Hi:
I'd characterize the noise as obnoxious to the point I could not have my 113AR
in the house, but only the garage.
http://www.prc68.com/I/TF_rack.html
Have Fun,
Brooke Clarke
http://www.PRC68.com
http://www.end2partygovernment.com/2012Issues.html
Chuck Harris wrote:
I found that a lot of the 1KHz noise on mine was caused
by a bad ball bearing in the motor. I replaced it with
a new bearing and the 1KHz was then only loud.
It isn't the motor, it is the 1KHz drive. Airplanes
with 400Hz 3 phase motors in the instrumentation are
similarly loud.
-Chuck Harris
Bill Hawkins wrote:
Had some interesting times with the HP-113B clock, but had to
mount it in an insulated cabinet with an insulated door because
it made so much 1 KHz mechanical noise. No wonder the housing
for the assembly is so heavy.
Did they find a quieter motor for the 115B?
Bill Hawkins
-----Original Message-----
From: George Race
Sent: Monday, October 15, 2012 2:57 PM
To: 'Discussion of precise time and frequency measurement'
Subject: [time-nuts] HP 115BR Clock Repaired and Ready to go
I still have the HP 115BR Clock. It is fully repaired and fully functional.
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