[time-nuts] Other HP 10x manuals (was HP 107BR)

Chuck Harris cfharris at erols.com
Thu Sep 15 18:54:14 EDT 2005

Hi Brooke,

I have a 107A/BR manual, that is out on loan for a
few days.  I'll make it available to you when it comes

As to the 1KHz whine.  It can be improved a lot by the
simple act of cleaning the gears, and replacing the lubrication
in the ball bearings.  The motor gets louder the more heavily
it is loaded.


Brooke Clarke wrote:
> HI Jeffrey:
> I have the following equipment looking for manuals:
> 107BR
> 113AR
> 114BR
> HO3 115BR
> My 113AR ran for many years then quit.  I had it in the garage since the 
> 1 kc wine would drive you nuts if in the house.  Also it was unbearable 
> if the drawer was cracked open.  Best to have all the front panel screws 
>  installed and tight to contain the sound.  I had to replace the photo 
> interrupter and also added an input circuit so it would take TTL level 
> pulses.  But is sure is nice to see mechanical hands.
> Have Fun,
> Brooke Clarke, N6GCE

More information about the time-nuts mailing list