A few months ago I mentioned that I was able to use my Tek 2252 scope as a Time
interval counter.
Yesterday I wrote an EZ GPIB script (thanks to the author of this useful
software !) to collect data via the GPIB port and after three runs alternately
feeding 5 and 10 Mhz signals in to the "
> As an alternative you could build an external circuit (a few uA at 3V
> supply) and generate a signal to inject into the existing Xtal osc with the
> Xtal removed.
In a typical battery operated clock, what fraction of the power goes to the
oscillator and counter and how much goes to the motor
Hi Antonio,
the 32kHz Xtals are 2mm long tuning forks (that is what I believe
although I have not opened one).
You would have very little chance of modifying it and still have
enough Q left for it to oscillate.
As an alternative you could build an external circuit (a few uA at 3V
supply) and
Eugene,
I have two of the DATUM 9390-5054 instruments with the original
antennas and 100 foot feedline that I have above tree line and well
in the clear. I have worked with many of this model receiver and my
experience is that it is not uncommon for them to begin to gather
satellites, having
Jim Lux wrote:
On 5/16/11 2:58 PM, iov...@inwind.it wrote:
Neville,
at present I have not enough skill with micros to solve the problem.
I think I will try modifying a crystal. This would not be that
difficult using
a lapping sheet or the like. And opening the can would be quite easy
using hot
On 5/16/11 2:58 PM, iov...@inwind.it wrote:
Neville,
at present I have not enough skill with micros to solve the problem.
I think I will try modifying a crystal. This would not be that difficult using
a lapping sheet or the like. And opening the can would be quite easy using hot
air.
or a fine
Apologies to the rest of the list ...
@Bob Camp,
Thank you for your e-mail! I tried to send you a reply twice, but both attempts
bounced on what looks like spamcop handling mail for your domain. First attempt
was a direct reply-to with a legit reply header. The second attempt was a new
e-mail,
Neville,
at present I have not enough skill with micros to solve the problem.
I think I will try modifying a crystal. This would not be that difficult using
a lapping sheet or the like. And opening the can would be quite easy using hot
air. This is the fastest way for me, and the device will con
Lots of good answers
I do not select a mask
Most of my rcvrs will guess are 10 degrees mask. But that just happens to be
were they come in at.
My antenna is at 45 foot on a 95 foot tower on the south side. There are 70
foot trees around me. I use 1/2" catv hard line very low loss and free. Hit
a 4
Since the last few post on that "alternate list" were by me, and were never
answered, my working assumption was much the same thing.
Apparently not enough interest. Oh well, slowly plow forward on my own then.
Which is a bit of a pity, since I am sure that with a few people (3 or so) this
whole
Hi
I think the reference is to whole "take it off line" part of the discussion.
The reasons for not doing so were explained at the time, so really don't
require repeating again.
Bob
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Scott
At 01:38 PM 5/16/2011, Bill Hawkins wrote:
Part of the problem is that this list discourages off-list
discussion by not providing the individual's email address.
What? I'm looking at the from: header and see "Bill Hawkins" .
--
newell N5TNL
__
As I recall, the thread looked like marketing research for a
profitable product, not design research for the benefit of
list members.
Part of the problem is that this list discourages off-list
discussion by not providing the individual's email address.
If the original poll request gave the sender
I was more wondering why the discussion never moved, not why the
project discussion died here. But this is probably enough bandwidth
wasted again. :)
On Mon, May 16, 2011 at 12:46 PM, Bob Camp wrote:
> Hi
>
> The issue that killed it was at least one member objecting quite strenuously
> to the
Hi
The issue that killed it was at least one member objecting quite strenuously
to the bandwidth used.
The counter project was the initial spark that started it all, but the
objective of the polls was more general. You can indeed build a piece of
hardware and then tell it what it is after it's bu
I'll add that for some reason the discussion never morphed over to an
alternate list created just to discuss a counter project without
taking up bandwidth here. Not sure that there was enough interest.
Other Bob
On Mon, May 16, 2011 at 11:53 AM, Bob Camp wrote:
> Hi
>
> The polls ran for less t
Hi
The polls ran for less than a day before they drew considerable fire for
using too much bandwidth. Since we still had several steps to go (what to
design, what to design it with, and who to design what), it was dropped.
Doing a group general purpose FPGA based timing board isn't going to happen
Another way to go is to move the GPS receiver so that it is close to
the antenna, then use a long RS232 serial cable. Or if the distance
is more than 100 feet uses a balanced type of serieal. You can use
Cat-5 cable for this and there ar enough pairs in cat-5 so that you
can send DC power on the
Nope - you're right - most don't go below 1MHz. Got a little loose
with my K's and M's I guess. Kinda like - "what's 3dB among friends?"
My apologies for the stray lead. Thanks for catching it Jim.
Brent
On Mon, May 16, 2011 at 10:21 AM, Jim Lux wrote:
> On 5/16/11 6:30 AM, brent evers wrote
On 5/16/11 6:30 AM, brent evers wrote:
Can't you just use a programmable crystal? Digikey will do this for
you prior to ship. Search on crystal, then under the field type,
filter by "Programmed by Digikey". Four types pop up as in stock.
Not sure if they would meet you footprint requirement,
Do you have a mask set on the signal level? I have two tbolts running
that are completely surrounded by trees, and I was getting satellites
popping in and out. I dropped the AMU to 0.0 and it is much more
stable as to not dropping birds, although I have absolutley no idea
what effect that might h
Can't you just use a programmable crystal? Digikey will do this for
you prior to ship. Search on crystal, then under the field type,
filter by "Programmed by Digikey". Four types pop up as in stock.
Not sure if they would meet you footprint requirement, but its worth a
shot.
Brent
On Mon, May
ok
Indeed now that its morning and different glasses I would have seen that.
There you go dangerous at 11pm
On Sun, May 15, 2011 at 11:39 PM, WB6BNQ wrote:
> Paul,
>
> If you had read more carefully what I wrote you would see that I said
> better coax
> "WHEN HE PUTS IT OUTSIDE."
>
> thank you,
Antonio,
it is quite easy to make an external circuit that uses a 32kHz xtal
and divides
it down to siderial seconds. It is also easy to drive most analog
quartz clock movements from
an external circuit.
Just what signal do you need? What frequency? and what does it drive?
(an alternate po
The background of my request is an OT story. Just to mention briefly, I already
have an ordinary (non-radio-controlled) clock machine which turns a miniature
torsion balance in a sealed glass vessel. It runs on a single AA battery. No
extreme accuracy needed. I wont to modify the rate to siderea
On Mon, 16 May 2011 00:01:54 +0200 (CEST)
"iov...@inwind.it" wrote:
> >Heh.. I cheated and used a 3325B to make whatever frequency we wanted.
> >(even better, you can use GPIB to change the frequency vs time to make a
> >"clock" that displays unusual things like "height above horizon" or
> >"a
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