In message 4e30be7c.7060...@comcast.net, Steve Longcor writes:
The M12 is 3V logic. I assume the net4501 is 5V logic,
No, the net4501 is 3.3V.
Also: COM2's TXD and RXD are available at 3.3V level in the GPIO
connector.
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
This might amuse,
LightSquared promises to replace satellite push-to-talk kit
http://www.theregister.co.uk/2011/07/27/lightsquared_ptt/
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Thanks for the answer Chris. I kind of figured the max232 chip would be pulling
the signal and override any attempts to bypass it.
To the other person a little confused. The GPS in/outputs TTL signals. The
Net4501 is the same way (TTL) coming out of the CPU, but
on the board there is a max232
I know there are those who have a lot of knowledge about pocket watches and
railroad watches so, I know someone with a 992B Hamilton Railroad Special,
21 jewel, lever set, with a Montgomery dial. He seems to think this is a
special watch. Is it?
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Also: COM2's TXD and RXD are available at 3.3V level in the GPIO connector.
Oh man I didn't know that! Time for me to take a second look at the manual.
Thanks!
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Any Hamilton is special in my book.
Brent
On Thu, Jul 28, 2011 at 10:15 AM, John Green wpxs...@gmail.com wrote:
I know there are those who have a lot of knowledge about pocket watches and
railroad watches so, I know someone with a 992B Hamilton Railroad Special,
21 jewel, lever set, with a
Hi
To answer a slightly different question:
Combining a wideband MMIC preamp and a prescaler can be tricky. It's easy to
get it to work and hard to get it to work well. Finding a MMIC preamp that
makes a good limiter is only one of the challenges.
Bob
-Original Message-
From:
On Thu, Jul 28, 2011 at 6:34 AM, Jason Rabel
ja...@extremeoverclocking.com wrote:
.
If it wasn't a TSOP chip I would have just ripped that puppy right out as you
suggested Chris.
TSOP is very easy to hand solder. Maybe easier than a DIP package
because you don't have to flip the PCB over and
a quick search of yahoo groups will no doubt get you the info you seek...
brent evers
Any Hamilton is special in my book.
Brent
On Thu, Jul 28, 2011 at 10:15 AM, John Green wpxs...@gmail.com wrote:
I know there are those who have a lot of knowledge about pocket
watches and
railroad
One TSOP trick: Use fine desolder braid just enough solder to bridge all the
leads on one side, melt all the solder on that side, then with a pointed hobby
knife lightly pry the chip up just enough to disconnect the whole row of leads.
Repeat for other side using tweezers to gently lift the
Hi
Posting *good* pictures to one of the watch message boards is the best way
to answer the question. There are always a lot of small details that count
when you try to decide if it's special or not.
Bob
-Original Message-
From: time-nuts-boun...@febo.com
Technically, he just has to lift the offending pins. My recollection is the
transmitters invert, so that might be an issue.
-Original Message-
From: Robert LaJeunesse rlajeune...@sbcglobal.net
Sender: time-nuts-boun...@febo.com
Date: Thu, 28 Jul 2011 10:08:55
To: Discussion of precise
What a pitty!
I am currently receiving the Xray/Soustons of the 6731 LESSAY chain
in very good conditions (day and night). The Loran-C phase record
against one of my TBolts never exceeds 50 nS and I wish I could have
a predominant over-land path to investigate some possible (?!) seismic
Lifting a pin often causes it to break off. May as well pull the part for
later reuse.
Agree on the inversion issue.
One needs to be careful as 3.3V CMOS logic is usually not (or not exactly)
TTL
compatible.
Crossing power supply boundaries means having to assure the associated pins are
Only lift the transmitter output. Note that by design, 232 ports can be
floated. Receivers all have pull-down resistors. For much of the world today,
if they have a 232 port, it is floating.
A little heat and exacto knife should lift the pin just fine. I've done this
before. It helps to own a
It's a nice watch, probably about the best of the best for mass production
pocket watches. It is, however a mass production watch, and there are tens
of thousands of them still in existence. They were built for a goodly portion
of the 20th century... production stopped in the 1960's.
It is one
Paul Swed writes:
I agree this does not make sense. There is a divider in the way so its not a
preamp.
I'll bite: what does a small-signal model of a prescaler look like?
As a guess, it might be a (flat? highpass?) attenuator (with a great
deal of loss) up to some threshold amplitude, then
Hi
Small signal wise a prescaler looks like a divider.
Below some threshold you (hopefully) get nothing. Above that point you get
various sorts of garbage (which could include self oscillation) unrelated to
the input frequency. Past another point you get an increasingly solid divide
out. The
It would probably behave as some kind of funky mixer when you feed it Fc (single carrier)
and LO. But once you expose it to the real world of multiple carriers, the
output would be a mishmash. I also doubt the noise figure would be useful for any useful
pre-amplification.
But that's with
Thanks Chuck. That kind of information was exactly what I was looking for.
Special is in the eye of the beholder. It does sound like a watch he would
fancy because it would have probably been the kind of watch an engineer
would have carried. Plus, it is a pretty good watch. I saw it briefly.
Hello Folks,
New time nut here.
I have a Fluke 103A frequency comparator which I use with a Z3801 GPS to
other frequency sources.
At 1 time I had a bunch of HP oscillators plug ins and it was great fun to
watch each of these plug ins warm up, move back and for across 10 Mhz.
Finally,
On 07/27/11 10:38 PM, Peter Krengel wrote:
Hi group,
I know my question is time-nuts of topics but as I know
there are some really skilled GHz specialists on the group
I like to ask whether somebody made experience
using a prescaler MMIC (i.e. up to 12GHz) as a very wideband preamp?
Thanks for
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