[time-nuts] time-nuts Digest, Vol 58, Issue 51

Charles Rushing crushin2000 at austin.rr.com
Fri May 22 18:11:39 UTC 2009


Excellent Paul!  Many thanks for taking the time to prepare this data for
me.  I've no idea which variation mine is, but I guess I can assume (for
now) that it doesn't require an external timebase because there's only one
connector on the back.

I'll hook up power and see what happens.  As soon as the smoke clears I'll
let you know the outcome.  Heh.

Again many thanks.

Chuck
WA5MUV


-----Original Message-----
From: Paul Nelson [mailto:drhydro at qwest.net] 
Sent: Thursday, May 21, 2009 11:29 PM
To: time-nuts at febo.com; Robert Atkinson; Charles Rushing; Bill Hawkins
Subject: Re: time-nuts Digest, Vol 58, Issue 51

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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