As most PSs for digital circuitry include a regulator, it's output
impedance at 1Hz is low enough to filter most out of it - see the load
transient response diagram of the used regulator - as the open loop gain
of the regulator's internal error amplifier at such a low frequency is
practically
On 05/16/2012 05:25 AM, Hal Murray wrote:
rich...@karlquist.com said:
FWIW, the E1938A oscillator control board had a happy light LED that
flashed 1 time per second, and sure enough this corrupted the power supply
and affected some applications. We added a command to turn it off.
Why should
Dave,
On 05/16/2012 03:14 AM, David Bengtson wrote:
I'll also be there for the seminar.
Cool! See you there.
As I mentioned in an off-list mail, I have some spare days so I will try
to use them to get out a little. Considering visiting WWVB for instance.
Cheers,
Magnus
Dave Bengtson
I'll be there as well. Glad to hear so many folks from the list are able to
make the journey!
-- john
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Magnus Danielson
Sent: Wednesday, May 16, 2012 12:54 AM
To: time-nuts@febo.com
It would be very easy to use a constant current to drive the LED and simply
short it periodically to provide the blinking without supply current
variations. You would still have short transients in the drive circuit, but
these should be much easier to filter.
Didier KO4BB
Sent from my
By announcing and bragging we expect a full and detailed report!
On Wednesday, 16 May 2012, John Miles wrote:
I'll be there as well. Glad to hear so many folks from the list are able
to
make the journey!
-- john
-Original Message-
From: time-nuts-boun...@febo.com javascript:;
Hi Group;
I am looking forward to everyone getting together. I am open on times to
meet since I live here I can be more flexible. I know Boulder (at least
the good coffee shops) and could help with ideas for a meeting place depending
on group size.
Thanks for keeping me in the loop and let
But if the LED transition was offset any significant amount of time from
the PPS, you wouldn't be able to use it to set your watch!
Dave :-)
On Wed, May 16, 2012 at 10:57 AM, Magnus Danielson
mag...@rubidium.dyndns.org wrote:
Then, to reduce the impact on the PPS signals, the LED on/off
The FCC needs to bow to laws (physics) and properly protect the GPS
spectrum. Despite pretty colored charts on the wall, the actual
operation of some systems don't pay attention to the charts.
A friend of mine put a UHF tv station on the air many years ago, and had
the same problem, actually
On 05/16/2012 07:42 PM, Dave Martindale wrote:
But if the LED transition was offset any significant amount of time from
the PPS, you wouldn't be able to use it to set your watch!
Dave :-)
Well, the offset compensates for the protein computer delay.
Cheers,
Magnus
On Wed, May 16, 2012
Take a look at porous PTFE products like POREX. High gas
permeability, low liquid permeability.
-Bob
On Tue, May 15, 2012 at 11:43 AM, Lee Mushel herbe...@centurytel.net wrote:
Well, remember that Tyvek is not a vapor barrier---that's what makes it so
useful but if you're going to use it I
I always thought it was nice to have the pretty LEDs showing the power
supplies are working, but then you have to find the one that's not lit.
I've seen others that have a 'fail' indicator, but if the power supply
is dead, what powers the fail LED.
The B-1B test stations have an interface
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