05-19-2014, 12:03 PM
After Daystrom acquired both Heath and Weston back in the '50s, it was decided to develop a kit-mutual conductance tester that would directly compete with other high-end testers then available.
Much of the TT-1's design was directly influenced by the Weston 981-3 tester. In fact, much of the tube-test roll-chart info can be used for both testers.
The TT-1 is definitely an excellent instrument. In fact, it has several "improvements" that make it a better tester than the Weston 981, these being: 1. Gas Test; 2. "Life Test": 3. "Disconnect" switch that takes the tube out of circuit; 4. 12AV6 tube to drive the meter.
Additionally, it offers both a left hand and right hand roll-chart thumbwheel and frankly is one of the most attractive instruments out there. AND the calibration procedure has been simplified to a five-minute procedure.
Much of the TT-1's design was directly influenced by the Weston 981-3 tester. In fact, much of the tube-test roll-chart info can be used for both testers.
The TT-1 is definitely an excellent instrument. In fact, it has several "improvements" that make it a better tester than the Weston 981, these being: 1. Gas Test; 2. "Life Test": 3. "Disconnect" switch that takes the tube out of circuit; 4. 12AV6 tube to drive the meter.
Additionally, it offers both a left hand and right hand roll-chart thumbwheel and frankly is one of the most attractive instruments out there. AND the calibration procedure has been simplified to a five-minute procedure.
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