Hi Paul:
I'm presently adapting a chrony chronograph because I want to use the
triggers for timing and other purposes. They've spent a LOT of
engineering time to get proper triggering, and the triggers can easily
be pulled off without disturbing the basic unit. The triggers are robust
and will driv
Hi, Paul--
I have several different ballistic chronographs-- only one of the
ones I have interfaces to a laptop (Oehler Ballistic Laboratory
model).
There are inexpensive chronographs available for a little
over $100.
Some models do provide interface to a laptop as well as
a LOT of built-in fun
Hi Paul,
See http://leapsecond.com/pic/picpet.htm and contact me offline for the USB
part.
What do you use for sensors: acoustic, optical, seismic?
/tvb (iPhone4)
On Aug 26, 2012, at 10:48 PM, Paul Cianciolo wrote:
> Hello Folks
>
> I have been looking at bullet chrographs and wondering if
Hello Folks
I have been looking at bullet chrographs and wondering if I could get the a usb
module to do a interval measurement and display on my laptop.
on a yet to be discovered module to calculate the time interval between the
pulses?
The bullet travels at approx 1050 feet per second.
By spa
Hi;
I may have a LPRO unit, if so I will post pictures.
Best Wishes;
Thomas Knox
> Date: Sun, 26 Aug 2012 21:08:03 -0500
> From: roc...@watzlavick.com
> To: jleik...@leikhim.com; time-nuts@febo.com
> Subject: Re: [time-nuts] re ET-6000 firmware
>
> The manual I have isn't too clear on the di
The manual I have isn't too clear on the differences between the units
but the drawing shows an LPRO tucked into the left front of the unit
with 2 coax cables going to the PC board (EFC, OSC), and one going to an
additional power supply in the right rear. The ET-6000 DAC is 0-5V
(actually 0.5-
First try if it works as it is.
On Sun, Aug 26, 2012 at 11:24 PM, Claudio Girardi <
claudio.gira...@virgilio.it> wrote:
> Hello,
> I have a GPIB option card (PM9626) from a PM6680 and I would like to use
> it in a PM6685.
> Looking at the service manuals, the only difference between the two GPIB
Hello,
I have a GPIB option card (PM9626) from a PM6680 and I would like to use
it in a PM6685.
Looking at the service manuals, the only difference between the two GPIB
cards for the two counters is the FW PROM, so I'm looking for a PM6685
GPIB PROM image or anybody with a PM6685 that could hel
Bob;
I have a TCXO version and wonder apart from the ROM change, what
recommended hardware is required to install a rubidium osc? Is there a
parts list somewhere? I would prefer not to cobble up if I can help it.
I finally got a flash programmer so I uploaded all three ROM image
Good luck!!
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Didier Juges
Sent: 26 August 2012 19:09
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] ET-6000 firmware
KO4BB is busy cutting plywood and bo
KO4BB is busy cutting plywood and boarding windows, will be back to fun stuff
after Isaac...
Didier KO4BB
Robert Watzlavick wrote:
>I finally got a flash programmer so I uploaded all three ROM images
>(TCXO, OCXO, Rub) for the Datum ET-6000 / 9390-6000 to the KO4BB
>website. Last year I sen
Hi all: I'm using buck regulators from our ebay friends, e.g. 130704328176
at a little over $1.00 apiece, settable to 5 v or 12 v or whatever,
capable of 3 A with good heatsink. Foldback protection. Better than a
3-legged fuse, as my good gaffer Argus calls 'em.
Don
Bob Camp
> Hi
>
> The only real
On Sun, Aug 26, 2012 at 3:46 AM, wrote:
> Having played with several solutions I found the best is a 12 V 1 A
> switcher with the output voltage increased to 15 V, check the capacitors
> and if
> necessary replace with 25 V. I laid out a PC board that has a TC7662A
> inverter followed by a 79L12
Having played with most combinations I could think of including the 1764
there is a lot to be said about the stability of the 7812 and mounting every
thing on one plate since power dissipation of the OCXO decreases with
increase in ambient temperature and current fluctuation is minimal since
Hi Bob;
Thanks very much for this resource.
Best Wishes;
Thomas Knox
> Date: Sat, 25 Aug 2012 22:03:34 -0500
> From: roc...@watzlavick.com
> To: time-nuts@febo.com
> Subject: [time-nuts] ET-6000 firmware
>
> I finally got a flash programmer so I uploaded all three ROM images
> (TCXO, OCXO, R
On 08/26/2012 02:07 PM, Bob Camp wrote:
Hi
The only real disadvantage of a 7812 / 340-12 is it's relatively high drop out
voltage compared to a 1764 (or similar). Stability of any of them will be
impacted more by thermal issues than anything else. The colder you can keep the
12V regulator, th
Hi
The only real disadvantage of a 7812 / 340-12 is it's relatively high drop out
voltage compared to a 1764 (or similar). Stability of any of them will be
impacted more by thermal issues than anything else. The colder you can keep the
12V regulator, the more stable it will be. The +12 is by fa
Having played with several solutions I found the best is a 12 V 1 A
switcher with the output voltage increased to 15 V, check the capacitors and if
necessary replace with 25 V. I laid out a PC board that has a TC7662A
inverter followed by a 79L12. Also on the board is a 7812 followed by a 7
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