dgmin...@mediacombb.net said:
> The 1820-0313 is a Fairchild 931HC or Motorola MC931G DTL clocked flipflop.
> I think if you toy with a TTL or CMOS JK-flipflop; it should work with no
> issues. The only caveat would be the 4.2V Vcc. The DTL logic was spec'ed
> to run at 5V, same as TTL, but don'
I would look at using a 74HC series flip flop. Runs down to 2V.
Or perhaps the ECG or NTE 9093D (an ECG-9093D is $1.25 on Ebay). It's a dual
flip flop. You would need to check if the J and K inputs are usable in the
5065A. I think it only has one pin per J/K and the 931G has two AND'd togeth
https://www.febo.com/pipermail/time-nuts/2017-May/105298.html
We recently got our second HP5061B to lock after changing the beam
tube. We did no alignment with the exception of changing the gain on
Beam current. Ion current dropped from 14 to 1 with only a few hours
of operation of the instrument
Hello,
I know that breakout boards for Motorola M12 have been done to death
But…. I am doing a one that fits my needs. Primary to add a 1PPS + TOD as
defined by ITU G.8271 Since most of the equipment I am working with has this as
a standard interface. My plan is to have a AVR to do the p
Dave M wrote:
Poul-Henning Kamp wrote:
In message <1580810140.741428.1494966823...@mail.yahoo.com>, Ulf
Kylenfall via time-nut s writes:
That the 1820-0313 is unobtanium I can understand.Has anyone created
an equvalent based on discretesor is there a suitable SMD "single"
flip-flop li
Poul-Henning Kamp wrote:
In message <1580810140.741428.1494966823...@mail.yahoo.com>, Ulf
Kylenfall via time-nut s writes:
That the 1820-0313 is unobtanium I can understand.Has anyone created
an equvalent based on discretesor is there a suitable SMD "single"
flip-flop like single gates
In message <1580810140.741428.1494966823...@mail.yahoo.com>, Ulf Kylenfall via
time-nut
s writes:
>That the 1820-0313 is unobtanium I can understand.Has anyone created
>an equvalent based on discretesor is there a suitable SMD "single"
>flip-flop like single gatesthat could be suitable?
The GPS-UTC delta is part of the set of data GPS sends down from the
satellites. My GPS clocks will show the time two seconds fast for some amount
of time ranging from 0 to 12 minutes after first-fix because the periodicity of
that particular message is 12 minutes. My guess is that 2 seconds mea
Hi
If you approach this as “restoring a classic car”, then you repair the beast.
From a practical standpoint, looking at the
schematic and what’s in the divider setup ….. it looks like a < $2 PIC or ($3
STM32 board ) would replace almost
everything there. That’s not quite accurate, but it’s p
Starting to trouble-shoot some of the 5065A circuitryI saw that the
(mechanical) clock drive flipflop IC1of the digital divider ass:y A16 is
behaving very strange.
All of the voltage regulator circuitry in this ass:y is working,providing 4.2V
and so on, but IC1 and the two transistorsQ11 and Q
Since future leap seconds aren't known very far in advance, how wise is it
to even claim to handle any possible leap second or time scale conversion,
in a firmware-controlled device that cannot download future leap second
information from the Internet?
The GPS itself presumably knows how to handle
On Sat, May 13, 2017 at 9:58 PM, Mark Sims wrote:
> Converting GPS seconds to Gregorian date/time on the Arduino will be an
> arduous task. You take GPS seconds and add it to the GPS starring epoch to
> get a Julian date. Then add in the number of leap seconds as a fraction of a
> day to get
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