[time-nuts] Noisy clocks [Was: Atomic Clocks]

[Bill Hawkins]

Well, your first clue should be the heavy box that contains the hardware.  Don't recall any other HP gear built that way. The box could have been an aluminum casting.

I had two of them with about the same noise, many years ago (but not new).  I used standard fiberglass wall insulation to line a wooden cabinet that also contained the 103 crystal standard. That made the noise bearable and kept the 103 temperature stable.  Of course, you had to open the front insulated door to see the clock.

Never found out if it was the 1 KC stepper motor or the gearbox making the noise.  Should have tried heavy grease on the motor gears, but that would make a mess of the chassis.  Too late now.

Bill Hawkins

On Fri, Jan 4, 2019, at 4:01 PM, Jeremy Nichols wrote:
> Does anyone know how loud the mechanical analog clock in the HP-113AR
> Frequency Divider/Clock is supposed to be? Mine is loud to the point of
> being annoying. I've surrounded it with insulation, which helps, but it's
> not really quiet. I never saw one of these things when new (1960) so I've
> no idea whether the noise is simply a function of design and construction
> or if mine is worn after 50+ years of use. [The noise is mechanical
> gear-type noise, not 1000 Hz whine from the driving frequency.]
> 
> Jeremy
> 
> On Fri, Jan 4, 2019 at 2:11 PM paul swed <paulswedb at gmail.com> wrote:
> 
> >
> > On Fri, Jan 4, 2019 at 4:28 PM Mark Sims <holrum at hotmail.com> wrote:
> >
> > > My 5065A has the Patek clock.   Those suckers are LOUD.  You can hear
> > them
> > > ticking two counties away...  hence mine is always disabled.  Once
> > started,
> > > you have to power cycle the machine to get it to shut up.
> > > _______________________________________________
> > >
> >
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