Re: [time-nuts] time-nuts Digest, Vol 58, Issue 51
Hi Paul, Glad I didn't say no aircraft clocks use a 60Hz timebase! I wonder if they used a commercial (non-aircraft) movement? The design seems to break the normal aircraft design premise that a single failure should not cause the loss of more than one duplicated system. Unless the clocks have some kind of back-up osvillator loss the the clock source would kill all three clocks. In the UK regulations, clocks sort of slip through a gap. You have to carry one, but it doesn't HAVE to be specifically approved for aircraft use. We used to gent them repaired by a local clockmaker. Regards, Robert. --- On Fri, 22/5/09, Paul Nelson drhy...@qwest.net wrote: From: Paul Nelson drhy...@qwest.net Subject: Re: time-nuts Digest, Vol 58, Issue 51 To: time-nuts@febo.com, Robert Atkinson robert8...@yahoo.co.uk, Charles Rushing crushin2...@austin.rr.com, Bill Hawkins b...@iaxs.net Date: Friday, 22 May, 2009, 5:28 AM 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-requ...@febo.com wrote: Message: 2 Date: Thu, 21 May 2009 17:50:33 + (GMT) From: Robert Atkinson robert8...@yahoo.co.uk Subject: Re: [time-nuts] 747 Chronometer To: crus...@ieee.org, Discussion of precise time and frequency measurement time-nuts@febo.com Message-ID: 240600.56920...@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 crushin2...@austin.rr.com wrote: From: Charles Rushing crushin2...@austin.rr.com Subject: [time-nuts] 747 Chronometer To: time-nuts@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.
Re: [time-nuts] time-nuts Digest, Vol 58, Issue 51
Robert Atkinson skrev: Hi Paul, Glad I didn't say no aircraft clocks use a 60Hz timebase! I wonder if they used a commercial (non-aircraft) movement? The design seems to break the normal aircraft design premise that a single failure should not cause the loss of more than one duplicated system. I can't think of a pilot not carrying his own redundant clock at his or her wrist. Also, the navigation computer has its own clock, which is the subsystem which depends most of time I would suspect, beyond what is needed for communication with the tower for movement coordinations. Cheers, Magnus ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] time-nuts Digest, Vol 58, Issue 51
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:drhy...@qwest.net] Sent: Thursday, May 21, 2009 11:29 PM To: time-nuts@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. PinClockTime base 15v lightingn/c 25v lightingn/c 3+16to32v --- +16to32v 4 -16to32v ----16to32v 5Case gnd Case gnd 6Ph 1 drive sig in ---Ph 1 drive sig out- capt clock 7Ph 2 drive sig in ---Ph 2 drive sig out- capt clock 8Ph 1 drive sig out- F/O clock 9Ph 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-requ...@febo.com wrote: Message: 2 Date: Thu, 21 May 2009 17:50:33 + (GMT) From: Robert Atkinson robert8...@yahoo.co.uk Subject: Re: [time-nuts] 747 Chronometer To: crus...@ieee.org, Discussion of precise time and frequency measurement time-nuts@febo.com Message-ID: 240600.56920...@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 crushin2...@austin.rr.com wrote: From: Charles Rushing crushin2...@austin.rr.com Subject: [time-nuts] 747 Chronometer To: time-nuts@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 (drhy...@qwest.net) More hay, Trigger? ex-Cessna 140 N77149 (sigh) No thanks, Roy, I'm stuffed. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] 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. PinClockTime base 15v lightingn/c 25v lightingn/c 3+16to32v --- +16to32v 4 -16to32v ----16to32v 5Case gnd Case gnd 6Ph 1 drive sig in ---Ph 1 drive sig out- capt clock 7Ph 2 drive sig in ---Ph 2 drive sig out- capt clock 8Ph 1 drive sig out- F/O clock 9Ph 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-requ...@febo.com wrote: Message: 2 Date: Thu, 21 May 2009 17:50:33 + (GMT) From: Robert Atkinson robert8...@yahoo.co.uk Subject: Re: [time-nuts] 747 Chronometer To: crus...@ieee.org, Discussion of precise time and frequency measurement time-nuts@febo.com Message-ID: 240600.56920...@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 crushin2...@austin.rr.com wrote: From: Charles Rushing crushin2...@austin.rr.com Subject: [time-nuts] 747 Chronometer To: time-nuts@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 (drhy...@qwest.net) More hay, Trigger? ex-Cessna 140 N77149 (sigh) No thanks, Roy, I'm stuffed. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
