which one would blacklist the whole internet faster.
> In the mean time different "security" providers boug
I agree with John, you can't go around blocking America's largest cable ISP!
We have err opted out of using SORBS now.
-marki
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of MailLists
Sent: Monday, 5 August 2013 8:43 PM
To: Discussion
Good luck delisting a DNSBL listed IP (block) from those "crusaders"...
Back some time there was a piss contest between some of those
"blacklists" on which one would blacklist the whole internet faster.
In the mean time different "security" providers bought up some of those
rabid "blacklists" to
Design so that when that module is no longer available, you've got pins and
software switches to use something else. Lots of one off projects depend on
something surplus or cheap, and rapidly become non-duplicate-able when the
parts supply ends.
On Aug 5, 2013, at 1:18, "M. Simon" wrote:
>
Hi
I run the same sort of stuff, and have the same sort of problems from time to
time. At one point all of Germany was unable to send me email …
Bob
On Aug 5, 2013, at 6:55 AM, "Mark C. Stephens" wrote:
> Yikes! I wish I had known earlier.
> Is it just SORBS or SpamCop, SpamHaus and WPBL as w
Yikes! I wish I had known earlier.
Is it just SORBS or SpamCop, SpamHaus and WPBL as well?
As remedial action I have turned off SORBS blocking.
Really, sorry about this Bob, John, please resend, as I do value your
correspondence even if SORBS led you to believe otherwise.
--marki
-Original
Hi
Comparing A to B is never easy. There is a wide variation between synthetic
quartz processes. The issue with quartz is not so much purity. Synthetic is
many orders of magnitude cleaner than natural. The issue is growth rate.
Natural quartz grew over centuries, synthetic grows in days / weeks
Hi
I had the same problem with some stuff I tried to send Mark.
Bob
On Aug 5, 2013, at 5:29 AM, John Miles wrote:
> Mark, I'm having trouble replying to your email, as your ISP is using a spam
> blacklist (SORBS) that blocks the SMTP servers used by the largest American
> cable ISP. Do you ha
Mark, I'm having trouble replying to your email, as your ISP is using a spam
blacklist (SORBS) that blocks the SMTP servers used by the largest American
cable ISP. Do you have another ISP you can use to receive email?
-- john, KE5FX
Miles Design LLC
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