Precision Horology
Precision Horology



A photo of my Standards Laboratory from about 8 or 9 years ago.  It’s been much modified since then. When this picture was taken, using satellites for timing purposes was not completely practical. As a result, I had an ensemble of Cesium Beam  Frequency Standards as well as large satellite timing receivers and WWVB frequency comparator receivers that I used for timing purposes.  Now, of course, the ability of  relatively inexpensive timing receivers really take the place of a setup like this. Brian Mumfords Microset Timer with the satellite receiver accessory is all that is really necessary to do precise timing of pendulum clocks.

The instruments in the racks are:

Rack 1: Datum Serial Display Model 9520

Datum GPS Receiver

True Time Model 60DC WWVB Receiver

FTS Model 4030 Cesium Beam Frequency Standard and Clock

HP Model 180 Oscilloscope

Austron Model 2100 Loran-C Timing Receiver and Comparator

Tracor Model 2100 Linear Phase Recorder

Fluke Model 207-5 VLF Receiver/Comparator

Tracor Model 308A Rubidium Frequency Standard

HP Model 107BR Precision Quartz Oscillator

Rack2:Datum GPS Receiver

Austron Model 2110 Disciplined Frequency Standard

HP Rubidium Frequency Standard/Clock

Austron Micro Stepper Model 2055

HP Model 5061A Cesium Beam Frequency Standard

Austron Model 1201 Linear Phase Recorder

Datum Model 9390 Synchronous Generator

HP Model 5065A Rubidium Vapor Frequency Standard

HP Model 106A Precision Quartz Oscillator

HP Model 5065A Rubidium Vapor Frequency Standard

HP Model 106A Precision Quartz Oscillator

Rack 3: HP Model 115BR Frequency Divider and Digital Clock

Tracor Model 895A Linear Phase/Time Comparator

Tracor Model 304D Rubidium Frequency Standard and Clock

HP Model 113BR Frequency Divider and Clock

Arbiter Model 1026 Satellite Controlled Clock

General Radio Synchronometer Type 1123-AS1

Honeywell Electronik Model 195 Chart Recorders

Some of the items in the racks were not really practical to use but were significant in the history of the development of precision timing.