Bill, I've done much the same thing, putting the 113AR in a small rack cabinet stuffed full of Fiberglas® house insulation. I also lined the 113AR cabinet with rubber insulation designed for high-end auto sound system. The rubber absorbs high frequency vibrations and the Fiberglas® absorbs lower frequencies. I'm now working on installing the rack cabinet into an old kitchen cabinet lined with styrofoam and Fiberglas®. That should knock the noise down even further. Multiple plexiglas windows will allow the clock face to be seen; I'll add some LEDs inside the 113AR cabinet to illuminate the clock.
Jeremy On Fri, Jan 4, 2019 at 7:56 PM Bill Hawkins <[email protected]> wrote: > 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 <[email protected]> wrote: > > > > > > > > On Fri, Jan 4, 2019 at 4:28 PM Mark Sims <[email protected]> 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. > > > > _______________________________________________ > > > > > > > > > _______________________________________________ > > time-nuts mailing list -- [email protected] > > To unsubscribe, go to > > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > > and follow the instructions there. > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
