Re: [time-nuts] HP-59309A Clock counts only seconds

ot; <time-nuts@febo.com <mailto:time-nuts@febo.com>> Sent: Monday, April 03, 2017 9:33 PM Subject: Re: [time-nuts] HP-59309A Clock counts only seconds > You can get a brand new CD4011BE from pretty much most suppliers at about > 15 cents that won't exhibit the

Re: [time-nuts] HP-59309A Clock counts only seconds

<david.partri...@perdrix.co.uk> > To: "'Discussion of precise time and frequency measurement'" > <time-nuts@febo.com> > Sent: Monday, April 03, 2017 9:33 PM > Subject: Re: [time-nuts] HP-59309A Clock counts only seconds > > > > You can get a brand new CD4011BE from pre

Re: [time-nuts] HP-59309A Clock counts only seconds

.com> Sent: Monday, April 03, 2017 9:33 PM Subject: Re: [time-nuts] HP-59309A Clock counts only seconds You can get a brand new CD4011BE from pretty much most suppliers at about 15 cents that won't exhibit the problems of the earlier ones. Dave -Original Message- From: time-nuts [m

Re: [time-nuts] HP-59309A Clock counts only seconds

4000 series logic is just fine. Just replace the original parts with like. http://www.ebay.com/itm/CD4011CN-CMOS-Quad-2-Input-NAND-Gate-5-pcs-/272579598216?hash=item3f77029788:m:mSmV7o8qfGTPl04DaSu3DSw Regards - Original Message - From: "Jeremy Nichols" To:

Re: [time-nuts] HP-59309A Clock counts only seconds

A 4011 is an inexpensive part, Mouser still carries them, I would NOT buy a chinese part. Generally ESD mishandling is the cause of short component life Content by Scott Typos by Siri > On Apr 3, 2017, at 7:43 PM, Jeremy Nichols wrote: > > I have a new-to-me HP-59309A

Re: [time-nuts] HP-59309A Clock counts only seconds, HEF4011

NOt pin-compatible but functional compatible and available is the 74C00 or74 HC00, which has a long life I am using one in my gate alarm since1989, it is on all the time and the chip is available the HEF4011 is also available -- at Mouser -- it is pin-compatible and function with CD4011 ad it

Re: [time-nuts] HP-59309A Clock counts only seconds

CMOS availability has held up pretty well because of its wide voltage range. Mouser has over eleven thousand CD4011BE's in stock: http://www.mouser.com/ProductDetail/Texas-Instruments/CD4011BE/ I can't rule out an old logic gate dying, but I would suspect this first: Some clocks were made or

Re: [time-nuts] HP-59309A Clock counts only seconds

Hi A lot of the early IC’s were packaged in the era of “learning by doing”. The net result is that some of them do indeed have process related packaging “use by dates”. On top of that the early IC processes were not as fully worked out as the more modern ones. Things like metallization

Re: [time-nuts] HP-59309A Clock counts only seconds

The 14SO package is still in production, HEF4011B $0.37 ea from Digikey. You should be able to get a breakout adapter if you need the DIP. On Mon, Apr 3, 2017 at 7:43 PM, Jeremy Nichols wrote: > I have a new-to-me HP-59309A HP-IB Digital Clock. The clock works on both > the

Re: [time-nuts] HP-59309A Clock counts only seconds

You can get a brand new CD4011BE from pretty much most suppliers at about 15 cents that won't exhibit the problems of the earlier ones. Dave -Original Message- From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Jeremy Nichols Sent: 04 April 2017 00:44 To: