[time-nuts] time-nuts Digest, Vol 58, Issue 51
Paul Nelson
drhydro at qwest.net
Fri May 22 04:28:51 UTC 2009
Well, I found some stuff on this clock... from a few handwritten notes I
made several years ago, there exist both types; those that have an
internal timebase, and those that require an external timebase. The
clock that I can put my hands on right now is an A15586; I have a couple
more. The timebase is an E13832-P1, and it consists of a TCXO with an
output frequency of 983.040 Hz and a couple of chips (CD4013 and CD4020)
which output a two-phase square wave signal at 60 Hz to drive the
stepper motor inside the clock. Basic wiring is as follows- there are
usually two connectors on the clock, one of which matches the connector
on the timebase- a 12-pin circular connector, MS27034H12B12PN. The
other, larger, connector is for the ARINC bus stuff.
I've had all of mine working with that timebase.
If your clock has an internal timebase, it should work simply by
powering it with 24v on pins 3 and 4. I don't know which ones do and
which ones don't- there's a whole bunch of variations.
Pin Clock Time base
1 5v lighting n/c
2 5v lighting n/c
3 +16to32v -----------> +16to32v
4 -16to32v -----------> -16to32v
5 Case gnd ------------> Case gnd
6 Ph 1 drive sig in ---> Ph 1 drive sig out- capt clock
7 Ph 2 drive sig in ---> Ph 2 drive sig out- capt clock
8 Ph 1 drive sig out-
F/O clock
9 Ph 2 drive sig out-
F/O clock
10 Ph 1 drive sig out-
F/E clock
11 Ph 2 drive sig out-
F/E clock
12 spare
time-nuts-request at febo.com wrote:
>
> Message: 2
> Date: Thu, 21 May 2009 17:50:33 +0000 (GMT)
> From: Robert Atkinson <robert8rpi at yahoo.co.uk>
> Subject: Re: [time-nuts] 747 Chronometer
> To: crushin at ieee.org, Discussion of precise time and frequency
> measurement <time-nuts at febo.com>
> Message-ID: <240600.56920.qm at web27104.mail.ukl.yahoo.com>
> Content-Type: text/plain; charset=iso-8859-1
>
>
> Hi Charles,
> I had a dig, but could only find info on the current clocks that receive time info on an ARINC 429 serial bus, and an earlier hybrid LCD / mechanical model that needs an external 1PPS (I'd like one of those).
> I've never seen an aircraft clock that needed an external 60Hz signal. Unfortunatly Hayden have been bought up and no longer list instruments. Keep Googling!
>
> Robert G8RPI
>
> --- On Thu, 21/5/09, Charles Rushing <crushin2000 at austin.rr.com> wrote:
>
>
>> From: Charles Rushing <crushin2000 at austin.rr.com>
>> Subject: [time-nuts] 747 Chronometer
>> To: time-nuts at febo.com
>> Date: Thursday, 21 May, 2009, 7:45 AM
>> Greetings To All,
>>
>>
>>
>> Please accept my apologies in advance if this is
>> off-topic.? I have just
>> acquired an aircraft clock, which I've tentatively
>> identified as coming from
>> a Boeing 747.? It's way cool looking and would make a
>> perfect dust collector
>> in my ham shack if I could only power it up.
>>
>>
>>
>> There is a multi-pin military-style twist-lock connector on
>> the back, but no
>> indication of what the pinout may be.? The unit is
>> identified as:
>>
>>
>>
>> "CLOCK, 3" 24 HOUR GMT ELECTRONIC
>>
>> MFD BY A.W. HAYDON CO. PRODUCTS
>>
>> NO. AMER. PHILIPS CONTROLS CORP.
>>
>> Cheshire, Conn.
>>
>> MFR'S. PT. NO. A15551-P1"
>>
>>
>>
>> I've searched the Net for technical documentation, but
>> could only find the
>> reference to the 747.? Does anyone have any
>> information about these clocks,
>> or can someone point me in the right direction?
>>
>>
>>
>> Many thanks in advance.
>>
>>
>>
>> Chuck
>>
>> WA5MUV
>>
>>
--
Paul Nelson W5GNF "When I go, I want to go quietly, in my
Ames, Iowa sleep, like my grandfather- not
Senior Engineer (Retired) screaming, like his passengers."
Sauer-Danfoss Company
(DrHydro at qwest.net)
"More hay, Trigger?"
ex-Cessna 140 N77149 (sigh) "No thanks, Roy, I'm stuffed."
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